501337 CAM - Control, Shop Smith Mark VII

[jafpanda]

Is anyone looking or have information regarding the 1963 Mark VII Part number 501337 Cam - Control?

PN 501337 Cam - Control, 1963 Mark VII

IMG_6700.jpeg (572.57 KiB) Viewed 2781 times

[edma194]

Should be multiple threads on this subject. Here is one to get you started: viewtopic.php?t=21276

[jafpanda]

Thanks Ed, I’ve seen many of the posts regarding the woes and advice surrounding the original Speed Control CAM.

It was molded from a plastic like (Delrin 500) material.
Typically it would melt as a result of the CAM Follower’s bearing seizing up.

The Delrin 500 NC10’s temperature of deflection under load, 1.80 MPa is about 93 degrees C.
Just guessing, but I think it was a design decision for it to fail when the CAM Follower’s bearing required replacement. Bearings that reach 100 degrees C aren’t really useful.

I had a bunch of Mark VII stuff scanned into a computer… but then the hard drive crashed.

Somewhere I have an original blueprint of the CAM along with original manuals. The BP was pretty hard to read since the quality wasn’t very good. I made about 20 CAM parts (CNC from Delrin) and 1 from aluminum about 15 years ago.

I’m thinking about recreating the 3D CAD and a 2D drawing to see how well a 3D printer would compare to the CNC parts I have.

So, bottom line… is there anyone out there that would be interested in this topic?

[GetterDone]

Thanks Ed, I’ve seen many of the posts regarding the woes and advice surrounding the original Speed Control CAM.

It was molded from a plastic like (Delrin 500) material.
Typically it would melt as a result of the CAM Follower’s bearing seizing up.

The Delrin 500 NC10’s temperature of deflection under load, 1.80 MPa is about 93 degrees C.
Just guessing, but I think it was a design decision for it to fail when the CAM Follower’s bearing required replacement. Bearings that reach 100 degrees C aren’t really useful.

I had a bunch of Mark VII stuff scanned into a computer… but then the hard drive crashed.

Somewhere I have an original blueprint of the CAM along with original manuals. The BP was pretty hard to read since the quality wasn’t very good. I made about 20 CAM parts (CNC from Delrin) and 1 from aluminum about 15 years ago.

I’m thinking about recreating the 3D CAD and a 2D drawing to see how well a 3D printer would compare to the CNC parts I have.

So, bottom line… is there anyone out there that would be interested in this topic?

I will be when I get time to check the condition of the cam in the one I purchased recently.

I have not had time to use it yet.

[JPG]

Interested? You are asking one who paid $80 for a cnc aluminum one a few years back.

And more recently 3D printed one.

Yes I think so!

[jafpanda]

Thanks JPG for the interest.
I’ve begun the restoration of the CAM ~ Control documentation.

The original Magna American Corporation (9-18-1963 revision “C”) blueprint is the basis to recreate an ANSI C size 2D drawing and subsequent blender 3D CAD model.

[JPG]

If you post (or e-mail) to me the full drawing at the same resolution, I may be able to improve legibility similar to partial effort below.

The original being an "E" size document may require it being done in sections. Focus is critical!

mvii cam draw b4 after.jpg (461.29 KiB) Viewed 2583 times

[jafpanda]

Thanks JPG,

The blueprint note, "FULL SCALE" image on the print I have measures to the actual part size; it is correct.
Therefore, the blueprint note, "SCALE 2 x SIZE" implies that the print dimensions are doubled.
Additionally, the blueprint measurement is 17 x 22 (ANSI C dimensions).
The attachment shows a Mark VII CAM part against an 8.5x11 printed document that I made (so far).
The outline on the drawing is slightly covered by the part.
So, I'm pretty confident that the dimensions on the drawing are quite good.

I'll post a 8.5 x 11 pdf of the drawing I'm making in a bit.
I would appreciate any comments for correction.


Selfless Caveat: I'm no draftsman. The last time I touched a drafting board was in the 70's.

Mark VII CAM part against 8.5x11 printed document.jpg (139.57 KiB) Viewed 2579 times

[jafpanda]

Comments and corrections are welcome

PDF is a better resolution

CAM_Control_PN_501337_DWG.pdf

CAM-Control ShopSmith Mark-VII Magna American Corp, Restored C-Size Drawing

(557.03 KiB) Downloaded 117 times

PNG resolution is still good

CAM_Control_PN_501337_DWG.png (588.03 KiB) Viewed 2567 times

[jafpanda]

1st shot at a 3D model

IMG_6733.jpeg (88.57 KiB) Viewed 2558 times