Today is my annual fix-up and tool checkout day. When going over the
PM-66 TS, I checked blade to miter slot alignment which looked good
but then tilted the blade 45 and checked again. Off about .008 from
front to back of blade. Never checked this before because of not
having a dial indicator at the time. Seems to be something that could
be tweaked a little. Is this corrected by shimming the saw top front
to back? Couldn't find anything dicussing this DAGS.
Thank's for any info.
--
John, in Minnesota
Oh in addition, 8 thou isn't too bad. My last two saws were off a sight
more than that.
--
********
Bill Pounds
http://www.billpounds.com
"John, in MN" <[email protected]> wrote in message
news:[email protected]...
> Today is my annual fix-up and tool checkout day. When going over the
> PM-66 TS, I checked blade to miter slot alignment which looked good
> but then tilted the blade 45 and checked again. Off about .008 from
> front to back of blade. Never checked this before because of not
> having a dial indicator at the time. Seems to be something that could
> be tweaked a little. Is this corrected by shimming the saw top front
> to back? Couldn't find anything dicussing this DAGS.
> Thank's for any info.
> --
> John, in Minnesota
John in MN asks:
>Today is my annual fix-up and tool checkout day. When going over the
>PM-66 TS, I checked blade to miter slot alignment which looked good
>but then tilted the blade 45 and checked again. Off about .008 from
>front to back of blade. Never checked this before because of not
>having a dial indicator at the time. Seems to be something that could
>be tweaked a little. Is this corrected by shimming the saw top front
>to back? Couldn't find anything dicussing this DAGS.
Yeah, but...this small a misalignment just about comes under the old, "If it
ain't broke" maxim. It's probably not worth messing with unless you're seeing
problems with cuts.
Charlie Self
"Property is not the sacred right. When a rich man becomes poor it is a
misfortune, it is not a moral evil. When a poor man becomes destitute, it is a
moral evil, teeming with consequences and injurious to society and morality."
Lord Acton
On Thu, 22 Apr 2004 13:57:32 -0500, "John, in MN" <[email protected]> wrote:
>Today is my annual fix-up and tool checkout day. When going over the
>PM-66 TS, I checked blade to miter slot alignment which looked good
>but then tilted the blade 45 and checked again. Off about .008 from
>front to back of blade. Never checked this before because of not
>having a dial indicator at the time. Seems to be something that could
>be tweaked a little. Is this corrected by shimming the saw top front
>to back? Couldn't find anything dicussing this DAGS.
>Thank's for any info.
That could indicate that the tilt axis is not parallel to the plane of the top. But, I'd advise leaving it alone unless you are
noticing a problem with the cuts made with a tilted blade.
My reason for recommending this is when you start shimming, if you introduce a left/right tilt in the table top, then the axis of
rotation used to raise and lower the blade will not be parallel to the table top and the blade alignment with no tilt will vary with
depth of cut.
Secondly, the measurement you made can be very difficult to make and could have a large margin of error. Very small variations in
the height on the blade at which the measurement is taken can very easily account for the .008 variation you are seeing.
If it ain't broke (screwing up your cuts), don't try to fix it.
Tom Veatch
Wichita, KS USA
On Thu, 22 Apr 2004 13:57:32 -0500, "John, in MN"
<[email protected]> wrote:
>Today is my annual fix-up and tool checkout day. When going over the
>PM-66 TS, I checked blade to miter slot alignment which looked good
>but then tilted the blade 45 and checked again. Off about .008 from
>front to back of blade. Never checked this before because of not
>having a dial indicator at the time. Seems to be something that could
>be tweaked a little. Is this corrected by shimming the saw top front
>to back? Couldn't find anything dicussing this DAGS.
>Thank's for any info.
I checked again just to be sure by measuring from the other
side of the blade. No problem. Looks like a small dip in
the ole cast iron top is what I was measuring the first time.
Everything else looks good so the PM-66 alignment is done
for about another year. I'm really impressed how well these
saws hold their alignment. 20 some years old ( I'm guessing )
and it's still running great.
Sorry for the false alarm and thanks for the replies.
--
John, in Minnesota
Yes. It's a procedure that should always be done as part of a TS tune-up,
but seldom is.
--
********
Bill Pounds
http://www.billpounds.com
"John, in MN" <[email protected]> wrote in message
news:[email protected]...
