Error message: Unable to read tmc uart 'stepper_x' register IFCNT

[JNRAY]

Hello,

I have installed a Manta M8P on my old CR-10 Max printer.

When I try to home my motor I get the message: Unable to read tmc uart ‘stepper_xyz’ register IFCNT.

I have run the following command: DUMP_TMC STEPPER=stepper_x

and I get the following message:

Unable to read tmc uart ‘stepper_x’ register GCONF

========== Queried registers ==========

SGTHRS: 0000007f sgthrs=127

TPOWERDOWN: 00000014 tpowerdown=20

TPWMTHRS: 00000000

IHOLD_IRUN: 00081919 ihold=25 irun=25 iholddelay=8

SLAVECONF: 00000200 senddelay=2

========== Write-only registers ==========

DUMP_TMC STEPPER=stepper_x

You will find attached my configuration file and the Klipper log;

Thank in advance for your help.

CR-10_Max_v3.cfg (9.0 KB)

klippy.log (3.1 MB)

[mykepredko]

Can you share how you set the jumpers on the Manta M8P (ideally with pictures) for the X Axis driver with the TMC2209?

[JNRAY]

See attached picture on the A Axis driver, I have removed the TMC2209 to beetle see the jumper. I have on jumper in position 2 upper and one for the sensorless homing.

I forgot to say it is a M8P V2 and I have the same issu for all axis and the extruder.

[Sineos]

Not sure from the picture, but is the jumper for motor voltage selection missing?

[mykepredko]

Good eye - you’re right.

[JNRAY]

Thank for your answer.

I did not put the jumper for voltage selection.

I have understand that, if I power only the the power connectors I need to put a jumper on vbb (right side). Then I could remove the connection between power and motor power connectors.

[mykepredko]

You have to have a jumper placed for each motor driver no matter what.

From the user manual, you can select to use the motor power or the board 24V power using a jumper on the left two or right two pins for each motor driver:

For your situation, I would recommend just adding a jumper in each position and leave the wiring as is.

[JNRAY]

Thank for your support. All is working now.

I will continue to check my configuration using the Klipper manual