Craftsman Table Saw Problem

Reply

  #1  
Old 03-17-05, 09:11 AM
Member
Thread Starter
Join Date: Mar 2005
Location: SC
Posts: 39
Craftsman Table Saw Problem

I have a 10" Craftsman table saw that I just got from my father in law who passed away. The problem is the saw wont work, when you turn on the switch it makes a humming sound but will not turn the blade, I dont think the motor is burned out but have no idea what it could be or what to check, anyone have any ideas. all help appreciated.
 
Sponsored Links
  #2  
Old 03-17-05, 09:27 AM
mango man's Avatar
Member
Join Date: May 2004
Location: Sw FL
Posts: 2,122
with the power cord unplugged can you turn the blade by hand ?

sounds like either the motor or something jammed
 
  #3  
Old 03-17-05, 09:31 AM
majakdragon's Avatar
Member
Join Date: Jul 2003
Location: N.E. Arkansas
Posts: 7,827
BriarBuster, Welcome to the DIY Forums.
Try what Mango suggested. That way you'll know if it is tied up. If it hasn't been used for a while the shaft may not want to move. By turning it by hand, it may just break it loose. Check the blade also. The bearings for the blade may need a little coaxing after sitting for a while. Good Luck.
 
  #4  
Old 03-17-05, 11:55 AM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 9,693
BriarBuster,

Good suggestion to spin it to see if the bearings are tight.
You don't say if this is a direct drive saw, where the blade is directly fastened to the motor shaft or a belt drive with a motor, a belt and an arbor that the blade is mounted to.

If a direct drive you can check for sideways play in the motor shaft.
Another thing I have seen on a Craftsman direct drive saw is a motor capacitor that is mounted near the switch.
You can check the connections on this but make sure the saw is unplugged and before you touch the connectors on the capacitor, short the two terminals together to bleed any charge that may be present.

Post the model of the saw and maybe we can come up with a parts list.
 
  #5  
Old 03-17-05, 11:57 AM
txdiyguy's Avatar
Member
Join Date: Mar 2003
Location: Dallas, Texas
Posts: 249
Maybe it forgot the words?
 
  #6  
Old 03-17-05, 02:14 PM
Member
Thread Starter
Join Date: Mar 2005
Location: SC
Posts: 39
the blade turns freely both ways, it is real free and spins freely with a push, the bearings are good no side to side movement at all it is tight without any sideways play, I spin it and the turn the switch on and it just eventually stops, if you spin it backwards and turn it on it stops spining faster than forwards.
I thought there was not enough power to the switch at first and plugged into a generator and after about 10 seconds of humming it throws the breaker on the generator, no strange smells like burning wires etc can be detected.
 
  #7  
Old 03-17-05, 02:38 PM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 9,693
BriarBuster,

If the blade did not continue to turn then the capacitor is not likely the problem.
I believe the motor may be gone.

Get the model number and I might have a parts breakdown.
 
  #8  
Old 03-17-05, 02:56 PM
Lugnut's Avatar
Member
Join Date: Jan 2001
Location: Kansas City, Missouri.
Posts: 1,172
It doesn't sound like the brushes, because they often spark and snap.

However, I have seen modern brushes worn so thin that they dislodge, leaving only the spring in contact with the armature. The symtoms are similar to what you are seeing. Inspect the brushes to be sure.

Next to that, it sounds like the windings are burnt up. If that is the case, put a clamp on ammeter on the power cord and see the the readings are highly irratic, fast changing, without a hint of stableness, up/down, up/down etc. If so, in my experience, that is a sign of winding failure.
 
  #9  
Old 03-17-05, 03:20 PM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 9,693
Ya, you are right Lugnut, it could be brushes.
The saws I am familiar with are induction motors with a starting switch and a run capacitor.
I changed a buddies motor on his 10" direct drive Craftsman that was like this.

Saw motors that are brush type have a gear box and can't be spun, at least they won't free wheel.
These ones are basically circular saws mounted under a table.

I have an inexpensive tabletop Delta that has an induction motor but I gave away a Skill that was a brush type.
 
  #10  
Old 03-17-05, 07:28 PM
Member
Thread Starter
Join Date: Mar 2005
Location: SC
Posts: 39
the model # is 113.295750

so it is not supposed to be spun freely by hand - it is supposed to be locked?
 
  #11  
Old 03-17-05, 08:10 PM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 9,693
BriarBuster,

There are two types of motors used in direct drive saws.
A brush type that is like a circular saw motor and won't spin and an induction motor that has a capacitor and relay and will spin.

I found your saw and you have an induction motor with a relay and capacitor.
It could be either component or even the motor.
You really need to have it tested to be sure what it is.

Click image:
<img src="http://www3.sears.com/Paul/Leadimage.asp?productTypeID=0731750&brandID=0247&modelDesc=CRAFTSMAN%2010%20INCH%20MOTORIZED%20SAW&modelNumber=113295750&documentID=00001573&documentTypeID=PLDM&documentClassCode=PM&titleType=MOTOR/CONTROL%20BOX&titleID=00008&">
Image credit: sears.com
 
  #12  
Old 03-18-05, 09:06 AM
Member
Thread Starter
Join Date: Mar 2005
Location: SC
Posts: 39
is there anyway to test the components myself to eliminate one or the other or find the cause or what would you reccomend , a new motor costs $199 and I could probably replace the whole thing for around that. how do you test the relay or capacitor to see if they have gone bad

thanks much for the help.
 

Last edited by BriarBuster; 03-21-05 at 06:27 PM.
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
'