Re: [accelstepper] Digest for accelstepper@googlegroups.com - 4 updates in 2 topics

[Luciano Veneziano]

No, ti ringrazio ma voglio cominciare a scrivere in C.

Non capisco perché si bloccano i motori.

L.V.

Il gio 15 gen 2026, 19:02 <accels...@googlegroups.com> ha scritto:

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• Rotate stepper like DC motor - 2 Updates
• Sketch written for 6400 mircrosteps, only works if driver configured to 3200 - 2 Updates

Rotate stepper like DC motor

Luciano Veneziano (Veleno) <luciano....@gmail.com>: Jan 15 09:30AM -0800 *Hello.*   *I would like to use AccelStepper to build a coil winder. I just want to know if it is possible to make a stepper motor complete N turns, counting them without stopping, and with the other stepper motor be able to move back and forth to position the wire correctly. Thank you, unfortunately I am elderly and I am just starting to learn C.*   Another thing that happens is that the engines stall; I haven't understood why.   *Thanks again.*

je...@siddall.name <je...@siddall.name>: Jan 15 09:46AM -0800 If you don't want to start programming from scratch (trust me, there is a significant learning curve!) you could just use the one I designed over here:   https://www.talkbass.com/threads/custom-fully-automated-pickup-winder-build.1451957/   Jeff   On Thursday, January 15, 2026 at 12:30:57 PM UTC-5 luciano....@gmail.com wrote:

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Sketch written for 6400 mircrosteps, only works if driver configured to 3200

Andris Cuksts <cuk...@gmail.com>: Jan 14 01:36PM -0800 Geoff, made 2 alterations to your code before running the test, I change the pin numbers from 2 and 3 to 8 and 9 so I wouldn't have to do any wiring changes. I set the driver dip switches as documented on the driver to 3200 steps. Ran the sketch and the bridge only rotated half as far as expected. I changed the driver dip switches as documented on the driver to 1600. Ran the sketch again and on the last step it rotated the full 360 and back.   I set a piece of flex track opposite of bridge track to check alignment before and after the test. The alignment was slightly off after doing the second test. I have attached pictures of before and after the test.     The following are the results of the second test.   ⸮ HA⸮X⸮⸮FF⸮=== AccelStepper Bounce Test === Starting position: 0   --- Bounce 1: Track 1 --- Target: 80 | Steps taken: 80 | Current position: 80 Target: 0 | Steps taken: 80 | Current position: 0   --- Bounce 2: Track 10 --- Target: 800 | Steps taken: 800 | Current position: 800 Target: 0 | Steps taken: 800 | Current position: 0   --- Bounce 3: Track 19 --- Target: 1520 | Steps taken: 1520 | Current position: 1520 Target: 0 | Steps taken: 1520 | Current position: 0   --- Bounce 4: Track 31 --- Target: 2480 | Steps taken: 2480 | Current position: 2480 Target: 0 | Steps taken: 2480 | Current position: 0   --- Bounce 5: Track 40 --- Target: 3200 | Steps taken: 3200 | Current position: 3200 Target: 0 | Steps taken: 3200 | Current position: 0   ========== RESULTS ========== Track 1 Total Steps: 160 Track 10 Total Steps: 1600 Track 19 Total Steps: 3040 Track 31 Total Steps: 4960 Track 40 Total Steps: 6400 =============================   Test Complete!   We did many more tests and altered your program to do 4 full rotations to see if alignment was off after the 4 rotations. It was.   I'll do more testing in a more disciplined way using your sketch going with 6400 micro steps to see if alignment results are better.   If in the end we suspect the driver is a clone and has less than quality parts (and dip switch documentation), I would have no problem buying another driver but I will need help to find a vendor that will source a quality driver.   Regards,   Andris

gjgsm...@gmail.com <gjgsm...@gmail.com>: Jan 14 03:39PM -0800 Andris, if I’m reading your reply correctly, the serial monitor output is indicating 3200 steps/rev even though you set the driver to 1600?   The pics show a mis-alignment of ~0.5mm after one (3200 step) revolution? Is the mis-alignment cumulative after four revs?   Circle Calcs   Dia - mm 305   Circumference 958.2     steps/rev 800   mm/step 1.20     steps/rev 3200   mm/step 0.30     steps/rev 6400   mm/step 0.15   Possibly 1 or 2 step ‘miss step’ or ‘add step’ depending on the direction? Test a 360 deg rev at a lower step resolution say 800 steps/rev and if it’s a ‘step’ issue then the mis-alignment should be proportionately bigger (~1.2mm).   If you end up getting another driver, this is where I get mine: https://www.omc-stepperonline.com/ Let us know how you go with your testing.

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