Response Timeout: CAN addr 121 while bed mapping

[AviationGuy]

Hi. Thank you in advance for any assistance.

Printer is configured and operates normally and has for a while, however, there have been some intermittent issues lately while performing bed mapping. The cycle will run a few rows of probing and then popup error with:
"Response Timeout: CAN addr 121, red type 4012, RID=61"
"Response Timeout: CAN addr 121, red type 6037, RID=62"
"Response Timeout: CAN addr 121, red type 4012, RID=63"

Once this happens, the hot end thermistor shows 2000c degrees and the BL touch is flashing and will not respond to pin commands. I have swapped out the thermistor and BL for new parts and the error persists.

Is this most certainly an intermittent break in the CANH or CANL wires or could something be happening with the BL or tool board itself to cause this?

[dc42]

@AviationGuy said in Response Timeout: CAN addr 121 while bed mapping:

Is this most certainly an intermittent break in the CANH or CANL wires or could something be happening with the BL or tool board itself to cause this?

That's the most likely explanation, but there are a few other possibilities:

• Intermittent connection in the power lines
• If you are running the main board and the tool board form different power supplies then you must common the ground sides (i.e. the negative output terminals) of both power supplies
• If the BLTouch is faulty then it could be drawing excessive current and overloading the 5V regulator on the tool board

After the error occurs, are you able to run M122 B121 ?

[ktapper]

@dc42 I am currently having similar issue were going though mapping or after a while of printing. If the BLTouch is causing it. If the board comes back alive after... I should just swap the BLTouch?

[dc42]

@ktapper I don't have anything to add to my reply to @AviationGuy above.