Rat Rig Community [Unofficial]RRC[
Rat Rig Community [Unofficial]•6mo ago•
10 replies
latebrake417

First layer squish increasing with time VC4 500

I'm currently several months into trying to troubleshoot this issue with not much progress. The first layer appears to be creeping closer and closer to the build plate as the print continues. Eventually the nozzle will actually contact the build surface. I don't experience this issue with smaller first layers that print quickly.

First attempt at a fix was to clean the nozzle and redo the beacon calibration, but this didn't appear to help.

Second attempt was to double check all fasteners on tool head to make sure it wasn't loose. Still no improvement.

I thought this may be related to the known thermal bimetallic effects on the gantry, so I attempted to heat soak for approximately two hours before printing. This seemed to help slightly. The nozzle did not migrate towards the bed as fast as it did in the past, but ultimately the behavior was similar.

I'm at a loss for what steps to take next. Aside from this one issue, I've been thrilled with the printer's performance.
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