Moving several axes simultaneously - XYZ and UVW

[Salvatore]

Hello everyone,

I have built a 3D Bio-Printer and I use XYZ to move the end effector of the printer which extrudes bio-materials. At the same time, I need to control UVW in a different way and at the same time, I use UVW to control the syringe pump as you can see in the pictures, and I might want to control these pumps at the same time as the XYZ process. Is it possible to run a G-code to handle XYZ and UVW at the same time?

For example, I would like something similar.
I could run these two lines

G1 U200 F0.1
G1 U100 V100 F0.1

while these other lines are executed independently for XYZ

G1 X100 Y10 F600
G1 X-100 Y10 F600
.
.
.
G1 X100 Y10 F600
G1 X-100 Y10 F600

Could I do it?

[dc42]

@Salvatore this is possible using the dual motion systems feature, which is available on Duet 3 boards running RRF 3.5. See https://docs.duet3d.com/en/User_manual/RepRapFirmware/Multiple_motion_systems.

[T3P3Tony]

@Salvatore one thing that is unclear to me from your description is if the syringe pumps should be synchronised with the XYZ movement or not?

[deckingman]

......or another approach is to post process the sliced gcode file to add the additional axes moves. That's what I used to do when I ran a CoreXYUVAB.

[Salvatore]

This post is deleted!

[Salvatore]

@T3P3Tony you are right, I was not clear. The the UVW (syringe pumps) are not sinchronised with XYZ movements at the moment. But in the future a will need it.

[Salvatore]

@dc42 thanks so much, I tried to follow this chapter but I had difficoultes to do that. There is an example that can be usefull?

[T3P3Tony]

@Salvatore If they need to be synchronised then rather than using multiple motion systems, you can send:
G1 Xnnn Ynnn Znnn Unnn Vnnn Wnnn Fnnn

in each command

[Salvatore]

@dc42 I wanted to update you that I managed to do everything and the Multiple Motion System is very powerful, thank you very much everyone!