electronic lead screw manual

electronic lead screw manual

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electronic lead screw manualIn addition, I decided to add a VFD to control the motor spindle speed. Since the VFD driven spindle is a separate system to the electronic lead screw I broke it down into two parts: the spindle drive system and the lead screw drive system. The spindle drive system is pretty straight forward. Replace the single-phase drive motor with a three-phase and drive it with a VFD. The lead screw drive system uses an Arduino to create a sort of electronic gearbox. The Arduino reads the spindle speed and adjust the servo RPM to match the correct ratio based on user input to create either metric or English threads. An LCD display was used along with two momentary push buttons for the user interface. This allows the user to select either metric or English units and thread sizes. Once the desired thread or pitch is selected a 3-way switch is used to turn the motor in either CW or CCW direction. Once the motor is running the LCD does not update and you cannot change the thread pitch until the motor is stopped. The EMI filter was placed on the power supply side to the VFD. Ferrite rings were used to reduce noise going from the VFD to the motor. The VFD can be used with an external potentiometer as well which is needed to control the motor speed while operating the lathe. The 10k pot works well.These items were assembled into a nema 4 enclosure and wired together (I'm a mechanical guy, pay no attention to the birds nest of wire). The power supply was mounted in the VFD enclosure. I decided to go with a NEMA 23 stepper motor with 3Nm of torque, If I could do it over again I would have stepped up to a NEMA 24, this motor has just enough power to cut threads without stalling. The adaptor had a 0.75in bore with the same keyway that matched the existing lead screw. I cut out bottom of the safety door to fit over the stepper motor so it can be closed.

