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General Mach Discussion / Servo for lathe spindle ?
« on: September 12, 2014, 09:47:52 PM »
Hi everybody,
I am refurbishing my Wabeco ccd6000 lathe with servos in X and Y axis.
I am just starting to use "servos" for the first time and i am installing 2 Delta ecma servo motors AC to the x and y axis on my old wabeco lathe.The controller is csmio - a with the enc and mpg modules.
For the spindle i would like to improve and change the original motor with either a ac motor driven with a vfd OR a AC servo and driver.The spindle is belt driven so i would like to either use a toothed belt instead of the original one which is not toothed.I have seen servo driven spindles but some people are saying that -apart from spending a lot of money for a servo and driver-by belt there is too much resonance and is NOT going to work(i.e. the connection motor to spindle should be rigid).I would like to be able to have the servo precision and even be able to do rigid tapping (which i thing is only possible with a servo driven spindle).
The original motor is a dc 1400W motor 5000rpm getting reduced by the pulleys to 2300rpm and rpms are adjusted by a potentiometer from 250 to 2300rpm.Or if i want to go lower than that i have to change the pulleys ratio and go from 50 to 500rpm.
So my 2 questions are:( if cost is not so important) :
1.will it work if i install a servo and be able to drive from 0-2300 rpm with enough torque even in very low rpm? and will i be able to do rigid tapping?
and 2. what servo (i.e. how many KW-rpm) should i buy to use in the spindle for that?
Please help...
I am refurbishing my Wabeco ccd6000 lathe with servos in X and Y axis.
I am just starting to use "servos" for the first time and i am installing 2 Delta ecma servo motors AC to the x and y axis on my old wabeco lathe.The controller is csmio - a with the enc and mpg modules.
For the spindle i would like to improve and change the original motor with either a ac motor driven with a vfd OR a AC servo and driver.The spindle is belt driven so i would like to either use a toothed belt instead of the original one which is not toothed.I have seen servo driven spindles but some people are saying that -apart from spending a lot of money for a servo and driver-by belt there is too much resonance and is NOT going to work(i.e. the connection motor to spindle should be rigid).I would like to be able to have the servo precision and even be able to do rigid tapping (which i thing is only possible with a servo driven spindle).
The original motor is a dc 1400W motor 5000rpm getting reduced by the pulleys to 2300rpm and rpms are adjusted by a potentiometer from 250 to 2300rpm.Or if i want to go lower than that i have to change the pulleys ratio and go from 50 to 500rpm.
So my 2 questions are:( if cost is not so important) :
1.will it work if i install a servo and be able to drive from 0-2300 rpm with enough torque even in very low rpm? and will i be able to do rigid tapping?
and 2. what servo (i.e. how many KW-rpm) should i buy to use in the spindle for that?
Please help...