Surface grinder electrical help

kmf600 said:
Sometimes you can smell the smoke stronger in one section. The only thing I can think to try over the internet is, run the motor again, the way you had it before, without the switch, and see what happens.
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Here's what happened:
and

I had some leaking oil near the motor, I discovered, but I don't think that was the source of the smoke. Looks like it's definitely from inside the motor. Maybe that 3rd jumper wire is in the wrong spot?

[edit] sorry for the camera work, hard to hold a cell phone and a flashlight in each hand and still not burn the garage down haha
 
Have you pulled the cover off the capacitor yet? Pull that off and take a look. It might be the starting windings are not kicking out after startup. Sticky switch, etc can cause this.
 
Ken H> said:
Have you pulled the cover off the capacitor yet? Pull that off and take a look. It might be the starting windings are not kicking out after startup. Sticky switch, etc can cause this.
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Looks fine to me, but I don't know what I'm looking for.
kfSRFt9.jpg
 
That capacitor looks good, but it's hard to tell by visual looking. I see the smoke coming out, but not sure what it can be. Perhaps just some oil or something inside that needs to dry out? Can you hear the starter windings kick in or out as motor starts or stops?
 
I don't know what those would sound like. The smoke only starts after about a full minute or two of running. I'll post a video of it starting and running before the smoke starts so you can hear what it sounds like.
 
I see the smoke also. Electrical burning has a very distinct smell, not really anything like burning oil.

I paused the video, did you spin the solid jumpers around and put them under the screws you landed the cord, or remove them? Those jumpers need to be, one from where your black(hot) wire lands, to the empty screw, where the jumper was before, and there needs to be another one from where your white(neutral) lands to where the other empty screw, where the old jumper was. I'm not sure if I'm missing them in the video.
 
kmf600 said:
I see the smoke also. Electrical burning has a very distinct smell, not really anything like burning oil.

I paused the video, did you spin the solid jumpers around and put them under the screws you landed the cord, or remove them? Those jumpers need to be, one from where your black(hot) wire lands, to the empty screw, where the jumper was before, and there needs to be another one from where your white(neutral) lands to where the other empty screw, where the old jumper was. I'm not sure if I'm missing them in the video.
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Oh snap, I definitely screwed that up! I'll go see if that fixes it. Yikes, I hope I didn't fry the motor by doing that...
 
I didn't see the smoke in that last video - perhaps I just missed it. What you've got in a dual voltage motor is two coils, for high voltage they are seriesed, and low voltage they are in parallel. That's what the jumper does, either connect in series for 240 vac and parallel for 120 vac.

Just run it a while longer? BUT - that's not just a plain old 1 ph motor, that's a special surface grinder motor so you do want to be careful not to burn it up.

Ken H>
 
Ken H> said:
I didn't see the smoke in that last video - perhaps I just missed it. What you've got in a dual voltage motor is two coils, for high voltage they are seriesed, and low voltage they are in parallel. That's what the jumper does, either connect in series for 240 vac and parallel for 120 vac.

Just run it a while longer? BUT - that's not just a plain old 1 ph motor, that's a special surface grinder motor so you do want to be careful not to burn it up.

Ken H>
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It's aliiiiive!!

I put those links back in where they were supposed to be and I ran it for about an hour last night with no issues. Here's a video throwing some sparks for the first time. I got the wheel dressed and the chuck dialed in place and mostly ground down. Need to take about another thousandth off the top and it will be prepped and ready to flatten knives.


Now that it's running, if anyone has any user tips for a first time user I'd be happy to hear them too. :-)

Thanks again K Ken H> K Kevin Kf knives and Drew Riley Drew Riley for all the help, I appreciate it immensely. If any of you are ever in the Lansing MI area hit me up and I'll buy you a beer!
 
Good deal - looks like it's working nicely. I worked in the tool 'n die maintenance dept of a manuf'ing company about 50 yrs ago and used surface grinders then. Just been too many years to remember any real details about best work practices - other than those wheels need taking care of, and proper dressing.
 
Ken H> said:
Good deal - looks like it's working nicely. I worked in the tool 'n die maintenance dept of a manuf'ing company about 50 yrs ago and used surface grinders then. Just been too many years to remember any real details about best work practices - other than those wheels need taking care of, and proper dressing.
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Sometimes it's not easy to troubleshoot over the internet, but the pictures and videos were a good tool.
 
Glad you got it going. I’m about 3 hours from Lansing. My last job had me going up to Grand Rapids and/or Kalamazoo on occasion, but I don’t work for them anymore. If I did, I’d probably take a small detour!
 
Drew Riley said:
Glad you got it going. I’m about 3 hours from Lansing. My last job had me going up to Grand Rapids and/or Kalamazoo on occasion, but I don’t work for them anymore. If I did, I’d probably take a small detour!
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I was born and raised in Grand Rapids and only just moved from there to Lansing about a month ago actually. The offer will stand if you do ever make it out towards Lansing some day!
 
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