Motor Sync and Idler calibration
I have an issue, out of the box after installing MMU2s on perfectly functional MK3S+.
Problem 1: First of all, idler does not align properly for feeding filament 1. The selector aligns correctly, and pulley turns in correct direction for loading filament. After manually repositioning idler, filament 1 will load to nozzle.
Problem 2: It appears that firmware does not sync the MMU pulley motor to the extruder motor.
2a. They turn at different speeds during load to nozzle.
2b. During 1st layer calibration they do not turn at the same time and sometimes even turn in opposite directions, leading to filament grinding and missed steps.
I have not made it past 1st layer calibration and am nearly ready to return MMU. Am I missing something with regard to my expectations of motor synchronization?
RE: Motor Sync and Idler calibration
I have an issue, out of the box after installing MMU2s on perfectly functional MK3S+.
Problem 1: First of all, idler does not align properly for feeding filament 1. The selector aligns correctly, and pulley turns in correct direction for loading filament. After manually repositioning idler, filament 1 will load to nozzle.
This is key. You have to align the groove on the gears with the filament. Photos might help us help you.
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Chuck H
3D Printer Review Blog
RE: Motor Sync and Idler calibration
Can you show some pictures of what happens when you try to load the filament? Do you use the MMU buttons or the LCD to load to filament.
The printer and MMU extruder motors run at different speeds during loading. The MMU turns faster to push the filament to the extruder. The Printer extruder motor turns slowly just waiting to receive the filament from the MMU. As soon as the ir sensor detects the filament between the Bondtech gears the MMU stops loading.
But if the ir sensor never detects the filament, the MMU will pull it back.
If the ir sensor isn't adjusted correctly the Bondtech gears will grab the filament as expected but the MMU thinks the load failed and tries to pull the filament back.
Recheck/adjust your ir sensor.
Before you think about returning the MMU you should contact Support to let them help you troubleshoot.
Log in to the Eshop and the chat button should appear in the lower right corner of your screen.