1. Home
  2. ⏣ General Metalworking
  3. New Lathe problem

New Lathe problem

What would make my lathe to become slow to get up to speed? It was working
fine and then just started to start slowly. Its starting at the same speen
in forward or reverve. The motor is a double capacitor 240V. Any ideas?
Thanks
Reply to
stu
Loading thread data ...
If the lathe is belt drive, slip off the belts and turn the lathe by hand. If its stiff you may just have a tight bearing somewhere. If its free, run up the motor with the belts off, if its still slow it could be a capacitor going down, or the centrifugal contacts being stuck open all the time keeping the start capacitor out of circuit. No smell of magic smoke or hot amps? Does the motor turn over easily by hand? as you see it could be a number of things Im sure youll find it. Ted Dorset UK.
Reply to
Ted Frater
It turns by hand just fine
I'll try this in the morning. I wasn't sure the there would centrifugal contacts in there.
No magic smoke as yet. Nothing getting hot that I can find.
Yes
Thanks
Reply to
stu
Where if any centrifugal switch might be will depend on the motor age, design, maker etc.
Generally tho there a set of spring return weights on the armature shaft. Ive had them work fine on motors 40 yrsold , and be seized up on a 5 yr old one. Generally under the end cover non output shaft.sometimes you can seethem on motors that have removeable inspection plates, on motors from the 1930's to 60's. Later motors tend to be more enclosed and difficult to work on. keep us posted what you eventually find it is.. Good luck. ted.
Reply to
Ted Frater
Usually you can hear an audible click on spin-down when the centrifugal switch resets. A bit late now for that maybe, but you might possibly remember hearing/noticing that after my mentioning it. It could still be clicking too, but not really making any sort of electrical connection.
Reply to
Leon Fisk
One of the capacitors has died. Double suggest cap-start cap-run, and it is the start cap which is most likely to have died.
Good Luck, DoN.
Reply to
DoN. Nichols
Thanks for the replies. The good news is the lathe is fixed. The supplier came up with a new motor. Seems to have been a batch. The better news is I get to keep the old one, so I'll still be trying to fix it.
I've have it open and the switch looks fine. So its most likely a bad cap or bad soldering. If I get it going it will go on the huge old pillar drill I have.
Reply to
stu

Site Timeline

Related

  • What motor to get for my Craftsman lathe 12x36

  • The motor on my newly acquired lathe doesn't look good to me. wires hanging...

  • Fitting VFD to BH600 lathe

  • Hello all,I decided to break the bank and bought a NewtonTesla VFD system forthe...

  • Jet Lathe: rewire 110v to 220v ?

  • Hi,I just bought a *barely used* Jet metal lathe from my localuniversity. Its a...

  • Attach Rotary Table Vertically to Mini-Lathe?

  • I would like to purchase my first mini-lathe but have one big remainingquestion....

  • Which heater to keep my lathe warm?

  • My lathe lives in an un heated garage and shares with two cars.Both cars come in...

  • Trying to ID an antique lathe

  • I was send this photo with no description today (probably in response to awanted...

  • What lathe to buy?

  • I need to build an automatic machine to perform a fairly simple job. I'd...

  • New to me lathe!

  • I just picked up an older Sidney Lathe the swing is 12" and between...

  • Threading on a "slow to stop" lathe

  • I am still trying to identify my lathe pictured at...

  • New to group: Boxford lathe

  • Hi all,I have just picked up my new lathe. It is a Boxford lathe but I have...

  • What would you use to lubricate drawer slides

  • I Would like to lubricate drawer slides (friction, not ball bearing),and wanted...

  • Moving Rockwell 11x24 lathe to basement

  • I am about to move my rockwell 11x24 lathe into the basement.The plan is to...

  • New Lathe

  • On the basis that it is now in stock (been watching for a while) is this a...

  • What lathe to look for?

  • My buddy is looking for a general purpose lathe that will get used a few times...

  • wear in cross-slide nut contribute to lathe chatter?

  • I have a venerable 1949 South Bend 9" lathe. Sadly, its cross-slide nut (or...

  • Boxford STS lathe conversion to single phase

  • I have just bought a 3 phase Boxford STS and would like to convert it to...

  • Which indexable lathe tools to get?

  • Any recommendations for indexable lathe tools to use on my Super C3 mini lathe?...

  • Taig Lathe Cross Slide Problem

  • [Most people seem to be pretty happy with their Taig equipment. It soundslike...

  • How to Run a Lathe download

  • I don't think South Bend ever intended to make any money off of "How to Run...

  • Anyone got a Crozier Speed lathe manual?

  • Ive been working on the various bits and pieces Ive got stuck here andthere..and...

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.