If you are interested in using a purge bucket instead of a purge tower on an Ender 3 check out Thingaverse.com things 5157145, 5159657, and 5008568. I think a purge bucket is much easier and less waste if you are willing to work with the Gcode and firmware. For more info check out all of the comments and replies under each thing including tips for the Gcode and firmware.
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To see this working, head to your live site.
Edited:Â Oct 03, 2022
Purge bucket instead of purge tower
Purge bucket instead of purge tower
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These are great!!! As for the Y axis switch... we've also added a mount for the standard Y axis mounting as well in our standard switch mount Tinkercad page, except it mounts on the right side. (See here: https://www.tinkercad.com/things/gKUJcjUSDCW-3dchameleon-endstop-mount) Also, we have a way to go past the edge without needing new firmware. All you need to do is go to your limit minus 10 mm... then halve the X axis steps per mm... move 10, which will actually move 20mm (due to the 2x movement of the steps per mm change) and then move back 10... then reset the steps per mm. Here's an example: G0 X220 F2000 ; go to the real 220 M92 X160 ; double the steps per mm for the X axis G0 X230 F4000 ; move to virtual 230, but really move to 240 (speed is doubled too to keep the same speed as before)
; do purge here
G0 X220 F2000; move back to the real 220
M92 X80 ; reset steps per mm back to stock and resume print
This works on most marlin implementations... but not all for some reason.
Bill