> Today is my annual fix-up and tool checkout day. When going over the
> PM-66 TS, I checked blade to miter slot alignment which looked good
> but then tilted the blade 45 and checked again. Off about .008 from
> front to back of blade. Never checked this before because of not
> having a dial indicator at the time. Seems to be something that could
> be tweaked a little. Is this corrected by shimming the saw top front
> to back? Couldn't find anything dicussing this DAGS.
> Thank's for any info.
> --
> John, in Minnesota
It could I suppose, but proper technique should eliminate that.
--
********
Bill Pounds
http://www.billpounds.com
"Upscale" <[email protected]> wrote in message
news:[email protected]...
> "Pounds on Wood" <[email protected]> wrote in message
> news:[email protected]...
> > Yes. It's a procedure that should always be done as part of a TS
tune-up,
> > but seldom is.
>
> Could something like this be fixed by the use of blade stabilizers? I'm
> wondering of the little bit of stress caused by the tightening of the
arbour
> nut might create this type of slight mis-alignment?
>
>
No. If your blade is parallel in the vertical position but not parallel when
tilted, it means that the pivot is not parallel to the top. Move the pivot
or move the top, whichever is possible. Unless I could see that there was a
problem during actual use, I wouldn't worry about it. Dial indicators often
cause one to worry about insignificant things.
"Upscale" <[email protected]> wrote in message news:zrVhc.70>
> Could something like this be fixed by the use of blade stabilizers? I'm
> wondering of the little bit of stress caused by the tightening of the
arbour
> nut might create this type of slight mis-alignment?
>
>
One of the magazines did an article on this a few years back .. .. the
axis of tilt is not parallel to the table top. Slight shimming of
either the front or rear table mounts will bring this into alignment.
If it's not burning or causing kickbacks and the cut quality of bevel
rips is acceptable, .008" really is not too bad.
On Thu, 22 Apr 2004 13:57:32 -0500, "John, in MN"
<[email protected]> wrote:
>Today is my annual fix-up and tool checkout day. When going over the
>PM-66 TS, I checked blade to miter slot alignment which looked good
>but then tilted the blade 45 and checked again. Off about .008 from
>front to back of blade. Never checked this before because of not
>having a dial indicator at the time. Seems to be something that could
>be tweaked a little. Is this corrected by shimming the saw top front
>to back? Couldn't find anything dicussing this DAGS.
>Thank's for any info.
On Thu, 22 Apr 2004 21:38:10 GMT, Tom Veatch <[email protected]> wrote:
>My reason for recommending this is when you start shimming, if you introduce a left/right tilt in the table top, then the axis of
>rotation used to raise and lower the blade will not be parallel to the table top and the blade alignment with no tilt will vary with
>depth of cut.
>
Major brain fart, please ignore.
Left to right tilt on the table is easily accommodated with adjustment of the 45/90 degree arbor tilt stops. The effect described,
alignment changes with changes in depth of cut, indicates the depth of cut axis is not parallel with the arbor rotation axis.
Depending on the design of the trunnion assembly, there may be adjustment provisions, but far more likely this would be either a
defect in the machining of the trunnion or warpage in the trunnion after machining - a defective trunnion in either case.
However, my recommendation remains the same. If it ain't broke, don't fix it..
Tom Veatch
Wichita, KS USA
On Thu, 22 Apr 2004 13:57:32 -0500, "John, in MN"
<[email protected]> wrote:
>Today is my annual fix-up and tool checkout day. When going over the
>PM-66 TS, I checked blade to miter slot alignment which looked good
>but then tilted the blade 45 and checked again. Off about .008 from
>front to back of blade. Never checked this before because of not
>having a dial indicator at the time. Seems to be something that could
>be tweaked a little. Is this corrected by shimming the saw top front
>to back? Couldn't find anything dicussing this DAGS.
>Thank's for any info.
I've been wondering about this one also.
anybody have a link to an advanced cabinet saw setup page?
"Pounds on Wood" <[email protected]> wrote in message
news:[email protected]...
> Yes. It's a procedure that should always be done as part of a TS tune-up,
> but seldom is.
Could something like this be fixed by the use of blade stabilizers? I'm
wondering of the little bit of stress caused by the tightening of the arbour
nut might create this type of slight mis-alignment?