z motor not driving when connected to leadscrew
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used the exact cable and motor but on a driver I knew worked and it spun fine. Does this mean my driver is dead? and if so how do i replace it?
Also I already have some extra A4988 divers so could I somehow use that instead/ to replace the other driver?unfortunately it does seem so if the motor works on another driver with the same config. replacing it is a little tricky whiteout pre-heating the whole board and using hot air or infrared heat to desolder the chip before soldering in a new (if its a cloned board it might be easier to repair as it usually has half the copper weight, but still there are large ground planes on several layers)
it needs to be a TMC2660-PA driver, the firmware needs the SPI interface to configure the driver - on the bright side TMC2660-PA seems to be in stock with the major distributors again, it was impossible to source for months leading up to the holidays.
Only weird thing is there is no visible damage to the driver itself or any of the surrounding components. Additionally now that I have the motor connected correctly I'm getting the error message that phases A and B may be disconnected.
there are no rules to say a failure has to be spectacular (also downside to cloned boards is you have no guarantee the chips are not inferior counterfeits and in general no quality control to speak of)
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@bearer said in z motor not driving when connected to leadscrew:
TMC2660-PA driver
I have a soldering iron and hot air gun for soldering, since its a surface mount part that might be a bit tricky though. I was reading awhile back that you could connect additional drivers to the board so would I be able to use one of the A4988 drivers and connect it to the expansion headers?
If not is this the correct part to replace the driver?https://www.digikey.com/en/products/detail/trinamic-motion-control-gmbh/TMC2660-PA/4500212 -
if its a ("dumb") driver module ala step-stick then yeah, you can drive that off the expansion port by step/dir signals.
hot air and another printers heated bed might be all you need to replace the chip though.
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tmc2660 on duet 2 is connected with series sense resistor on the output H bridge .
if you're lucky , you burned only the sense resistor .
check it with multimeter , R33 and R35 near the z axis driver IC .
while testing the z axis driver , did you place jumpers back on the second z motor connector ?
