I cant change the current of extruder driver

General Discussion
1

Hi,

Something strange is happening to me… I want to increase the current at which the driver that controls the extruder works…

I indicate the steps that I am following, so that you can tell me what I am not doing well.

01- Find out the current to which they are configured, for this in Mainsail, I download the *.log of klipper, I examine it and I see that: “[tmc2209 extruder] run_current = 0.707”
02- I open the “printer.cfg” file, I examine the configuration files that are included in printer.cfg, until I find that the line [tmc2209 extruder] run_current = 0.707, is in the Orbiter1004.cfg file.

03- I edit that file, Orbiter1004.cfg, and indeed there is the line [tmc2209 extruder] run_current = 0.707, which I change to [tmc2209 extruder] run_current = 0.900.

04- I save the changes and restart.

05- I edit the file Orbiter.cfg, to check that [tmc2209 extruder] run_current = 0.900, that’s right, it’s changed.

and…

06 - I download the *.log of klipper again, I look for the current configuration for that motor, the extruder… AND IT HAS NOT CHANGED, it is still “[tmc2209 extruder] run_current = 0.707”

I have repeated the procedure several times, and nothing.

What am I overlooking?

2

Can you share the klippy.log?

3

klippy (5).log (2.1 MB)

add config lines

[tmc2209 extruder]
interpolate: true
uart_pin: e_uart_pin
run_current: 0.901
hold_current: 0.1
stealthchop_threshold: 0
driver_TBL: 1
driver_HEND: 6
driver_HSTRT: 7
driver_TOFF: 4

4

Have you looked at the very end?:

[tmc2209 extruder]
interpolate = true
uart_pin = e_uart_pin
run_current = 0.901
hold_current = 0.1
stealthchop_threshold = 0
driver_tbl = 1
driver_hend = 6
driver_hstrt = 7
driver_toff = 4

The printer.cfg can appear multiple times in the log.

1 Like
5

Thx, solved.

The old trick that read all…

There is some command in console, to check the configuration of the drivers in real time?

6

You can read the TMC status with a command:

But the currents are display in a different format.
The registers for current can’t be read as values because they are write-only registers.

More on the staus data is in here: TMC data sheet