BondtechAB/Bondtech_Prusa_i3

Unload filament MK3 prusa3d_fw_MK3_3_5_1.hex

Closed this issue · 3 comments

Dutchy-79 commented

Hi Martin, (and other guys?)

I'm pretty happy with the print quality with the new Bondtech MK3 kit though there's one major thing.
When I unload filament it stays between the gears and if you are too slow opening the hatch it can get stuck inside.

For example, I unload PLA but want to load PETG so I heat up to 230C and hit unload, The it reverses quite slow (In my opinion which could be based on sound too much) and then it askes me to pull out quickly, Though it's stuck between the gears so you can almost lift the printer on it and the PLA starts to cool already.

What should I change (or can you ask Prusa to make a Bondtech option in the menu)

Regards,

Jasper

Dutchy-79 commented

I did some rough measurements and the gears on this version are about 5mm higher up in the design so instead of 70mm unload we should need 75mm unload command.

Dutchy-79 commented

Also the unload sequence seems slower.

Dutchy-79 commented

The mighty @codiac2600 aka Chris Warkocki made some firmware changes to improve unload.
https://github.com/codiac2600/Compiled-Firmware