The Shop > CNC
CNC painting system, another silly idea?
vtsteam:
Sounds pretty! :clap:
um, but this thread is about the machine doing the painting. :)
John Hill:
I spent all day yesterday working on a futile arrangement of MDF discs and wires (fishing trace). The MDF material was totally unsuitable and the trace wires would not play the game. So I pulled it all apart to salvage a few bits and start again.
Version two will have sprockets and chain to keep the moving arms synchronised.
vtsteam:
Suggestions: sliding glass door track pulleys, and fine stranded coated bead cable available at craft stores/places that sell beads for stringing into necklaces.
John Hill:
Thanks, I will keep that sliding door hardware in mind.
John Hill:
I have not abandoned this project, not yet anyway! Right now I am battling poor quality stepper drivers.
The John Deere stepper had only limited travel and is put aside for the time being....
The brush dipping mechanism has been knocked up and the basic movement is OK, I just have to get the stepper driver to do it's assigned function..
When the chain is routed around the motor pinion the three cranks move and the potentiometer driven by the fourth sprocket will limit the travel to about 200 degrees left or right.
A board over the three cranks will carry the paint brush. At one end of the travel the brush will be on the work and at the other it will dip in a paint cup.
The brush will be attached to a vibrator for a quick shake to release excess paint as the brush rises out of the paint and a more gentle shake while painting to encourage consistent paint flow.
Well, that's the plan anyway!!:)
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