I've had this saw for 5-6 years. Running on 240v and never an issue. Until yesterday.
I've been using the saw quite a bit lately. Built a bathroom vanity, trimmed a bunch of baseboard and door and window casings and yesterday, I turned it on, it powered up and before I fed the material the motor stopped. Got out the owners manual and found the reset button. So I reset it and now the motor runs backwards. Yup, backwards.
It did not die, it is still running. Just backwards.
Did you try pressing the reset button a second time? Have you unplugged the motor and then plugged in again? (this often cures problems with digital devices, but I do not know why it would help with an analog device. However it cannot hurt to try.)
Does your motor have a wiring diagram on it? Or does the manual?
It did not die, it is still running. Just backwards.
Did you try pressing the reset button a second time? Have you unplugged the motor and then plugged in again? (this often cures problems with digital devices, but I do not know why it would help with an analog device. However it cannot hurt to try.)
Does your motor have a wiring diagram on it? Or does the manual?
I did press the reset button a second and then a third and fourth time. No luck.
I did unplug the unit as I revised the connections from 240v to the switch.
I haven't been able to find a wiring diagram online, however, why would all of the sudden start doing this if I had not messed with anything before it happened?
It's a belt drive, so temove the belt and turn it on. Note the direction it wants to turn, CW or CCW. Turn it off and spin it in the opposite direction so it's spinning that way when you restart it, you'll need to be quick about it. See if it will restart in that direction each time. If so, then it may be "fixed" .... I donno?
If it continues to run in the "wrong" direction, reverse the wires inside the cover that determine rotation.
It's a belt drive, so temove the belt and turn it on. Note the direction it wants to turn, CW or CCW. Turn it off and spin it in the opposite direction so it's spinning that way when you restart it, you'll need to be quick about it. See if it will restart in that direction each time. If so, then it may be "fixed" .... I donno?
If it continues to run in the "wrong" direction, reverse the wires inside the cover that determine rotation.
I might try that. I first read in different forums that it might be the start capacitor or the run capacitor (Apparently it has both). A licensed electrician friend of mine suggested spinning the blade in the correct direction by hand (Push stick in my case) and as its spinning, start the motor. And it started, backwards, again. So yes, I might change connections 5-8, but why? What happened from earlier that morning that it was running just fine to running backwards after an overheated motor reset?
If the start capacitor circuit fails, the motor will hum for a few seconds and then likely trip the circuit breaker supplying the saw.
If the power switch fails the saw won't start.
If the circuit breaker feeding the saw is tripped, the motor won't start.
You need to test the circuit to see if it has power at the plug, then at the switch, then after the switch at the motor. Only then will you have a clue as to what is wrong with your saw.
It won't be the switch, or the circuit breaker, and since it runs, it has power. It is certainly a mystery why it runs backwards. If it is consistent and always runs backwards, then as I suggested, reverse the wiring to change the rotation. If that works, that all that's needed.
:wink:
It won't be the switch, or the circuit breaker, and since it runs, it has power. It is certainly a mystery why it runs backwards. If it is consistent and always runs backwards, then as I suggested, reverse the wiring to change the rotation. If that works, that all that's needed.
:wink:
Most induction motors over 1 HP are reversible, so that why I recommend trying the reverse wiring approach.
In the short term, if you need to complete a project, just twist the belt. It's a farmer's trick on tractor driven flat belt combines to get them to run proper. Yes, the belt will rub on itself, but in an "emergency", belts are cheap.
Is it a cap start or does it have a centrifugal switch. Sounds to me like the CS has failed open. You will normally here it close when you turn the motor off, just before it stops rotating.
Have you lost power on one side of the line? When I was in manufacturing, we used to call that "single phasing". I wouldn't rewire without a good reason. Do you have a voltmeter?
Have the capacitor checked. HVAC or electricical shop should be able to check it for you. Did you also check that you have 240volts at the motor and not just 120v?
Steve: Honey, I'm going to call Delta PowerTools and see what happens. - She gives me an eye roll.
Steve dials and after 4 tries and 20 minutes gets a live person.
Delta Customer Service: What seems to be the problem?
Steve explains everything I've explained here and finishes with: Have you ever heard such a thing? A Saw spinning backwards?
DCS: Yes, I have.
Steve:
DCS: Pretty sure it's the capacitor.
DCS proceeds to give Steve the model number of the run and start capacitors and a phone number to purchase them.
Steve thanks him profusely and proceeds to his tool box where he has a 45uF 370/440VAC capacitor from his previous house's HVAC. He will replace the run cap. The table saw calls for a 40uF 370VAC.
Steve installs said capacitor and the saw still spins backwards. One more time.
Frustrated, Steve will order the start and run caps via Amazon, that are approximately $15/each instead of the $75 and $50 quoted for the Delta OEM Caps.
PS: He's is not able to find his multi-meter to test the capacitors. He knows its somewhere in the basement, but cannot locate it at the moment.
You seem to be going in the right direction, I am not an electrician but I do know from experience that electric motors will spin when plugged in, however they may be running only on the starting windings and have no torque, bought a few like this at swap meets.
Something has happened to cause your motor to run in reverse, probably best to figure out what before you let out the smoke. 😊
You seem to be going in the right direction, I am not an electrician but I do know from experience that electric motors will spin when plugged in, however they may be running only on the starting windings and have no torque, bought a few like this at swap meets.
Something has happened to cause your motor to run in reverse, probably best to figure out what before you let out the smoke. [emoji4]
does it spin in reverse at full power and speed from what you can tell? my guess is that you did lose one leg of the power. it could be the switch, capacitor, or?? you will need to check the power at the motor (for 240vac) if you have that skill set, if not get help. i would not rewire in this situation.
DING DING DING DING !! Tell us what he won Vanna!! (Cue Wheel of Fortune Music)
I received and replaced both capacitors today. My wife was witnessing so she’d see she married not only a good looking, great all around guy, but a superhero who can build and fix everything!! The saw started (backwards), made a POP and CRACKLE and started smoking. Big time.
Called Delta Customer Service, again. The guy remembered me from a week ago and was puzzled by the POP and CRACKLE. Spinning backwards, after replacing the capacitors, he thinks it might be the centrifugal switch.
Time to remove the motor and take it somewhere or replace it. Or replace the table saw for a 1 3/4 or 3 HP cabinet saw.
Unless that motor is a "C" frame mount you can use a different brand of motor. If the frame is a type 56, there are virtually a few dozen brands that will work fine. We need to know from the info on the motor name plate to determine which frame type it is .... Post a photo?
Another case of the sum of the parts being greater than the whole! At least with the older contractor saws you could throw just about any motor on it and get back to work.
Thank you to all that participated trying to trouble shoot my motor woes.
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