Feasibility for Duet 2 to run as all-in-one 3D and CNC
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Hello,
I have been thinking of this for a while now and seeing as the Duet2 with the expansion board will allow 7 extruders.
What if you would be able to create a dual extruder (one nozzle for ABS/PLA Model Plastic and the other as support material)
Then when the model is completed, the 3/4/5 axis CNC does an outer layer finishing.
What do you guys think, is this possible and is there such a feature available in the firmware to allow this?
Mo
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Yes the firmware could support that.
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@mohala The Fimrware can switch between 3d printer mode and CNC mode on the fly. In reality these are similar however the CNC mode has functionality such as spindle speed control. Have a look here:
https://duet3d.dozuki.com/Wiki/Gcode#Section_M451_Select_FFF_Printer_Mode
https://duet3d.dozuki.com/Wiki/Gcode#Section_M453_Select_CNC_Printer_Mode -
Sounds possible with the Duet.
However... I'm of the opinion that the mechanical setup for 3D Print vs. CNC often has different goals in terms of force vs. speed vs. precision, etc, etc. Again, just an opinion, free and worth every penny. I think this is why we don't see many combo machines (there are a few). Put another way, the CNC goals must be very modest in terms of material, cut, speed.
Again, sounds possible from a firmware/controls perspective, and sounds like the Duet is very close to being able to do it.
It would be great to see a well working machine that does this! Keep us posted.
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@danal said in Feasibility for Duet 2 to run as all-in-one 3D and CNC:
However... I'm of the opinion that the mechanical setup for 3D Print vs. CNC often has different goals in terms of force vs. speed vs. precision, etc, etc. Again, just an opinion, free and worth every penny. I think this is why we don't see many combo machines (there are a few). Put another way, the CNC goals must be very modest in terms of material, cut, speed.
I was tempted to respond in a similar way. However, the original post makes it sound that the CNC aspect will only be used to improve the surface finish of the 3D print. So it shouldn't need to apply much force or be very fast.
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There a a few industrial 3d printers of various sizes that do something similar. The largest used a robotic arm and the smaller had a rotating build platform. They printed the object and then trimmed it down. It only takes as much force as is needed to mill a few microns off of the surface of an abs print.
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Here's a video of the big one in action.
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Cool! Finishing could very well be in a "sweet spot" of forces and speeds.
Looking forward to more... keep us posted...
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Here's another really good example of a tool changer combining printing and machining. https://www.youtube.com/watch?v=IZ82_L6UmzQ
I'm not certain but it looks like they are using Duets. The touch screen looks like it has the DWC displayed on it.
Yup, they're using the Duet. https://www.diabasemachines.com/technology
