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Messages - ziga

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General Mach Discussion / Re: how to fit servo mottors?
« on: September 03, 2007, 03:43:53 PM »
so if i understand this corectly speed of servo motor is defined by frequency which you get from step pin?, but wat if you have to stop the motor how does the controler determin when the step pin goes low, it culd just mix it up with the frequency low impuls?

General Mach Discussion / Re: how to fit servo mottors?
« on: September 03, 2007, 12:52:47 PM »
jes it is true i culd put a bigger stepper mottors, but i wuld like to experiment how my machine wuld work under servo motors, since they generate biger torq, i culd than use the feadback to equipt bigger machine ( i happen to have an old shublin machin from i dont know wich year and it has a very old computer)

General Mach Discussion / Re: Lost Step on complex program
« on: September 03, 2007, 10:42:42 AM »
I think you shuld try fitting encoders. maybe your hardware cant keep up with the speed of your program, try runing it on lower speeds.

General Mach Discussion / how to fit servo mottors?
« on: September 03, 2007, 10:23:35 AM »

I have an old cnc mill machine. I wuld like to throw away my stepper moters and fit on it servo dc or ac motors i havent decidet jet.
I wuld like to put mach software on it.
I know thet servo motor needs 2 inputs, direction and frequency to tell it how fast it must turn. and an encoder givs to computer the information how much did it moved for real, and in wich direction it moved for real. When a machine have to make a sharp turn, it still have some moment and it still is moving in another direction, that culd be a problem couse it culd make a little mistake and if you doo a loot of sharp turns it culd end up as 1 big mistake(or so i think)
couse when i was using stepper motors it was jumping steps, so i figured that culd be the problem or that i wanted too mill  too hard metal.

My question is where can i read more on what output mach software gives i was looking over the manual and ther were detail info for stepper motors, but no detail info for servo motors, or does the step pin determin frequency and you just verify it with motor?

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