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General Mach Discussion / Re: Whose Fault Is ThIs?
« on: November 30, 2009, 05:30:57 PM »
Hi,
I have seen the same problem when machining parts with retainer "tabs"
The X & Y accellerations are very different to the Z, as the Z is a driven knee.
If I am feeding x and y at say 300mm per min, the knee tries to do the same if the tabs ramp at 45degs. (Max Z is 250mm/min)
So I have to limit the angle of the tabs so that the Z axis does not "overspeed".
I don't see this as a Mach fault as when the Z moves Mach would need to limit the X & Y feeds to match the maximum acc / vel of the knee.
So I either speed up the knee or fit a Z on the quill....or buy a VMC
ATB
Deker
I have seen the same problem when machining parts with retainer "tabs"
The X & Y accellerations are very different to the Z, as the Z is a driven knee.
If I am feeding x and y at say 300mm per min, the knee tries to do the same if the tabs ramp at 45degs. (Max Z is 250mm/min)
So I have to limit the angle of the tabs so that the Z axis does not "overspeed".
I don't see this as a Mach fault as when the Z moves Mach would need to limit the X & Y feeds to match the maximum acc / vel of the knee.
So I either speed up the knee or fit a Z on the quill....or buy a VMC
ATB
Deker