Miter Saw Issue - Woodworking Talk - Woodworkers Forum
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post #1 of 11 Old 11-21-2018, 02:38 PM Thread Starter
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Miter Saw Issue

I have a 12" Hitachi Laser Miter Saw that will not cut accurate 45s. I took it in for warranty repair and was told the fence was off and now repaired. It made no difference. The joints are always off about a degree and will not mesh. I used to have a 10" Delta and never had this problem.

Yes the blade is square to the fence as well with a 45 angle against the blade/fence. Have also changed the saw.

Any ideas?
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post #2 of 11 Old 11-21-2018, 02:44 PM
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You want the blade square to the table and the blade 45 deg in reference to the fence. If these two conditions are met then I would look closely to see if there is any wobble in the blade movement. Also make sure the cutter head is locked solid in the 45 deg position and cannot move any amount.


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post #3 of 11 Old 11-21-2018, 03:16 PM
where's my table saw?
 
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A few questions ...

Isthe fence a 2 or 1 piece fence?
Can you run a straight edge all the way across with no gaps?
Does the 45 degree angle fit against the blade and fence in both left and right positions?
Do you cut miters using both 45 degree positions?


You can make a jig to cut 45's using only a 90 degree/0 degree position on the saw. RAS users do this to avoid changing from the 90 degree setting and losing it. It's just a simple plywood piece with an accurate 45 degree cut on it.
https://www.instructables.com/id/Eas...adial-Arm-Saw/

here's one for a miter saw:

I don't agree with using the small tri-square to set the 45 on the jig, it's too short for an accurate alignment.

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 11-21-2018 at 03:21 PM.
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post #4 of 11 Old 11-21-2018, 03:27 PM
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Have you tried clamping the material when you make the cuts?

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post #5 of 11 Old 11-22-2018, 07:41 AM
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With the blade all the way down, see if you can move the handle side to side to see if there is any play in the saw. Not saying the Hitachi is a cheap saw at all, but some of the lesser well built saws will have side to side play which will make some cuts off a little.

http://www.diychatroom.com/
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post #6 of 11 Old 11-22-2018, 10:34 AM Thread Starter
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Locked solid, no wobble.
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post #7 of 11 Old 11-22-2018, 12:16 PM
where's my table saw?
 
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I'm confused ...

You come here looking for help. You are asked several questions regarding the setup of the saw, then you have a two word answer to a single question. Can't expect much help with that info....

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #8 of 11 Old 11-23-2018, 04:40 PM Thread Starter
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Sorry, Fence is two piece. No gaps with straight edge, and cutting both directions make the miter worse. Placing an angle against the fence and blade looks like it's perfect....but it's not. I just discovered the laser is off 1/2 of a degree. I did this by drawing a 45 degree angle on a 8x8 chunk of plywood. To match the laser line across this drawn line it's 45 1/2 degrees. If I use this setting miters are perfect.

Thanks to all for your help.
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post #9 of 11 Old 11-23-2018, 04:43 PM Thread Starter
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no but I did notice select pine will slide if you don't strong arm it.
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post #10 of 11 Old 11-23-2018, 04:44 PM Thread Starter
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It's solid.
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post #11 of 11 Old 11-23-2018, 05:39 PM
where's my table saw?
 
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I wouldn't trust a laser ....

Quote:
Originally Posted by 1011hans View Post
Sorry, Fence is two piece. No gaps with straight edge, and cutting both directions make the miter worse. Placing an angle against the fence and blade looks like it's perfect....but it's not. I just discovered the laser is off 1/2 of a degree. I did this by drawing a 45 degree angle on a 8x8 chunk of plywood. To match the laser line across this drawn line it's 45 1/2 degrees. If I use this setting miters are perfect.

Thanks to all for your help.
If the miters are perfect using 45.5 degrees, adjust the fence. Don't use a laser for anything that must be "dead on" accurate. They are fine for construction work, but not for fine woodworking were more precision is required. Some lasers are very precise like when getting eye surgery, but not those that come with a $150.00 miter saw.


The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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