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General Mach Discussion / Re: thread problem
« on: January 17, 2009, 04:48:06 AM »
Not sure how Mach through the parallel port reacts to a slowing spindle, I was under the impression that it would slow the axis to compensate but as I use the SmoothStepper I cant test. Actually I couldnt really test anyway as the spindle on my lathe would t' get affected by even taking a full DOC in a threading op.
I can confirm however that the SS does react to spindle speed, this was proved to me when a key inside the headstock had sheared and I didnt know, I started a thread and heard the spindle slowing and was about to hit the e-stop but noticed that I heard a change in axis motor speed so let it continue. It did all 10 passes and I did a feedhold and inspected the thread and it was perfect. During the threading the spindle was at 1000rpm at the start of each pass but by the end of each pass it was down to 200 or so rpm and to say the least I was very impressed with the way the SS handled things.
Hood
I can confirm however that the SS does react to spindle speed, this was proved to me when a key inside the headstock had sheared and I didnt know, I started a thread and heard the spindle slowing and was about to hit the e-stop but noticed that I heard a change in axis motor speed so let it continue. It did all 10 passes and I did a feedhold and inspected the thread and it was perfect. During the threading the spindle was at 1000rpm at the start of each pass but by the end of each pass it was down to 200 or so rpm and to say the least I was very impressed with the way the SS handled things.
Hood