Closed 6ffm70 closed 4 years ago
More Analysis: locating the wire break in the cable
Repair hack: Parts required: 5x cable ties 2.5mm, 4x wire end sleeves, heat shrink hose ø3mm, ø6mm as required Tools required: wire stripper 4mm², 0.25-0.4mm², copper wire shear, end sleeve crimp pliers (open type) 0.5mm² *alternatively a heat controlled soldering iron and soldering wire
The hotend cables on the Prusa Mini are very short and stressed which could potentially have damaged your wire quicker than expected.
I made a fix for those too short cables in case you want to solve it: https://www.thingiverse.com/thing:4065410
More follow up:
Hi @6ffm70 , we sended replacements with new MINDA type and improved cable holder, wich solving this problems. If you still have this kind of MINDA issue please contact our Tech Support. Thank you.
Hello @JohnnyDeer, can you please elaborate on what is meant with new MINDA type? I've had a couple of MINDAs replaced by tech support, and they all showed similar symptoms, even with the improved cable holder.
Follow up: new MINDA details added here: https://github.com/prusa3d/Original-Prusa-MINI/blob/master/DOCUMENTATION/ELECTRONICS/mini-minda.pdf
Description: 4x4 point mesh bed leveling does not finish as expected. When process starts, MINDA light is off; probing pos. 1 - the print head moves up (couple of mm) probing pos. 2 - the print head moves up (couple of mm) probing pos. 3 - MINDA light switches on, print head moves down, then up; here the process halts.
When moving the X-axis, the MINA light switches on in a position further away from the extruder; and switches off approximately at the same position when moving back into direction of the extruder.
This behaviour is reproduceable. With every go, the Z-Axis moves further up by a couple of mm.
Analysis: with the printer switched on, the MINDA light on or off, moving the MINA cable by hand makes the MINDA light flicker.
Assumption: at least one of the conductors in the MINDA cable is broken after ~30 hours of operation.