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Lead Screw drive system showing stepper and synchronous belt drive I used a microstepper driver to interface between the Arduino and the stepper motor. The driver uses the 24v power supply to pulse the stepper based on the signal from the Arduino. I simply mounted this on the underside of the bench near the stepper. I did not put it in the VFD panel since there was too much EMI. To measure RPM of the spindle I used this inductive Hall effect sensor. Since it came with its own LCD I was able to use it to calibrate the Arduino speed calculation. I glued the magnet to the spindle as show below. I used a small plastic case to house the LCD screen, Arduino, breadboard, and switches. Plastic case Arduino LCD Push buttons 3-way switch Enclosure with LCD, push buttons, Arduino, switches, and potentiometer for spindle speed The Code The program has a few functions. The screens are setup using an array so it is scalable. It uses the X variable to denote metric vs. English and the y variable prints each data field on the screen.So when you are on the metric screen and you press button A the pitch will change. If you are in English the TPI will change.The stepper RPM will only change once per spindle revolution. Again, depending on which screen you are on it will either calculate English or metric.While the stepper is running this loop is not active since it slows down the processor of the arduino.If you are cutting threads do not stop the servo motor as this will cause the spindle and lead screw to get out of time. You will not be able to retrace the same thread profile. If I had more time I would have put an encoder on the stepper motor to make a closed control loop so that the spindle and lead screw could be synchronized based on position as well. But this seems to work fine and I was able to cut metric threads with this setup as long as the servo stays running (just disengage the carriage like normal). Below you will find a list of components and basic description of each item to build the project along with schematics. The wiring diagrams are attached along with the source code. You should be able to put it all these pieces together, upload the code and start cutting metal.Author Nick Romeo 1 project 18 followers Follow Additional contributors Lathe tachometer code by Tony Scarpelli Published on May 2, 2019 Respect project Write a comment Share Members who respect this project and 69 others See similar projects you might like Table of contents Lathe - Electronic Lead Screw Components and supplies Necessary tools and machines About this project Background Spindle Drive System (VFD Lead Screw Drive System The Code Conclusion Code Schematics Comments (66) Respect project Write a comment Share Similar projects you might like I made an electronic music instrument with 13 keys. Electronic Music Project showcase by Glauber Santiago 1,822 views 1 comment 0 respects Arduino Safe - 6 digit Passcode Electronic Safe with Arduino Project showcase by chummer1010 36,184 views 30 comments 70 respects A new piece for percussion quartet seeks to bring physicality to electronic music using two custom musical instruments. New Electronic Music Instrument Design Project showcase by cpeckmusic 6,723 views 1 comment 24 respects The Zeus Weather Station (ZEWS) is an initiative of the Harry Fultz Institute Open Source Club to promote open source hardware and software. The Zeus Electronic Weather Station (ZeWS) Project in progress by moisi 4,076 views 0 comments 16 respects Play, create and solve Sudoku puzzles using this easy to build, Arduino-based project. Or connect with your social account: Login with Arduino New here. With the ELS,ELS is tailored to compliment manual lathe operation with a command set thatIn fact withThe motor is controlled by the on board PICOutputs include OC transistor driversIn fact, the ELS was designedThe ELS uses aA worn out or cracked plastic keypad is not a reason to discard the ELS. That means for the life of your lathe or lathes, your product can always beAs an example of what goes wrong with closedClosed source forces you to choose (if that can be called choose) Vista. Check it out by downloading itThe on board PIC programmer can be used to install any sort of softwareWith extra connectorsClick on clear area toScrew Source Code Hammond Box Blog Artisans would like to thank them for their help and support. Motor Driver donated to project and tested with ELS. Electronic Lead Screw Main Page Thoughts or feedback? Thanks, MGAt that low price it must be a do it your self kit. You will probably building a lot of brackets and adapters. Babin sells one for the HLV-H, never used that one either but it will cost more and probably has all the hardware for the installation.Still there? No updates?I don't think it's a bad system but I won't be fitting one to my lathe. The fundamental flaw then (and probably now) is that the spindle rpm was only sampled once per revolution. If that is still true, then it will take a few revolutions for the control loop to settle down. That will make the first few threads wonky. In practice this means you should extend the part to make 5-10 extra threads that are then cut off. DazzElectronic Lead Screw Main Page Thoughts or feedback. Thanks, MG If you really WANT CNC. Buy it ready-made and already integrated and proven.But somehow threading works on lathes without ball screws anyway.I was doing a lot of hydraulic repairs for a bit and really, really wanted one of these to make metric threads easier on my inch manual lathes. I haven't cut a metric thread on a lathe in awhile so have not thought about this for awhile. The hobby cheap part goes right out the window when you get into real size machines. If you're going to de-couple the gearing from the spindle to the feedworks you need several HP to drive that stuff. If you want to buy new, real automation parts to do this it will set you back a small fortune. That website shows a TINY stepper motor.But somehow threading works on lathes without ball screws anyway. Also, it's worth looking around for something called K-flop. No point re-inventing the wheel.And I also did not like the one pulse per revolution of the spindle. Not only might the first few threads be funny, but if you hit a harder spot in the material being threaded, then the thread you are cutting and perhaps one or several more past that point will also be funny. Not my idea of a quality system. But they, of course, discounted any such concerns. IMHO, there should be at least 100 pulses per revolution to get anywhere near