motor on my mill

D

dalem954

Plastic

Joined

Dec 10, 2012

Location

Lakeport , Michigan U.S.A.

• Dec 3, 2016

• #1

The motor on my mill is making odd noises .It is a 3 ph motor running with a ph converter . If it were a gas engine it sounds like it is missing . Any help would be greatly appreciated . Thanks
Dale

 

T

timvercoe

Hot Rolled

Joined

Sep 27, 2013

Location

Arizona USA

• Dec 3, 2016

• #2

what kind of phase converter, capacitor/static or rotatory? My china man lathe sounds like it starts and stops run on a capacitor/static. When it was run on a rotatory it ran smooth.

Tim

 

M

Mike C.

Diamond

Joined

Nov 25, 2004

Location

Birmingham, AL

• Dec 3, 2016

• #3

Could also be bad contacts and/or the generated leg of a rotary converter tied to the controls.

 

D

dalem954

Plastic

Joined

Dec 10, 2012

Location

Lakeport , Michigan U.S.A.

• Dec 3, 2016

• #4

It is a capacitor Box .It started out by making a funny noise when I Would turn the power off. Then last night it started to make the same noise while it is running . It also seems to be running slow . Thanks

 

A

atomarc

Diamond

Joined

Mar 16, 2009

Location

Eureka, CA

• Dec 3, 2016

• #5

Single phasing?

Stuart

 

H

hitandmiss

Titanium

Joined

Jul 31, 2010

Location

Rochester, NY USA

• Dec 3, 2016

• #6

dalem954 said:

It is a capacitor Box .It started out by making a funny noise when I Would turn the power off. Then last night it started to make the same noise while it is running . It also seems to be running slow . Thanks

Click to expand...

The obvious thing to do is get the power off and open the capacitor box.
Be VERY careful, I have seen some that do not discharge the capacitors.
Measure the DC voltage across the 2 leads for each capacitor. It may be over 200 Volts. It needs to be less than 10-20 Volts to be safe to work inside the box.
Inspect the vent on the black plastic case capacitor(s) for leaking. If the start circuit is not working properly to disconnect the start capacitor, (the black plastic job) they will overheat and leak. If this capacitor is not disconnected after starting, but left in circuit, you have symptoms as you describe.

Bill

 

JST

Diamond

Joined

Jun 16, 2001

Location

St Louis

• Dec 3, 2016

• #7

atomarc said:

Single phasing?

Stuart

Click to expand...

ALL the static converters do "single phase" the motor. Some have a helper "run" capacitor, some do not.

 

D

dalem954

Plastic

Joined

Dec 10, 2012

Location

Lakeport , Michigan U.S.A.

• Dec 4, 2016

• #8

Hi I took the box off the wall and looked inside and yes their is a capacitor that is leaking . Thanks for the help everyone . Dale

 

JST

Diamond

Joined

Jun 16, 2001

Location

St Louis

• Dec 4, 2016

• #9

The other possible issue is that the capacitor is supposed to be disconnected by a relay when the motor has come up to speed. That is for the black plastic cased type (starting capacitor).

It is possible that is not happening, which will damage the capacitor, and make the motor run badly.