- October 22, 2016 at 6:39 pm #19929
I have searched and read through most of the posts on setting driver current limits and came to two conclusions…either I’m severely math impaired or I just crave the special attention of my own post. But seriously I think it’s the math…
Just finished my 24″x48″ cut area build. I’m running the machine with a Raspberry Pi with the Protoneer Raspberry Pi Hat running at 24v, A4988 drivers set to 1/16 microstepping.
Steppers are: 2.8v, 2.0a per phase, 1.4ohm phase resistance. I am running the XY pairs in parallel with your wiring harness.
Any idea what my currents on the XY pairs and the z motor should be? Looks like the factory defaults are at .55
Thanks in advance for your time and sorry if this is redundant.October 22, 2016 at 8:19 pm #19930
In parallel for the x and y no more than 4/2.5=1.6v max but I am guessing that you can’t turn them up much higher than .6 or .7
In series 2/2.5= .8v but that again should be max so .6 or .7 this also works for the Z axis.
You are fighting thermal shutdown so keep an eye on them for the first few uses, drivers and stepper temps.October 22, 2016 at 8:19 pm #19931
vicious1KeymasterOctober 22, 2016 at 9:13 pm #19932
Awesome…thank you sir…
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