what you would want. Even more for high TPI threads. I don't think it's a bad system but I won't be fitting one to my lathe. In practice this means you should extend the part to make 5-10 extra threads that are then cut off. Dazz Not only might the first few threads be funny, but if you hit a harder spot in the material being threaded, then the thread you are cutting and perhaps one or several more past that point will also be funny. But they, of course, discounted any such concerns. There's a trigger pulse, then the control coordinates the speed and feedrates. That's the reason you can't change speeds between passes. (Newer lathes maybe have better compensation for the servo lag, but that's how most anything older than 2000 was.) There were a few more advanced controls that could do stuff like the weird cable drum thread that's not constant, but that was an unusual and extra-expense option.What if you want multi-start threads. A single pulse would be useless.What if you want multi-start threads. A single pulse would be useless. But straight ol' 2 axis lathes, it's just speed, feed and a trigger pulse. Works fine. You can ask Vanc to confirm on newer stuff, but on older.It was more of a copy thing. Never owned one though, you'd have to ask a Hardinge guy.Gotcha, smart guy!! Gotcha, smart guy!! Inertia, you probly heard about that. I can't speak for Jap manuals but all the US control manuals explained this. They even had a formula for the lead-in distance required, based on pitch and speed. It would be pretty unusual that you couldn't get the threading tool three pitches father away from the end of the part Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world?s largest manufacturing technology forum for free today to stay in the know. Learn more about us. All rights reserved. Register today. To learn more, please refer to the cookie policy. We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. You may unsubscribe at any time. For your lathe! Keine Wechselrader mehr wechseln, kein Getriebe mehr schalten. Give length, cutting depth and thread pitch and off you go. Fully automatic, in 4 cutting strategies and also as tapered thread or multithread. Internal and external machining is possible, radii convex and concave and also grooves. A printed 100-page manual comes with the controller, in english of course. Well suited for the occasional lathe operator, for small workshops with recurring tasks and ambitious hobby lathe operators who want to add new exciting functions to their lathe. In addition there are possibilities for spindle control (FU output with 0-10V), faster menu navigation, diameter display and 24V compatibility at the inputs and outputs. Glavrida lacus et amos for aute. You don’t have to create any drawings or programs, just enter the few values you need for processing and you can start working immediately. Just turn the knob! This saves you a position display, which is already included with the ELS. Alternatively, you can download the manual as a PDF file. Updates are free of charge. External and internal turning to precisely adjustable positions, facing and cutting off are of course also possible. Thanks to the constant feed, cut-off with the ELS works much better than by hand. All cycles work with several cutting steps, which can be set very easily before starting: You just turn the knob and select the number and depth of cuts. It cuts any thread fully automatically, even imperial, tapered and multi-start threads are possible. On request, the cut can also be made with flank or modified flank infeed. You can turn cones of any size, inner and outer radii, convex and concave, both round and elliptical, without any additional tools or adjustments. Grooves are also possible! The drives always stop at 0 and at the specified nominal position when moving manually. Standard cycles Turning Internal and external turning with exact position indication and freely selectable feed rate. On request also with fast roughing and fine finishing feed. Facing Facing with constant chip removal guarantees mirror-like results. It can be face turned in several adjustable passes. Parting Cutting off is much easier with the ELS because the cut-off tool is driven very evenly into the material. This makes it easier to cut on small machines. Gearmodes In gear mode, the lead screw is driven as if a gear were connected. You can rotate as before when the gear was still needed. This allows you to rotate conventionally, but freely adjust the feed rate. Left and right drive are available Angledisplay Shows the angle of the chuck. Handy for angle operations as well as multistart threads. Extended cycles Threading Thread cycles for internal and external threads with freely selectable pitch (in steps of 0.001 mm). Inch dimensions must be entered in mm. Also tapered threads (inside and outside), multi-start threads and thread repair. Undercuts Undercuts according to DIN 76A with selectable depth and length can be created. Drilling A drilling cycle for drilling with a drill in the tool holder. You can select the number and depth of each infeed as well as different retraction strategies. Taper turning Taper turning without having to adjust the machine. Any cone dimensions can be created, also according to cone ratio if required. Inner and outer tapers are possible. Including cutting radius compensation. Radii Turning radii without additional tools: Both circular and elliptical radii are possible. Radii inside and outside, and then each as convex or concave shape. Round Grooves This cycle creates grooves on a shaft, circular or elliptical grooves are possible, an offset in X-direction is also possible, thus very flat grooves are possible. Practical for rope pulleys, running wheels etc. NEW: Straight grooves This cycle creates straight grooves on a shaft, with angled or straight flanks. Very usefull for V-Belt pulleys, for which the ELS4 has 4 standard sized stored, SPZ-APC with 2 angles each. But custom grooves of any size and angle are possible too. Universal connections Supply voltage The ELS 4 Basic is supplied with 12V, the ELS 4 Pro with 24V. A jack socket is available for this purpose (with the ELS 4 Pro also a terminal). The voltage input is protected against reverse polarity and fused. These signals are routed out via RJ45 sockets and terminals. The ELS can be adapted to any drive via the settings. Up to 24V can be applied here. The software supports different polarities (NC or NO contacts) and has emergency stop and limit switch programs. Each channel can output up to 24V and 300 mA. The functions are emergency stop sequences (with delay), cooling, spindle stop and spindle start (ELS 4 Pro). Either the ELS 4 control panel from Rocketronics can be used or your own, but then a connection board is necessary (in preparation). By coupling with the spindle, all axis movements are strictly synchronized with the spindle rotation. This then rotates the leadscrew and moves the carriage of the machine. We recommend closed-loop stepper motors or hybrid servo motors. A simple stepper motor is sufficient, which keeps costs down. The driven X-axis gives you a significant added value, only then can the cycles run fully automatically. There you will also find attractive complete packages with all necessary accessories. