Originally Posted by hobbycnc What voltage are you using with what steppers? Performance seems awful low.
Dave Rigotti
HobbyCNC.com |
Dave: Using a 28V P/S. 15A
ger21: P
H296-02 steppers that are 5.5V 1.25A. They are rated at 174oz holding. If you have a link to the torque curves, let me know.
Strat. The error shows in the DI not what the software indicates. Software is functiong fine. I won't rule out bent lead screws or screw error but they were new Roton stock and I turned the ends in a Hardinge collet lathe. Roton hand fitted the ballnuts. Using motor oil for lube, not any heavy grease. I have a teflon light white grease I'll apply when I'm done. Oh, I made new gib strips from Si/Al bronze.
When I"m checking the backlash, I just set the jog increment to .0005 and jog left & right & tweak the software until there is ever so slight movement in the needle. (.0001" or less) I'll stick a DTI on it and fine tune it better than that when I've worked the other bugs out.
I did have my feed rate in the test program set to F10. It seems that the letters like 'S', 'G' that had alot of interpolation were the ones getting compressed. That error had to be missed steps. Haven't run the program since I've been playing with reduced speeds. Does the accel rate get taken into account on every move? I didn't have any success with the G28 Home command and it may be because the Max speed was too high and the Start & Accel don't get taken into account on a G28 command?
Thanks for all the help folks!