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Posted: Thu Feb 16, 2012 10:12 am
by camerio
It is too late to ask, but maybe you could have taken a picture of the adjustments while doing it under the table. Anyway I think I understand.
Posted: Thu Feb 16, 2012 10:14 am
by algale
dusty wrote:Algale: To you I am indebted. Your comments sent me off on an excursion that really paid off. I now much better understand the Mark V table alignment.
If you had not commented on the trunnion bolts, I would still be battling my centerline issue and would have added to that the drill press issue.
By loosening all four trunnion bolts and then repositioning the main table while taking into consideration both parallelism and drill press centerline, I have resolved both issues.
I now have spare rubber bumpers coming from Shopsmith. With the carriage slid up against the old bumper, the saw blade is centered on the insert centerline. Mystery one solved - solution: correct the table positioning before alignment. Pushed table toward the headstock and pulled the table to the infeed side simultaneously and then aligned for parallelism while taking care to move the table no more than absolutely required.
Dusty,
I'm glad something I said was of help to you in this instance. I've gained so much knowledge from reading your innumerable contributions to this forum that any debt of gratitude is owned by me to you and not the other way around.
In fact, I will try your solution this weekend and see if I get as good results as you achieved. Did you find the movement of the table to be in exceess of 1/16th in any direction or did you not take measurements?
Al
Posted: Thu Feb 16, 2012 10:35 am
by dusty
algale wrote:Dusty,
I'm glad something I said was of help to you in this instance. I've gained so much knowledge from reading your innumerable contributions to this forum that any debt of gratitude is owned by me to you and not the other way around.
In fact, I will try your solution this weekend and see if I get as good results as you achieved. Did you find the movement of the table to be in exceess of 1/16th in any direction or did you not take measurements?
Al
I was in the mode of doing a lot of unnecessary things to fix a really insignificant problem. Your comments made me stop and think. Not the first time but later when I reread the posts (something I often do).
With regard to actual movement, I cannot tell you "how much" it moved freely in all directions. It seemed like "a lot". With that, I tore into it without any quantitative analysis (something else I often do).
Posted: Thu Feb 16, 2012 10:36 am
by algale
dusty wrote:[ATTACH]16274[/ATTACH]
Dusty,
Speeking of my indebteness to you, do my eyes see a modification to the pistol grip on the miter gauge? Looks live you've mounted added a spring that the hold down runs through, presumably to apply pressure even when you can't be holding the pistol grip? That solves a minor complaint I had with the grip, which is that sometimes you want it to do the holding while you keep both hands free for other operations. Pretty nifty!
Al
Posted: Thu Feb 16, 2012 10:39 am
by dusty
algale wrote:Dusty,
Speeking of my indebteness to you, do my eyes see a modification to the pistol grip on the miter gauge? Looks live you've mounted added a spring that the hold down runs through, presumably to apply pressure even when you can't be holding the pistol grip? That solves a minor complaint I had with the grip, which is that sometimes you want it to do the holding while you keep both hands free for other operations. Pretty nifty!
Al
Yes, there has been a spring added to the safety grip (for the very reasons you stated). I cannot take credit for the ingenuity though. I picked the idea up from a forum comment somewhere.
If you install one, keep your fingers out from under it. It slams down pretty hard. Don't ask how I know.
Posted: Thu Feb 16, 2012 11:02 am
by JPG
Glad to see you got the blade 'centered'. This thread has exposed many things other than table alignment to the holes that will affect that. I would think that the tolerances on those other things would create greater variation.
We still do not know if the smaller rear trunion holes was intentional or an oversight, but now have a way to adjust around it.
Now where is the drill line 'supposed' to be?;) I vote for centered to either the shaper round hole or the blade insert 'narrows'.
FWIW I think we(you!) have attained a goal not envisioned by the designers of this equipment!
This journey has been interesting! Thanks to all who traveled there.
Posted: Thu Feb 16, 2012 12:06 pm
by dusty
[quote="JPG40504"]Glad to see you got the blade 'centered'. This thread has exposed many things other than table alignment to the holes that will affect that. I would think that the tolerances on those other things would create greater variation.
We still do not know if the smaller rear trunion holes was intentional or an oversight, but now have a way to adjust around it.
Now where is the drill line 'supposed' to be?]
I sorta wish you had not asked that question right now. Here's why.
[ATTACH]16275[/ATTACH]
They are on the center line of the arbor (the drill line) but offset on the other axis.
One is the shaper insert (smaller) and the other is the drum sander insert (larger).
I don't do much shaping so I am unable to comment as to why the hole in the shaper insert is offset as it is.
Note: the vertical line is the drill line and the horizontal line is the insert center line.
Posted: Thu Feb 16, 2012 12:15 pm
by JPG
dusty wrote:I sorta wish you had not asked that question right now. Here's why.
[ATTACH]16275[/ATTACH]
They are on the center line of the arbor (the drill line) but offset on the other axis.
One is the shaper insert (smaller) and the other is the drum sander insert (larger).
Relax Dusty. There is no need for the round table inserts to be in any particular location (left to right)[in/out when vertical]. But being on the drill line
is relevant.
Let this be. It is a .non-issue.
Posted: Thu Feb 16, 2012 12:56 pm
by dusty
JPG40504 wrote:Relax Dusty. There is no need for the round table inserts to be in any particular location (left to right)[in/out when vertical]. But being on the drill line
is relevant.
Let this be. It is a .non-issue.
I realize that and I realize that by adjusting the table either insert can be centered on its center line.
I am curious as to why one is manufactured centered and the other is not. There is a reason. I have learned that the Shopsmith was designed by a skilled engineer. It did not just happen.
Posted: Thu Feb 16, 2012 3:43 pm
by JPG
dusty wrote:I realize that and I realize that by adjusting the table either insert can be centered on its center line.
I am curious as to why one is manufactured centered and the other is not. There is a reason. I have learned that the Shopsmith was designed by a skilled engineer. It did not just happen.
My bump has been aroused as well! However I do not have the two versions to ponder.
Only thing I have come up with is that offset brings the opening closer to the shaper fence. (assuming it is offset that direction).