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. This means that every time you visit this website you will need to enable or disable cookies again. That’s the bit that allows threading operations, arguably the most important job a lathe can tackle.So he set about building an electronic leadscrew for his lathe. The idea is to forgo the gear train and drive the leadscrew directly with a high-quality stepper motor. That sounds easy enough, but bear in mind that the translation of the tool needs to be perfectly synchronized with the rotation of the spindle to make threading possible. The video below has some great detail on real-time operating systems on microcontrollers as well as tests on all the hardware to be used. Adding an encoder and implementing feedback would make it far more reliable. You’re looking at hundreds of dollars minimum just for the gears. I would definitely encourage closed loop encoder system for this because even a slight misalignment causes a completely useless screw thread. If you try printing 8 parts and one of them hits the extruder and it misses a few steps the rest of the parts are ruined. It is not unheard of to leave the printer going and come back to see one part knocked off and a bunch of other pieces with a big “skip” in them. The open loop system such as this can lead to missed steps and inaccuracy. Getting some feedback (more than an end stop swtich) could result in faster motion without loss of position. You might even get an alert from the machine when position is not where it is supposed to be. Some of the tmc2130 look to give some feedback by monitoring stepper amp usage but an encoder of some type would be nice. Both external and internal thread cutting. You can buy built up PCB’s for these for around EUR45, or spin your own boards and get source from github. The different modes and settings and whatnot you can control them with is crazy. The RT kernel can be confusing to anyone who hasn’t studied it previously, and understanding how to setup the tool pass can be tricky. I know how challenging it is to get arbitrary threading right.Digitally controlled lead screws are what cnc threading is done with (well, ballscrews, but same concept). Or, more generally, any case where the spindle speed may not be real stable due to insufficient power, low rotating mass, or unbalanced work. The variation can be pretty significant. (having threaded special size threads for the holding bolt on a single throw crank, I know it can be VERY significant, even on a larger lathe) I think I ended up with 65 teeth on my encoder disk and have no problems threading or eccentric turning even with very low VFD (30 RPM) speeds or even hand cranking. It’s really nice to turn by hand and see the operation in slow speed to check your setup. I used a bunch of industrial surplus gear. “Smart” stepper with built in driver, touch screen, atmel dev board, and a motor control board with electronic gearing features. Never did a write up on it though I’m afraid. Cutting can be very smooth when the tool feed can be tuned. And I would never have been able to find gear sets to cut those wierd brittish threads on my vintage bike without this mod. Doing this is highly recommended. I’ve been considering the ODrive 8192 CPR capacitive encoders though I haven’t purchased one yet.ODrive AMT102 looks interesting. Just to avoid people getting confused, I’d like to note that the 8192 CPR refers to the 2048 PPR (pulses per rev), which if processed in X4 mode (counting both rising and falling edges for A and B channels), provides a resolution of 8192 CPR. Stefan Gotteswinter (check his youtube channel) uses this). There is also this Arduino based implementation that you could start with.. It is used by amongst others Stefan Gotteswinter, who doesn’t tolerate imprecision of any kind (check out his Youtube channel) There is also fairly decent code for Arduino available on Github, search there for ZyklenAutomatik, there are related visoes on Youtube showing this at work. From personal experience knowing how to make useful things such as this creates a risk of spending youtr time doing that, whilst losing sight of why you need it in the first place. For me I plan to buy the ELS II for my lathe, the time saved experimenting will be taken up by actually making stuff. Generally easier and less likely to have rounding issues or uncompensated error by using integers and an error accumulator a la Bresenham. (Yes, I know there are more modern algorithms, but they generally have grown from the same root) It is simply an excellent algorithm for mapping one integer range to another with less than a single count of error. At 24:30 he shortly says he will put actual numbers into the thing. With Bresenham (or also with the floats) it would be relatively simple to predict the next step for the stepper motor and program a delay in a hardware timer. That same hardware timer can then also trigger an ISR and re-program itself with a new estimate. This would completely eliminate the need for low us loops and free the uC for handling other things. The STM32f103c8t6 has hardware encoder support and some of the newer atXmega’s also have hardware support for encoders. But not only for the lathe, but also for milling spirals on a mill, but have not gotten around to it. I do prefer SMD parts though. When it comes to hardware I will not use the big TI chips, but a smaller uC with hardware encoder support, probably the STM32 mentioned above. Building a teaching arm for an industrial robot would also have a controll loop very similar to this. See this project for an example of nice UI for a (nice) ELS: And yeah, the project uses an Arduino Mega to read a 800 PPR encoder. A “Russian ELS” (by Oleg A) uses an Arduino Mega to work with a 1800 PPR encoder. So yeah, if someone doesn’t use floating point and knows his way to program MCUs efficiently, even a 16 MHz