The printer was working fine yesterday, but today the mixer decouples during the print-start homing sequence on 3 different print tanks (each with a different mixer). It can travel the full length fine when the right side is in the lowered position, but before homing the right side of the tank actuates up, and when the mixer goes to the right it decouples every time. I’ve cleaned the tanks and mixers, made sure there’s no resin on the foot pads, ran the mixer calibration, I even removed the LPU to inspect the magnet lifter arms which look fine. Any ideas??
Hi @liortdo ,
Thanks for letting us know about your issue! It was very helpful to know that you have already tried several tanks and recalibrating the tank mixer sensor. The next step to try would be replacing the mixer coupler motor. If your printer is out of warranty, and you’re within our shipping zone, you can purchase this part directly from Formlabs. (SKU: RP-F3L-MXMR-01) If your printer is in warranty, please reach out to our Support team. See our repair guide here.
Thank you! That repair guide was very helpful. I re-opened up the LPU housing, removed the motor and gave it 12V and it worked well, but I noted that the magnetic coupler was still catching even with the motor removed. I then removed the top plate with the glass strip, and was able to see that the pin holding the magnets in on one side had slipped out and maybe worn a groove into the aluminum housing? This was mentioned in another repair guide (https://drive.google.com/file/d/1R6M0z4-5SUrEhgKLfYQk5A-V5TxcQU3S/view), but I hadn’t been able to see it from the bottom. I pushed the pin back in and applied a drop of super glue, which will hopefully hold it (in the picture the pin has already been pushed back in). When I started the machine back up it made a nasty grinding sound, but after running the Mixer Calibration we’re back in action. Thanks again!
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