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Mpu11 lathe threading speed
Posted: Mon Jul 26, 2021 5:46 pm
by bakeng
What is the fastest an mpu11 can thread on a lathe (spindle rpm) ?
Re: Mpu11 lathe threading speed
Posted: Mon Jul 26, 2021 6:33 pm
by tblough
I think you'll be limited to your servo's acceleration over the MPU11's signal bandwidth, and therefore "fastest" depends on your individual servos and the pitch of the thread you're cutting.
Re: Mpu11 lathe threading speed
Posted: Mon Jul 26, 2021 6:37 pm
by bakeng
What will happen when the limit is reached?
I have a big order and I’m trying to determine how fast we can cut a successful thread.
It’s 9/16-18 in 12l14 material
Re: Mpu11 lathe threading speed
Posted: Mon Jul 26, 2021 7:51 pm
by tblough
You should get overcurrent or position errors once you start exceeding your accell rates. These will probably occur right at the start when Z is getting up to speed, or more probably at the end of the thread when X is trying to retract out of the cut.
Try it and see. Worst case is you'll scrap a part - should'nt damage the machine. I regularly thread at 1000 rpm on my Hardinge conversion.