Bridgeport Manual to CNC conversion...

[Davek0974]

Ok, what sort of acceleration should i be aiming for if i have a top speed of 3500mm/min and bearing in mind this is a Bridgeport with a fairly heavy table;)

[JAZZCNC]

Ok, what sort of acceleration should i be aiming for if i have a top speed of 3500mm/min and bearing in mind this is a Bridgeport with a fairly heavy table;)

I'd up it until starts stalling motors then back it off 25%. 750s/s would be nice figure to aim for.

[Davek0974]

Ok, i'll try upping it but it would not stall - it has some fairly big AC servo's on it and a 2:1 reduction so damage would occur first i think or drive shut-down maybe.

[JAZZCNC]

Ok forgot you have servos But same applies really however instead of stalling you'll get position errors or drive trips.! . . . You'll know if OTT

[Davek0974]

Ok I'll dive in tomorrow night, thats the thing with servo's - you have to set an acceleration and top speed then tune the servo drive, it takes a fair bit of time to do each axis.

[Boyan Silyavski]

But left side corners are undercut and right side corners are overcut, from what i see. So i dont think its the acceleration. What does that tell? To me- mechanical play.

[Davek0974]

no, the corners are "dog-boned" or "T-boned" to get a square object in there.

maximum play is 0.04mm on any axis.

[JAZZCNC]

But left side corners are undercut and right side corners are overcut, from what i see. So i dont think its the acceleration. What does that tell? To me- mechanical play.

That tells me you know nothing.! . .