Insert BS here A place to discuss anything you want

Bandsaw Help

 
Old 06-14-2019, 01:38 PM
  #1  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default Bandsaw Help

I've tried digging around and I can't figure out a solution for this. Was hoping you guys might be able to help.

I have a WEN 3970.
Amazon Amazon

About 2/3 of the time when I start it, the motor tries to turn but the blade doesn't move. I've found that if I turn it off and manually rotate the belt by hand and then turn it back on I can get it running. I've tried adjusting the belt tensioner and got the drive belt as tight as I can by hand. Nothing seems to fix it though. Any ideas?
LukeG is online now  
Old 06-14-2019, 02:04 PM
  #2  
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit (the part with no rules or laws)
Posts: 4,980
Total Cats: 421
Default

What is slipping? Drive belt on motor / wheel or the blade on the wheel?

Is the drive belt making proper contact? V belts need to make contact on the sides NOT in the root / bottom.
Is everything dry?
Erat is offline  
Old 06-14-2019, 02:33 PM
  #3  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default

It's weird as there is nothing slipping. The motor is trying to turn and the belt or blade seems like it is being bound up somewhere. I'm going to go over all the bearings tonight and make sure they are turning freely. Is there anything I should use the clean up all the metal shavings other than a dry rag and air?
LukeG is online now  
Old 06-14-2019, 02:52 PM
  #4  
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit (the part with no rules or laws)
Posts: 4,980
Total Cats: 421
Default

Don't want it too tight either.

Should be able to spin everything around by hand. Air rag and brush should be all you need.
Erat is offline  
Old 06-14-2019, 03:51 PM
  #5  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default

Thanks! I'll look it over and report back tonight.
LukeG is online now  
Old 06-14-2019, 04:26 PM
  #6  
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit (the part with no rules or laws)
Posts: 4,980
Total Cats: 421
Default

Wait.

110v motor. I'm assuming it's got a starter capacitor on it. Now that I reread your initial post I think that could be your problem.
Also sort of verified that when you give it a push it takes off.

It should fire off nice and fast. The motor should be able to overcome the belt if it is being bound up.
Erat is offline  
Old 06-14-2019, 04:28 PM
  #7  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default

Yeah, it's a 110v. I can replace the capacitor if need be. I'll try to clean it first and see if I can find anything.
LukeG is online now  
Old 06-14-2019, 05:27 PM
  #8  
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit (the part with no rules or laws)
Posts: 4,980
Total Cats: 421
Default

If you have a DDM you can set it to ohms. If it's open or inconsistent readings it's smoked.

Make sure you disconnect obviously and short it out to discharge it first. I've been nailed before it isn't fun.

It should be labeled with the information to track down a new one if bad.
Erat is offline  
Old 06-17-2019, 10:03 AM
  #9  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default

You were spot on. Old capacitor looked very rough. Ordered a new Dayton replacement from Grainger. Will update if it fixes the issue but after researching more it sounds like it is the capacitor.


Last edited by LukeG; 06-17-2019 at 10:34 AM.
LukeG is online now  
Old 06-17-2019, 03:01 PM
  #10  
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,618
Total Cats: 286
Default

Came here to say starter capacitor. I just changed one on a pool pump motor.
TurboTim is offline  
Old 06-19-2019, 11:03 AM
  #11  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default

So that didn't go as planned... got the new Dayton capacitor installed and the bandsaw started right up and worked great for about 2 minutes. Then POP, the capacitor exploded. I looked everywhere on it for a polarity + or - and couldn't find anything. Assumed it could be installed either way, but apparently not. Next plan is to order two capacitors and if it blows up again just install the next one opposite of the first.


LukeG is online now  
Old 06-19-2019, 11:12 AM
  #12  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default

Called Wen just for the hell of it and they are sending me a new capacitor. Getting confirmation now with one of their techs about the polarity.

They did confirm it has to be oriented properly with polarity. I'll just install it the same way as in the picture and hope for the best.
LukeG is online now  
Old 06-19-2019, 12:25 PM
  #13  
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit (the part with no rules or laws)
Posts: 4,980
Total Cats: 421
Default

Yes. Sorry I failed to mention that.
With that being said we all learn from our mistakes.
Erat is offline  
Old 06-19-2019, 12:43 PM
  #14  
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,618
Total Cats: 286
Default

Oh, I didn't know that. I guess I lucked out on that 50/50.
TurboTim is offline  
Old 06-19-2019, 01:06 PM
  #15  
Senior Member
Thread Starter
 
Join Date: May 2017
Location: Austin, TX
Posts: 679
Total Cats: 77
Default

All good! I figured if polarity was an issue it would be marked on the capacitors. No marking on either anywhere. Lesson learned!
LukeG is online now  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
EO2K
Build Threads
118
06-13-2019 08:17 AM
poormxdad
MEGAsquirt
1
05-18-2019 08:27 AM
levnubhin
Engine Performance
83
04-16-2019 02:47 PM
Blkbrd69
MEGAsquirt
13
04-09-2019 10:17 PM


Thread Tools
Search this Thread
Quick Reply: Bandsaw Help


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.