How to adjust the current of the heater connected to OUT0

[Dennis_kim]

used Duet3_mb_6ch_v1.02
POWER IN 23.7V
OUT0 POWER IN - 23.7V
FIRMWARE_NAME: RepRapFirmware for Duet 3 MB6HC FIRMWARE_VERSION: 3.4.0 ELECTRONICS: Duet 3 MB6HC v1.01 or later FIRMWARE_DATE: 2022-03-15 18:57:26

Two heaters of the same type are being used.

One is connected to OUT0 and one is connected to OUT1.

I tuned both heaters to M303.
OUT1 reached 100 degrees quickly (it took about 5 minutes), but OUT0 returned the message "Auto tune canceled because target temperature was not reached" at 90 degrees.

The voltage is higher in OUT0, but I wonder what the difference is.

Is there any command to adjust the current of OUT0?

P.S. I don't know how to reply to a post... Sorry for posting something similar

[droftarts]

@Dennis_kim said in How to adjust the current of the heater connected to OUT0:

Is there any command to adjust the current of OUT0?

No. The current (I) draw is set by the resistance (R) of the heater, and the supply voltage (V), in the equation V=I x R. So I = V/R

Check the resistance of the heaters using a multimeter. What voltage are you using for each heater?

P.S. I don't know how to reply to a post... Sorry for posting something similar

You probably need to confirm your email address, which is required to reply in threads. Please don’t spam the forum with multiple new threads.

Ian