Mega can handle it. Well-priced and they have warehouses in several countries (USA, UK, Germany) so some items can be shipped very quickly and without customs fees. Floating point is faster, and at worst causes a sub-10,000ths positional error: I wish I had time to look and see if it can be done with rational arithmetic. Then all integer and no errors at all. Drawback, denominators can get huge if the application is not a good fit. In the comments he states he has the intention to release his source code. It uses a Nextion LCD (Touch screen) and encoder. He also put quite some efforts to put tables for common trheads and modules into his software. He really did a nice and thorough job I just found this discussion, and maybe I’ll hang out here from time to time. I retired since posting that, and I’ve continued to improve it, but I’m really terrible about doing videos. I’ve gotten a camcorder now, and intend to put some more thing(s) up soon. I’m doing interrupt-driven real-time closed-loop control with scaled integer math on an Arduino Mega. With careful design, multiplication can often be simple shifts, and the only time I ever do a division is when recalculating the lookup tables. My spindle encoder is 800ppr, and I’ve got a resolution of 32k steps per inch on the leadscrew. I supposed it helps to have started doing embedded systems on a 6502 way back in prehistoric times. While I am more than capable of rolling my own, there are other things I prefer to do with my time so looking forward to not having to do the sw development myself:-) I think it is not going to work no matter how fast your controller is. Now I can surface stuff without wearing out my expensive, precision leadscrew. Learn how your comment data is processed. It’s Much Worse. It’s Much Worse. Get The ISBN 411 Over IoT Ren on Already Have That Book. Get The ISBN 411 Over IoT Ren on Parking Assistant Helps Back Up The Car Without Going Too Far Danie Conradie on An Elegant Modular Enclosure System For The Raspberry Pi 4 Now on Learn more. Or they need a big computer, too. Any suggestions to get past both of those problems would be greatly appreciated. I read that a full fledged CNC program can work (and actually, more cheaply, since I already have steppers, stepper drivers, and spare older computers with parallel ports). BUT a computer and associated gear and wiring is practically the size footprint of the lathe. BUT also the single pulse per revolution of the spindle in most stepper CNCs is NOT accurate. BUT some say it is and the reason it isn't accurate is because Mach 3 has bugs in the threading portion of the code. But TurboCNC has been used for threading for over a decade. But is it accurate enough. But LinuxCNC uses a quadrature signal besides the single pulse, so maybe it is acceptably accurate. But GRBL a simple CNC program that can run with very simple compact computers like Raspberry Pi to control an Arduino has no lathe threading capability. Most threads devoted to this kind of thing seem to deteriorate after the first two or three pages into arguments about closed loop and open loop theories and the number of pulses per revolution or inch, etc. Is there such a thing. My guess at least from reading so far, is no. Yes? I will see if I can find it again. However, why not use an arduino and make your own? Arduino control. I remember getting just as frustrated trying to find a simple solution. What do you actually want it to do though?? Do you want it to do the whole threading job?? Or do you want to do the threading yourself and just have the speed controlled electronically. If you want to do it yourself, all you need to replicate electronically is the change gears, so a simple spped control circuit would be the main part, tie it to the headstock speed with a comparator and bobs your uncle. Then for threading either keep the half nuts engaged or use a thread dial. If you want the electronics to do the whole job, then you'll need to have something keeping track or where everything is plus drive 2steppers, so then you getting into big enclosures with lots of parts. In fact you'll be jusst pn the edge of a full cnc machine. Personally I'm going to go stick with change gears for now ( if i ever make any). And in the future have a simple speed controlled lead screw In my mind a single pulse will give position but not direction, but I may be wrong again Stuart If I were to go ELS I think Bertie's idea would be my choice so I would like more info from Bertie, AKA explain a bit more please B. This is one of those good to have mods in my one day do list. Deside what you want and stick to it. How about automatic threading with multipass. Like this spindle speed caculation: Do you have enough spindle gear inertia and stiff (AC drive or constant rpm servo) to keep the spindle near constant velocity and can get by with one pulse per revolution. Or do you have lightweigh mechanics and fluctuating DC-drive and really need all the pulses you can get and processor to cope with vartying spindle speed and beeffy servodrive to keep up the feed with this fluctuation. Like shooting moving target that chances it's speed all the time. The big question that dawned to me is: If you lathe and gear is big enough to make electronics and calculus simple it is likely to have threading feeds. If your lathe does not have it you have to make it CNC way and then this ecological niece is not that big. Anyway, I don't see any fundamental reason it would not work simple if carefully designed. Pretty sure my ramblings will not add much, but here is one eager watcher. Pekka Not only is it dead easy, but it also has a port to connect to a CNC controller if you want to go that way for some jobs. And you can continue to ue the lathe manually. When threading, it does not reverse the spindle. It retracts the tool and reverses it quickly back to the starting point, feeds it back in with a setable increment and runs down the thread again. It moves the tool along the flank of the thread so it cuts only on one side - the 'proper' way. I lave the fact that it has its own look-up tables for just about all standard threads, can do taper threads, turn standard tapers and can broach without the spindle running. What more do you need? Joe Got the tee shirt, been sick all over it and it's now a shop rag. Unfortunately got to go out today so wont be able to post until later tonight but there are answers. The software was very simple and runs on an old laptop but would easily fit on a Pic or similar. The difficult bit in extending that idea is picking up the thread on subsequent cuts.

