New Mark 7

SDSSmith · Post by **SDSSmith** » Thu Sep 23, 2010 5:56 pm

Did Shopsmith upgrade the knob that is used to secure the table tubes (see above picture)? Shopsmith also seems to have done away with the "pony tail" see below on the headrest picture.

I would like to see a close up of the locking knob that holds the arm on the pivot bar.

dusty · Post by **dusty** » Thu Sep 23, 2010 6:23 pm

[ATTACH]10490[/ATTACH]

[ATTACH]10491[/ATTACH]

SDSSmith wrote:http://www.shopsmith.net/forums/attachment.htm?attachmentid=10467&d=1285202970Did Shopsmith upgrade the knob that is used to secure the table tubes (see above picture)? Shopsmith also seems to have done away with the "pony tail" see below on the headrest picture.
http://www.shopsmith.net/forums/attachment.htm?attachmentid=10463&d=1285202924

I would like to see a close up of the locking knob that holds the arm on the pivot bar.

I am not sure I would consider those larger knobs to be an "upgrade". They would make it easier to crank down on the tubes with less effort but why would you want to do that?

Are these two pictures (200603 & 200625) that depict the same headrest or are these pictures of the two opposing ends. If they are the later, this Mark 7 pivots on both ends.

It seems that anyone can make their Mark V do that by simply replacing the
Headrest (13) and Way Tube Tie Bar (26) with a Base (1) and Base Arm (24). Easy removal of the pivot pin (on either end) and a locking method (both ends) in the horizontal mode would be the design problems.

I suspect now that pictures will show these issues to have been resolved already.

Now if we can figure out how the shaper table works.....

SDSSmith · Post by **SDSSmith** » Thu Sep 23, 2010 8:43 pm

dusty wrote:[ATTACH]10490[/ATTACH]

[ATTACH]10491[/ATTACH]
I am not sure I would consider those larger knobs to be an "upgrade". They would make it easier to crank down on the tubes with less effort but why would you want to do that?

Are these two pictures (200603 & 200625) that depict the same headrest or are these pictures of the two opposing ends. If they are the later, this Mark 7 pivots on both ends.

It seems that anyone can make their Mark V do that by simply replacing the
Headrest (13) and Way Tube Tie Bar (26) with a Base (1) and Base Arm (24). Easy removal of the pivot pin (on either end) and a locking method (both ends) in the horizontal mode would be the design problems.

I suspect now that pictures will show these issues to have been resolved already.

Now if we can figure out how the shaper table works.....

I suspect that the base arm now has a slot in each end that engages the pivot pin.

JPG · Post by **JPG** » Thu Sep 23, 2010 9:46 pm

SDSSmith wrote:I suspect that the base arm now has a slot in each end that engages the pivot pin.

Slots are evident in 'video'!

damagi · Post by **damagi** » Fri Sep 24, 2010 10:30 am

I attached a composite screen capture from the video. Based on looking at it, I think that by replacing the Headrest/Way Tube Tie Bar assembly with a base and base arm then you will indeed have what was shown in the video. I also attached a mockup of a proposed modification to the casting that appears to match what is in the video. Basically make two cuts to allow the pivot bar to come free, plus a screw that will synch the base to the pivot bar.

[ATTACH]10492[/ATTACH]
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dusty · Post by **dusty** » Fri Sep 24, 2010 11:19 am

damagi wrote:I attached a composite screen capture from the video. Based on looking at it, I think that by replacing the Headrest/Way Tube Tie Bar assembly with a base and base arm then you will indeed have what was shown in the video. I also attached a mockup of a proposed modification to the casting that appears to match what is in the video. Basically make two cuts to allow the pivot bar to come free, plus a screw that will synch the base to the pivot bar.

I believe that you have this nailed. I did not understand completely until I took my extra Base and Base Arm Assembly apart to look at it. All that is needed is some sort of cam or lever that can be secured around the pivot rod.

However, now that we have a Mark V that pivots at both ends, what are we going to do with it when it is vertical on the left side.

The Main Table, as is, is dysfunctional when vertical on the left side because it will tilt only about 48°.

dusty · Post by **dusty** » Fri Sep 24, 2010 11:38 am

dusty wrote:I can't tell whether this is the same or not.

[ATTACH]10476[/ATTACH]

After playing with my photo editor for a while, I have affirmed that this is NOT the knob shown in the video freeze frames. It is in the right general area but with the wrong Base and Base Arm.

If you watch the videos very closely, you'll be able to see the knobs (both ends, different times).

Absolutely ingenious engineering. It appears that there are no lost parts, just some re-milling and the addition of some sort of locking device; a knob controlled lever that grabs onto the pivot pin to hold the whole assembly in position.

SDSSmith · Post by **SDSSmith** » Fri Sep 24, 2010 11:38 am

And the knob in the new swing arm looks like the knob on the fence rail in the picture of bstadtler's new machine.

dusty · Post by **dusty** » Fri Sep 24, 2010 11:51 am

SDSSmith wrote:
And the knob in the new swing arm looks like the knob on the fence rail in the picture of bstadtler's new machine.]

Yup, you are right.

beeg · Post by **beeg** » Fri Sep 24, 2010 12:47 pm

Still looks like a 500 series powerpro to me.