The Home Machinist!

My 4 year old Enco 12x36 motor died today, or possibly something else leading to the motor gave out. Fuses are ok. This is wired for 220VAC single phase.

Depressing the button on KM1 causes loud vibrating noise. No motion on the motor. Not even a budge. Here are a photo of the power box with relays, etc., as well as a scan of the appropriate schematic. Anyone have anything similar to this happen to their Enco? UGH !!

Thanks,

Dan

Hi There,

Do you have a multi-meter? If so, check your
transformer inputs and outputs. If it is okay,
check KM2 and KM3.

Good Luck!
-Blue Chips-
Webb

Not a bad diagram. Manually depressing K1 and the Buzz indicates one side of the 220 is there and not the other. Cutting thru this I see the F/R switch is in the middle and often the contol is on the apron but the switch is at the QC>if one loose connection there, the other field doesn't activate.

Danlins, if you've got Webb looking over your shoulder you don't need any "help" from me, I'm just blown away that an Enco machine has Siemens electro-mechanicals.
Pay attention to Webb, he'll get you through.

Sounds more like the a capacitor issue! If one side of the 220 is missing it should do nothing as this is single phase, not 3 phase.

If it is "grunting" it may be trying to start but if you have a capacitor issue, it will not start under the load of spooling up the chuck.

Or the motor is shot!

Dave C.

_________________
I learn something new every day! Problems is I forget two.

Thanks for the replies. I'll do some checking on these points.

Dan L

Here's a dumb question: can you spin the motor by hand? If not, then the motor may be seized.

Is it a valid test to test the starting caps by winding a cord around the chuck, turning it on and pulling the cord like a pull starter? Not telling you to do that, just wondering if that's a good test.

My brother the mechanic says to always check the easy things first, even if they are not the likely cause.

Steve

looks like km1 is the power safety contactor and km2 and km3 are forward and reverse contactors. its interesting the capicator is tied to ground in the print and the transformer core. my not be what we first see it as being. the capicator may live on the motor and not be shown on the print at all

Snow is hampering my ability to go test these things out. I do recall spinning the motor freely.

Turned out it was one leg of the 220 went dead. Thanks for all the help, folks....

good now your back to making metal scraps. hihi