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Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Mon Sep 06, 2021 10:47 pm
by jsburger
JPG wrote: ↑Mon Sep 06, 2021 10:31 pm
MIKE: STOP and think this through.
The way tubes stop at slightly past 90°.
Normally this causes the table to slope towards the operator and weight/quill pressure forces the table further away from the 90° position. The stop screw 'dimple' is off center so the tapered end of the stop screw contacts the sloping edge of the dimple. This creates a must back out screw to 'lower' the waytubes etc..
In the reversed assembly the over 90° stop causes the table to slope towards the way tubes away from the now operating position and weight/quill pressure forces the table back towards the 90° vertical. This creates a potential for falling back to horizontal. The stop screw/dimple is not affected.
Grinding away the casting will INCREASE the past 90° overtravel, NOT decrease it and yes the stop screw would be positioned more towards the center of the dimple. Further more it will
increase that which you are trying to eliminate(makes table further from horizontal).
If you are concerned re drawer sloping. simply mount it horizontal(further from table at the front than at the rear).
Using the assembly reversed increases the potential to fall back, so making the way tubes 'vertical' exacerbates that further.
Thank you JPG. I was typing that kind of response when you posted.
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Mon Sep 06, 2021 11:26 pm
by Mike
Ok, so wanted to make sure it was as I stated, please see pics. Thanks
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 2:03 am
by JPG
Well yer half correct.
Where thee err is the direction of the over 90° tilt.
You complain that the table is not horizontal. Grinding will increase the over 90° tilt.
Earlier you wanted to make the table horizontal. Doing so increases the probability of the scenario you created above.
So what is thy desired outcome. Others have successfully created the backwards shorty and not experienced the failure you described. Neither did they stress over a non-horizontal table.
Now IF the table/vertical way tubes currently slant towards the new operator position, something is wrong. That would be under 90° rotation.
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 2:29 am
by JPG
1) Is your base a greenie? If so are your bench tubes 1 7/8" od?
2) make sure both the bench tubes are NOT riding on TOP of the stop rib. The 'upper one in your earlier pix MAY be.
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 7:04 am
by Mike
JPG- I am correct in my description of the existing condition I am explaining. The failure has not happened, hitting operator in head, probably never will, ,but could.
Your comment “ Now IF the table/vertical way tubes currently slant towards the new operator position, something is wrong. That would be under 90° rotation.” is also correct and the existing condition I am trying to show.
The desired outcome is a perpendicular table to the floor per the title of my post.
I understand others have created a backwards shorty and did not stress over a non-horizontal table but everyone has their own opinion and to me it is not as it should be. No stress just a fact, for me. That is why I posted my question.
Not a greenie.
The rib could be a possibility, thanks for the input, will let you know.
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 9:06 am
by ShoptimusPrime
If there is a gap between the bench tubes and the tilt base, could you add a shim to the top of the tube where the clamp is underneath, to take up the gap and re adjust the tilt? Could be that there is a slight gap or difference in the casting where it was drilled out to fit the bench tube. Maybe cut the walls off a few soda cans to make the shims. Just an idea. I do see your concern and it is something I've thought about as well in doing a shorty drill press.
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 9:14 am
by dusty
I have not read this entire thread but I must agree with you that your tilt is incorrect' Grinding, however, as others have said will not help. You will not get the Way Tubes perpendicular to the floor without doing something that most all of us do not do. In the drill press mode, the tubes are not suppose to be vertical. It is a safety factor.
You have chosen to mount the table, carriage and the headstock 180 degrees out of normal. If they were in the normal position, the table tilt would be as intended.
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 9:50 am
by DLB
dusty wrote: ↑Tue Sep 07, 2021 9:14 am
I have not read this entire thread but I must agree with you that your tilt is incorrect' ...
Both of my Marks are Double TIlt so I ignored those but I mocked this up on a Base Assembly with a couple of short tube scraps and I measured 90.0 degrees with my Wixie. This was a new style Base with the smaller diameter hinge bar and setscrews on the 'top.' Is this angle, and/or deliberate under- or over-rotation, something that was changed at some point? I'll look around for another Base to try this on...
- David
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 9:58 am
by edma194
If you unlock it will the way tube assembly go all the way back to the point you want? Is something preventing it from moving that far besides the lock?
Re: Shorty Drill Press not perpendicular to floor, any ideas?
Posted: Tue Sep 07, 2021 10:37 am
by dusty
DLB wrote: ↑Tue Sep 07, 2021 9:50 am
dusty wrote: ↑Tue Sep 07, 2021 9:14 am
I have not read this entire thread but I must agree with you that your tilt is incorrect' ...
Both of my Marks are Double TIlt so I ignored those but I mocked this up on a Base Assembly with a couple of short tube scraps and I measured 90.0 degrees with my Wixie. This was a new style Base with the smaller diameter hinge bar and setscrews on the 'top.' Is this angle, and/or deliberate under- or over-rotation, something that was changed at some point? I'll look around for another Base to try this on...
- David
Are you saying that you get a reading of 90.0 degrees after zeroing on a Bench Tube.