sweep motor tripping

[jandlcox]

I have a machine that the sweep motor trips about 2 to 3 times a day. Replaced with a known working motor still does it. Any ideas??

[Kat]

Re: sweep motor tripping

If it's just the stator that's been replaced, more than likely it's in the centrifugal mechanism. The frisbee/springy thing on the rotor shaft of the gearbox. (assuming Westinghouse/A.O. Smith here).

Please post type of motors in use there.

[jandlcox]

Re: sweep motor tripping

I have replace the whole motor and gearbox with a working one.

[John_Galt]

Re: sweep motor tripping

Hows 'bout bad bearing on the sweep driveshaft, bad rod end, bad pillow block or torque tube end, worn bushings &/or pin in the sweep arms, or sweep dragging on the flat gutter?

C

[John_Galt]

Re: sweep motor tripping

...or maybe cruddy S points, a weak capacitor, or a poor connection in the plug? Tried running it off the table plug? Is there a big arc in the motor &/or the contact when it starts? Tried a different chassis on this machine?
These are areas I'd look at.

[Tablejam]

Re: sweep motor tripping

i would also check for burned/bad pins, connectors in the c-1 plug on the chassis side and the machine side- this can also cause an intermittent problem like that

[Tablejam]

Re: sweep motor tripping

i would also check for burned/bad pins, connectors in the c-1 plug on the chassis side and the machine side- this can also cause an intermittent problem like that

[Tablejam]

Re: sweep motor tripping

ok i don't know how that got up there twice

[Rep]

Re: sweep motor tripping

Capacitors (as already mentioned) would be my first thought. Check them out

[jandlcox]

Re: sweep motor tripping

How is the best way to check the capacitors?

[felix]

Re: sweep motor tripping

To test a capacitor, remove the connection from one terminal and take a resistance reading with a volt-ohm meter. Connect the meter and wait approximately one minute for the capacitor to charge up. A reading of 50,000 ohms or more indicates a good capacitor. A reading of zero ohms indicates a shorted capacitor. No reading indicates an open capacitor.
A shorted capacitor in a sweep or table motor will prevent the electrical brake from operating causing the motor to coast.
An open capacitor in a sweep or table will prevent the motor from starting. [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img] [img]/content/btubb/images/%%GRAEMLIN_URL%%/wink.gif[/img]

[ledgeviewmech]

Re: sweep motor tripping

ARE YOU USING AN EXTERNAL MOTOR START SWITCH OR ARE YOU USING THE INTERNAL SWITCH WITH THE CENT. MECH. ? DOES THE MOTOR OVER HEAT WHEN IT TRIPS

[AmfPro]

Re: sweep motor tripping

Well since ya changed the motor, its not a motor problem. Most like likely the upper or lower sweep contacts or a capacitor going bad-CSM 1 or 2 or both. Could also be a mechanical bind somewhere also. We have a tool that I made up out of an old Proshop handheld finger and thumbhole sander, that I made a motor crank fitting to put on it to check for mechanical binds without having to hand crank through from 0 to 0 degrees. Can only be used with machine unplugged though. We blew alot of capacitors out last year and started converting to the new siemens enclosed T and S relays. They sure seem to be good relays. No failures yet in 8 months now and no blown caps yet either.