hyuk GR


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You may also make your yacht available for charter "with or without skipper," letting the renter choose if he wants to have a skipper on board or not (depending on the renter's preference and navigational experience.

I remember you the simple steps to create a boat rental offer:

1. Register you account as boat owner on Airynb site.

2. Register your boats on Airynb site

3. Insert a boat rental offer for every boat with calendar and price.

Boat renter communicate with you through "send message" button in the rental offer filling in the Airynb contact form. Remenber that you deal directly with the future boat renter.

You will pay a token for every day that your rental offer will be present in Airynb site. The value of the token depends from the number of your boat's feet.

When the boat renter will accept your boat rental offer you will delete the rental offer for that period on Airynb site. From that moment you will not pay more.

Airynb will notify you well in advance when the token payment will be active. From now until then you will pay nothing to enter your boat rental offers.

Charter Request

To offer a discount or make a personalized offer to a boat renter, you can do it directly dealing with the boat renter.

You will be able to share contact information, email and phone numbers with the boat renter.
The first time will be when the boat renter will send you a message via the Airynb contact form by replying to one of your boat rental offers.
When you will receive your message you will be in contact with the boat renter and from that moment you can exchange email and phone numbers.

You have to register on Airynb site. You click on "access", click on "create account" and fill in all the information.
a. select "I am boat owner"
b. insert email and phone number
c. insert name and surname
You will receive an email to the communicated email in the registration, click on the URL and from that moment you are registered on Airynb site.
After it you join the Airynb community. Please recommend it to friends or family. Click on the links you find on the Airynb site, such as Facebook, Twitter, Instagram, Google +, Linkedin, Youtube and Pinterest.

Yes, your personal information is secured.

Our website uses the highest security standards to assure your security. All the information present on Airy&b are secured. The site is verified by a SSL certificate.

To modify your password, go to "My Account" and then "Profile". Once you are on your profile, click on "Edit my Password".