search

Klipper3d / klipper

Klipper is a 3d-printer firmware
GNU General Public License v3.0
9.55k stars 5.33k forks source link

Steppers stopping some time into the print #2282

Closed DBa2016 closed 4 years ago

DBa2016 commented 4 years ago

Since few days (without changes made to soft- and hardware), some time into the print, the steppers just stop moving. I see the printer accepting commands (in the Octoprint "Terminal" tab) and reporting back temperature, but none of the steppers seem to move.

This happens sometimes 2 hours after the print start, but sometimes 24 hours after start (in a 50-hour print...).

A "restart" in the terminal window makes the stepeprs move again (but this of course interrupts the print).

Stepper drivers are TMC5160 (all of them), working fine since summer this year.

Log of the last print failure is attached, I issued a "dump_tmc" on all steppers after I noticed the last failure - however I cannot decypher the dmp_tmc output. klippy.log

KevinOConnor commented 4 years ago

Your driver is reporting an undervoltage error which looks a little suspicious. The tmc spec describes this as: Indicates an undervoltage on the charge pump. The driver is disabled during undervoltage. This flag is latched for information.

Beyond that, I don't see anything that looks abnormal in the log.

-Kevin

DBa2016 commented 4 years ago

Hmmm - wondering how "undervoltage" could happen there... Board failure possible? MKS GEN L on 24V...

DBa2016 commented 4 years ago

More accidentially than really by intent, I discovered the Watterott 5160s have RSense 0.075 Ohm (unlike 0.11 Ohm for other drivers). Changed that and printing again, let's see where we get...

DBa2016 commented 4 years ago

That did not really change the behavior. However, I noticed that after mid-print stop, the drivers show „overload a“ and „overload b“ in the drvstatus flags. Could that be something?

KevinOConnor commented 4 years ago

Alas, the trinamic drivers are quite intricate. You'd need to read the trinamic specifications to know the implication of that flag being set.

-Kevin

KevinOConnor commented 4 years ago

I'm going to close this as it looks like the conversation has concluded. The trinamic specifications are the best source of information on the behaviour of the trinamic drivers.

-Kevin