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IDEX Toolchange Deretraction
Hi all, I am trying to do a multi material print with my vcore4 in IDEX, T0 = PETG @ 260C and T1 = PA6 w/ carbon fiber @ 285C. I quickly discovered that T0 will not properly extrude after resuming printing following a tool change. The extruder makes clicking sounds and doesn't extrude for maybe 5 seconds before resuming normal extrusion. T1 doesn't do this after resuming, I'm guessing because the carbon PA6 is less sensitive to heat creep.
I initially tried various wipe tower settings with mixed results but that doesn't address the root cause of the extrusion issue. I also tried lowering the T0 temp from 260C all the way to 230C and the issue was still present.
After some research it seems that this is due to heat creep and can be addressed with a ~20mm retraction before the tool head is parked. I changed the default IDEX macro settings in printer.cfg for retraction/deretraction to 20mm, but it did not fix the problem due to the tool change deretraction happening immediately after the tool head is parked, rather than immediately before resuming printing as expected.
As a workaround I'm thinking I could set the IDEX retraction to 20, deretraction to 0 and then add custom gcode to deretract in Prusa Slicer every time T0 resumes printing.
Has anyone else encountered this issue with IDEX tool changes? Appreciate any help!
I initially tried various wipe tower settings with mixed results but that doesn't address the root cause of the extrusion issue. I also tried lowering the T0 temp from 260C all the way to 230C and the issue was still present.
After some research it seems that this is due to heat creep and can be addressed with a ~20mm retraction before the tool head is parked. I changed the default IDEX macro settings in printer.cfg for retraction/deretraction to 20mm, but it did not fix the problem due to the tool change deretraction happening immediately after the tool head is parked, rather than immediately before resuming printing as expected.
As a workaround I'm thinking I could set the IDEX retraction to 20, deretraction to 0 and then add custom gcode to deretract in Prusa Slicer every time T0 resumes printing.
Has anyone else encountered this issue with IDEX tool changes? Appreciate any help!
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