Hi!
I´ve come onto a problem that as a relative beginner has me baffled ; (.
I´m milling polistrirene foam, quite quickly, on a home built machine thats X axis is 13 feet long, Y axis 2 feet 4 inches and Z 35 inches. (4000mm x 2000mm x 900mm aprox).
I´m using Easy Steppers, by Leadshine, NEMA 34, ES_MH33480, which give 8Nm,with encoders, driven by ES DH 2306 Hybrid Servo Drivers.An economical alternative to servos.
I tend to give feed rates of 12000mm per minute in DESKPROTO, the software that generates the g codes. I then vary the feed rate in the MACH3 screen, depending on the area being milled, often way above 100%.
I´ve discovered that if I speed up above a certain rate, much lower than the machine is capable of delivering, the distance travelled in both X and Y axis is not accurate ; (.
But the machine does not loose steps nor position (due to the encoders) as I can G0 X0 Y0 Z0 and it goes back perfectly to the work piece zero point.
If I then decrease % speed, again on the MACH screen, it reverts to correct travel, and milles the piece with the desired form.
I´ve yet to try changing to another computer, it has XP installed.
If I manually instruct for example, G0 x 2000mm, it goes perfectly there, even though the speed percentage is quite high. G 0 X 0 and it come back perfectly.
Anyone any ideas?
I made a short video, I´ll try and post it.
Thanks in advance,
Frank.
www.franknorton.comPS This is a second attenpt to upload this Post, hope I´m not repeating it; )