Dual motorised nozzle

Amagatth

Hi all ,

Anyone have already set a système who have xyz standard on cartesian config but with 2 aditionnal Z for extruder so 2 extruder on the same carriage when you call t0 first extruder Go down and second stay at the top and when you call t1 second Go down and first Go top.

Need to creat 2 additionnal axis u and v right ?

cosmowave

@Amagatth
Are these additional axes driven by steppers? And do you like to control them independent? Then you need 2 additional axis.

Amagatth

@cosmowave yes 2 axis more on the X cariage to up and down each nozzle , u and V can be drive in G code when ask tool 1 or tool 2

cosmowave

@Amagatth
Yes, correct. There are some "toolchange macros". In these macros, you can drive your additional u and v with gcode.
Read more about toolchanging:https://docs.duet3d.com/en/User_manual/Tuning/Tool_changing

jens55

Just as an additional thought - how about mounting the extruders on a single plate with a swivel point in the middle. The idea is when one nozzle goes down, the second one goes up ... and vice versa. I am pretty sure that I have seen this kind of arrangement in a commercial setup before but I have no clue where I saw it. It was quite a while ago. The point being that you save some weight.

engikeneer

@jens55 that's on the Raise3d Pro I think

Amagatth

@jens55 i want to fully independate axis to have a hight precision

droftarts

@Amagatth There are other users that have tools on separate Z axes. See these threads, though some are a bit old now:
https://forum.duet3d.com/topic/18051/printer-with-two-independent-z-axes-how-to-synchronize
https://forum.duet3d.com/topic/16609/multiple-z-axis-and-complex-tools-possible
https://forum.duet3d.com/topic/7590/interested-in-using-two-z-axes leading to https://forum.duet3d.com/topic/14034/thank-you-for-helping-me-build-this-2-color-clay-printer
https://forum.duet3d.com/topic/2443/dual-z-for-idex user @stephenc has a lot of info about setting up his Zidex, though from a few years ago

See my post here for a bit more info on controlling them, though they generally only move the tools in Z, not the bed as well, but I expect something similar would work for you: https://forum.duet3d.com/post/302193

@jens55 the Makertech Dual Switching hotend v2.1 was mentioned recently: https://forum.duet3d.com/topic/36420/connecting-the-servo-of-a-dual-switching-hotend
I think Stratasys used the 'seesaw' method, and I've seen some versions on Thingiverse et al that bump the end of the axis to switch.

Ian

Amagatth

@droftarts Thx