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-   -   Dewalt 34-670 table saw blade alignment (https://www.woodworkingtalk.com/f12/dewalt-34-670-table-saw-blade-alignment-101401/)

OldGuy1 07-26-2015 01:11 PM

Dewalt 34-670 table saw blade alignment
I have an aging but still good 34-670 table saw. The blade (and motor spindle are not aligned with the miter gage slot. (Never has been, really) I have suffered through this for years and decided to finally address the problem.

Does anyone know how to adjust the alignment of the motor spindle so that the blade is parallel top the slot? The manual says that it is aligned at the factory, but I can see no obvious method of adjusting this.

FrankC 07-26-2015 01:55 PM

There is lots of information about this online, a good start is this Rockler article that defines the terminology:

A search for "table saw trunnion adjustment" will bring up several you tube videos and many sites explaining how to accomplish what you need.

woodnthings 07-26-2015 02:09 PM

a simple answer is ...
If you can turn the saw on it's back side you will see the trunnions are held to the table by 6 bolts, 3 at each end....usually.

The process is to deterimine by measuring to the slot from the tip of a tooth on the blade which direction the carriage assembly must move at the front... towards the slot or away from the slot.

To start this process you slightly loosen all but the bolt on which you want the carriage to pivot based on the aforementioned measurement. Pry it over, slightly and remeasure. Keep at this until the measurements are the same for the front of the blade and at the rear. The blade is a "plane" and what you are trying to do is make the plane of the blade parallel to the miter slot.

When you think you've got it snug the bolts and remeaasue again. If it's good, you have completed table saw alignnment 101....:yes:

OldGuy1 08-01-2015 08:49 AM

Thanks to all that responded. I watched several videos, read an article and after several attempts, managed t get it aligned to 1mm. I'm happy with that. Heck, my eyes aren't that good anymore.


woodchux 08-01-2015 09:05 AM

If you are satisfied with your adjustment results, it is IMO one of those things you could/should have done years ago to save yourself the "suffering". Now you know how in case it happens again. Be safe.

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