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system_troubleshooting.md

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System Troubleshooting

Lights Flickering with Bed Heater

This is caused by crappy wiring in your house + the bed heater being on. By default the heater is using a PID algorithm to keep its temperature at the set value -- this switches the heater on and off quickly (a bigger VORON has 700W+ mains heater; a 300mm V2 can pull 6-8 Amps at peak load, which can overload a circuit if there is too much else going on), this causes the flicker in your home electrical network.

In the [heater_bed] section make the following changes:

  • If line power is 60Hz, add a line pwm_cycle_time: 0.0166
  • If line power is 50Hz, add a line pwm_cycle_time: 0.02

OctoPrint Serial Timeout

OctoPrint has built-in timeout for the internal serial connection to Klipper. Some of the macros such as PRINT_START can take a long time to execute and cause Octoprint to disconnect. Instead of increasing the timeouts, add one or more of the macro names to the list of long-running commands.

The long-running commands can be found under 'Settings' -> 'Serial Connection' -> 'Firmware & Protocol'. Then under 'Protocol Fine Tuning', expand the 'Advanced' section to locate the 'Long Running Commands' list.