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How to Stop "Double Pump" on Filament Load?  

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jmone
(@jmone)
Reputable Member
How to Stop "Double Pump" on Filament Load?

The current behaviour is that when a filament is loaded (all the way to the Nozzle), it is then retracted 10cm (or so) and then reloaded.  I need to stop or adjust this behaviour (I'm using a Mosquito Hotend) as the first load action is fine, but the 2nd one tends to fail giving me a MMU2s Load Error.  This seems to be (as you can see in the pics) as the new filament is driven into the melt zone on the first movement and then during the 2nd retract/load movement it is all deformed.

Any hints on where the Settings/GCODE that controls this Double Pump (or Length of the Double Pump) is located within Prusa Slicer?

Thanks

Nathan

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Posted : 19/07/2019 12:08 pm
Dave Avery
(@dave-avery)
Honorable Member
RE: How to Stop "Double Pump" on Filament Load?

its in the firmware . it done to validate the load , it loads to hotend and then retracts slightly less that it moved to load and checks that the filament is still loaded, then reloads and starts printing. if your bondtech to hotend distance is different you will need to modify the firmware to account for the difference

Posted : 19/07/2019 1:11 pm
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