I already have more project then I can do but...
A while back I posted about a guy who figured out how to connect an inexpensive digital caliper to a PIC.
At school we have a loft of dead computers junk that includes a few printers. I was thinking that one could salvage the carriage and drive motor from two printers to make the XY table for CNC drilling PCBs. Connect one caliper to each axis for feedback.
The drive motors I have seen are brushed DC motors that one could drive with an H-Bridge. The motor drives a toothed belt without gear reduction. With some amount of work one should be able to come up with software. The hard part would be driving the motor such that you did not over or undershoot the desired position. Perhaps on would need to replace the motor with a gear reduction motor aka gearmotor.
I do not know a lot about PID but I think most algorithms are intended for use with continual feedback. The interface only provides 3 reading per second. It could be interesting.
What do you think?
A while back I posted about a guy who figured out how to connect an inexpensive digital caliper to a PIC.
At school we have a loft of dead computers junk that includes a few printers. I was thinking that one could salvage the carriage and drive motor from two printers to make the XY table for CNC drilling PCBs. Connect one caliper to each axis for feedback.
The drive motors I have seen are brushed DC motors that one could drive with an H-Bridge. The motor drives a toothed belt without gear reduction. With some amount of work one should be able to come up with software. The hard part would be driving the motor such that you did not over or undershoot the desired position. Perhaps on would need to replace the motor with a gear reduction motor aka gearmotor.
I do not know a lot about PID but I think most algorithms are intended for use with continual feedback. The interface only provides 3 reading per second. It could be interesting.
What do you think?