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RADDS 1.5 Compatible Stepper Drivers?

Posted by peps1 
RADDS 1.5 Compatible Stepper Drivers?
March 21, 2019 01:26AM
Hello, looking to switch out my DRV8825 drivers, but the RADDS manual only states support for RAPS128 Drivers as an upgrade. Are there any other drivers like the TMC2208 that will work with RADDS that don't require lots of mods to the boards wiring?

Thank you for taking the time to read.
VDX
Re: RADDS 1.5 Compatible Stepper Drivers?
March 21, 2019 03:37AM
... the RAPS128 have the same pinout as the other "pololu-like" drivers - only the polarity of the enable-pin has to be inverted in the firmware ...


Viktor
--------
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Re: RADDS 1.5 Compatible Stepper Drivers?
March 21, 2019 11:26AM
Quote
VDX
... the RAPS128 have the same pinout as the other "pololu-like" drivers - only the polarity of the enable-pin has to be inverted in the firmware ...

Thanks, VDX, I get the RAPS128 will work, I just wondering what my other options would be on the RADDS board?
Re: RADDS 1.5 Compatible Stepper Drivers?
April 03, 2019 01:25AM
Quote
peps1
Quote
VDX
... the RAPS128 have the same pinout as the other "pololu-like" drivers - only the polarity of the enable-pin has to be inverted in the firmware ...

Thanks, VDX, I get the RAPS128 will work, I just wondering what my other options would be on the RADDS board?

Any pololu style stepstick should work in the RADDS provided that your firmware supports it (or can be kludged to support it).

My RADDS has tmc2130 (w/ spi) and lv8729 in it. I ordered some tmc5160 and do not expect that there will be issues.

There is a consideration with all trinamic drivers (and possibly others) that they require VMOT to be powered before VDD, which means that you have to assure that the DUE board is not powered over USB prior to the RADDS having 12v or 24v power applied. But that's not a RADDS thing, it's true no matter where you use them.

Edited 3 time(s). Last edit at 04/03/2019 01:28AM by Timpanogos Slim.
Re: RADDS 1.5 Compatible Stepper Drivers?
April 03, 2019 03:04AM
Quote
Timpanogos Slim
There is a consideration with all trinamic drivers (and possibly others) that they require VMOT to be powered before VDD, which means that you have to assure that the DUE board is not powered over USB prior to the RADDS having 12v or 24v power applied. But that's not a RADDS thing, it's true no matter where you use them.

That's not quite true. You can apply Vdd before Vmot, but the SPI or UART interface won't work until you apply Vmot. So you have to delay initialising them until Vmot is present, and if Vmot is lost and then restored then you need to re-initialise them. Duet electronics with RepRapFirmware does this.



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Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
Re: RADDS 1.5 Compatible Stepper Drivers?
April 05, 2019 02:13AM
Quote
dc42
Quote
Timpanogos Slim
There is a consideration with all trinamic drivers (and possibly others) that they require VMOT to be powered before VDD, which means that you have to assure that the DUE board is not powered over USB prior to the RADDS having 12v or 24v power applied. But that's not a RADDS thing, it's true no matter where you use them.

That's not quite true. You can apply Vdd before Vmot, but the SPI or UART interface won't work until you apply Vmot. So you have to delay initialising them until Vmot is present, and if Vmot is lost and then restored then you need to re-initialise them. Duet electronics with RepRapFirmware does this.

That must be nice. Marlin just halts and demands to be reset.
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