Printer freezes for about a second


#1

Comrades, tell me! Printer Ultimaker 2 clone, firmware Marlin
There was such an ambush, during printing the printer in an arbitrary place freezes for about a second, because of which blobs form on the surface. Previously, this appeared when printing from a computer, switched to raspberry and octoprint, and I print six months without any problems. And the same problem appeared again. I think it can reduce the speed of exchange with the port? Is it still possible to increase the cache size in octoprint?

I changed the USB cable, changed the firmware to the Ultimaker, I have fewer delays, but they areoctoprint.log (258.9 KB)


#2

You might want to read through this and this.

Also, it looks like your Raspberry Pi has an undervoltage condition. You might want to get a good 5V 2.5A or more power adapter or at least troubleshoot that as a first step.

You've got things like this going on with your printer just not responding:

2019-03-22 12:05:56,575 - octoprint.util.comm - ERROR - Unexpected error while reading from serial port
Traceback (most recent call last):
  File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint/util/comm.py", line 2605, in _readline
    ret = self._serial.readline()
  File "/home/pi/oprint/local/lib/python2.7/site-packages/octoprint/util/comm.py", line 4681, in readline
    c = self.read(1)
  File "/home/pi/oprint/local/lib/python2.7/site-packages/serial/serialposix.py", line 501, in read
    'device reports readiness to read but returned no data '
SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)
2019-03-22 12:05:56,577 - octoprint.util.comm - ERROR - Please see https://faq.octoprint.org/serialerror for possible reasons of this.
2019-03-22 12:05:56,585 - octoprint.util.comm - INFO - Changing monitoring state from "Operational" to "Offline (Error: SerialException: 'device reports readiness to read but returned no data (device disconnected or multiple access on port?)' @ comm.py:_readline:2605)"