Maybe I'm seriously misunderstanding something here.
I have a BTT SKR 1.3 and TMC2208's in UART by default; I confirmed that there's a J2 resistor on each driver.
I set the BTT SKR 1.3 for UART via these instructions:
[
github.com]
I then did what I needed to do in the firmware via these instructions:
[
grobotronics.com]
I'm pretty sure everything is setup right but when I changed the current limit for each stepper, I'm not seeing a change. This is annoying. I dropped the current for each stepper to 200ma RMS to see a drastic change and still I see nothing.
Am I missing something here?
Edit: I checked to make sure the J2 resistors were soldered to the driver boards correctly by probing the J2 pads with my DMM.
EDIT: I ran the code M122. It looks like its working but the steppers are still running as if they have way more current than what I set.
READ: X Y Z Z2 E
READ: Enabled false false false false false
READ: Set current 200 200 200 800 200
READ: RMS current 183 183 183 795 183
READ: MAX current 258 258 258 1121 258
READ: Run current 5/31 5/31 5/31 25/31 5/31
READ: Hold current 2/31 2/31 2/31 12/31 2/31
READ: CS actual 2/31 2/31 2/31 12/31 2/31
READ: PWM scale
READ: vsense 1=.18 1=.18 1=.18 1=.18 1=.18
READ: stealthChop true true true true true
READ: msteps 16 16 16 16 16
READ: interp true true true true true
READ: tstep max max max max max
READ: PWM thresh.
READ: [mm/s]
READ: OT prewarn false false false false false
READ: triggered
READ: OTP false false false false false
READ: pwm scale sum 3 3 3 14 3
READ: pwm scale auto 0 0 0 0 0
READ: pwm offset auto 36 36 36 36 36
READ: pwm grad auto 14 14 14 14 14
READ: off time 4 4 4 4 4
READ: blank time 24 24 24 24 24
READ: hysteresis
READ: -end 2 2 2 2 2
READ: -start 1 1 1 1 1
READ: Stallguard thrs
READ: uStep count 24 24 24 24 24
READ: DRVSTATUS X Y Z Z2 E
EDIT: I think it's actually working. At 200ma Im actually able to move the steppers even while they're holding. Wasn't able to do that before.
Edited 3 time(s). Last edit at 08/02/2021 03:44PM by CVRIV.
