View Single Post
  #9   Report Post  
Posted to rec.crafts.metalworking
Paul Drahn[_2_] Paul Drahn[_2_] is offline
external usenet poster
Posts: 31
Default Single Phase Pulse

On 2/6/2021 5:57 PM, Bob La Londe wrote:
On 2/6/2021 3:37 PM, Jim Wilkins wrote:
"Paul Drahn"* wrote in message ...
On 2/2/2021 10:20 AM, Bob La Londe wrote:
My bigger import lathe is not bad.* I can dial stuff in by hand to
about 3 tenths.* The problem is under power the indicator needle turns
into a blur about 1.5-2 thousandths wide.* For 99% of what I do that
is fine, but that other 1% is growing.* Is the only answer to install
a 3 phase motor?* I'm not completely against it, but its a bit of a
job to move the lathe, swap the motor, and reconfigure the controls.
Not something I can do in an afternoon.

Are sure the problem is the motor and not the gears driving the spindle?


The motor may be the easiest potential cause to confirm or eliminate.

I'm not 100% sure of anything anymore.* I may just not have dialed it in
as close as I thought.* Just for the heck of it I turned a piece of
medium hard pin stock and slapped an indicator on it as cut and only got
a couple tenths runout with the motor turning the chuck at 300 RPM. Now
I am thinking I must have shifted the chuck at some point when I was
adjusting the set tru part.* Either that or there was a bad spot on the
first dowel I used that was making the indicator jump when running.

Either way I'll have to loosen it up and reset it when I need to do a
job that has to be flipped in the middle.

Anyway, a motor swap is probably not needed at this point.

Good to know. Good luck.