Hi,

I own a Makerbot Replicator 2 and upgraded it with an aluminium heatbed with glas plattform, a hood and acrilic "windows".
When I use PLA everything works fine, but today I used ABS for the first time and got a strange "zig zag" pattern.
After about a minute it extrudes normal again. I tried out different heating settings, but couldn't figure out why this happens.
My settings:
Extruder 225C
Platform 100C
Has anyone experienced this before?

Thank you,
Thomas
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