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i was cutting a sample 3d part today just trying things out, roughed it out fine, changed tool and then started finishing. after a few cuts router basically lost position but the motors did not stall, it was as if it missed a couple of lines and then moved on. not sure what happened. anyone got any ideas
Trying to go too fast ?
What do you have acceleration and velocity set to ?
Also who breakout board are you using ?
its a routout cnc breakout board. velocity set to 2000mm/min max. accellleration is set to about 0.25 seconds. the rest of the progrm ran fine it was just this one bit that did it so i don 't think the velocity/acceleration is a problem hopefully
feed in the program was 1500mm/min
Velocity and feed sound reasonable but acceleration sounds very high, might not be able to have time to move, try increasing the time.
One way to see if it's going to stall is run something like this:
G61
G0 X0 Y0
G0 X100 Y100
G0 X0 Y0
G0 X100 Y100
G0 X0 Y0
G0 X100 Y100
G0 X0 Y0
G0 X100 Y100
etc...
Doing that clearly moves X and Y at maximum feed, then reverses ... so if the acceleration is wrong that's quite likely to stall it. My machine used to stall if I ran that code at 8m/min, then I changed the computer to a better one and it'll do that at 15m/min without stalling.
Best to put a G21 on the top line in case he's from the States :lol:
Nah, that'd be his own fault for using silly units and not having limit switches!Quote:
Originally Posted by John S
LOL !!:wink:
npe i'm from uk, cornwall and i do have limits so it won't matter any way. i'll try turning the accelleration down a little.thanks