by gavztheouch » Fri Jul 27, 2012 10:35 am
After tweaking, postional error in the servo motor is now down to 20 pulses when engraving using the y-axis. This is from a starting error of 160 pulses before tweaking.
With 5000 pulses per rev and a pitch of 20mm thats 0.004mm per pulse, making 20 pulses 0.08mm
Starting to make some progress and hopefully the servos can be tuned better than it is now.
The next job is to staighten the ballscrews as at least one has been bent out of shape quite badly. After that I need to look at improving the x-axis. Currently im using a mxl pitch belt over about 1.4m of total travel. I reckon this would benifit from a wider and larger pitched belt. Mabey 3mm HTD 15mm wide.