RepRapFirmware on other controllers

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  Duet sometimes really slow? - I2C error or?
  • Martin1454

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  @dc42 Yes I'm aware of the Van de Graff issues with belts - can cause all sorts of problems with model helicopters I believe because the tail rotor is often driven by a continuous belt and the resultant static plays havoc with the receiver. Also anti-static belts are often used in conveyor systems. But I wonder if it's an issue with printers because generally the belts constantly change direction back and forth rather than always rotate in the same direction. It's an awfully long time since since schoolboy physics but if one reverses the direction of a Van de Graff generator, doesn't that reverse the polarity of the charge?
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  Anycubic Kossel Plus printer with duet board
  • ohluckyirish

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  Please post that video on a public site. Facebook won't let me watch it.
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  Prints leaning - and changing side they lean to
  • themelle

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  I don't know why it only occurs on a layer change. The DRV8825 datasheet says it requires 1.9us step pulse with, 1.9us setup pulse interval, and setup and hold times both 650ns. So you should use at least T1.9:1.9:0.65:0.65 in the M569 command. What's surprising is that it works at all if you don't extend the step pulse width. In practice, the values you specify in the T parameter get rounded up to the nearest multiple of the step pulse clock interval, which on the Arduino/RADDS is 1.52us.
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  Stop stepping motor
  • Theo

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  @theo said in Stop stepping motor: Thanks for your answer A little bit disappointed by your solution. I am sure you feel that is not a clean way to work. Please update me once you have developed a better way to stop a motor . I have used Minitronics for years and stopping a motor is clean. Anyway many thanks for the time spent to study my request I think it's a pretty good idea. It can all be done in a macro.