From: Stunt Engraver (DGL) [#5]
24 Mar 2006
To: Michael [#1] 25 Mar 2006
Michael,
It looks like a loose adjustment knob.
There are a total of 7 adjustment knobs, any of which, when loose, can cause the type of engraved character you've shown:
1) Knob that opens and closes the vise.
2) Knob that controls the sliding movement of the ratio bar.
3) Knob that holds the spindle in place.
4) Knob that locks in lateral movement of the workholding vise.
5) Knob that locks in vertical movement of the workholding vise.
6) Knob that locks in the overall vertical movement of the upper pantograph arm.
7) Knob that locks in up/down movement of the post the workholding vise is mounted to.
If that's not the cause, worn bushings or worn mastercopy are the next most likely causes.
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EDITED: 24 Mar 2006 by DGL
From: Harvey only (HARVEY-ONLY) [#6]
24 Mar 2006
To: Michael [#1] 25 Mar 2006
Have we finally given you enough answers to thoroughly confuse you?
If not we will try some more. :-)
From: Michael [#7]
25 Mar 2006
To: ALL
WHEW!
One piece of information I didn't realize I'd not included in the orginal post: the complete model number is GTX-U. Looking at some of the responses, it makes just a little bit of difference.
There are 10 (not 9) knobs and 3 (not 2) of them adjust the ratio.
The motor and pantograph slide from front to back along a ratio scale and is moved via a locking knob. One arm of the pantogaph is adjustable along another ratio scale and is moved manuall and locked into place via a small knob. The engraving heads (interchangeable diamond drag & rotary) move along a ratio scale on the pantograph arm opposite the arm with the scale metioned above. All three knobs are tight as are all other knobs.
I had not noticed that the master copy moved up and down in the copy holder tray...just a teensytinylittlebitty bit, but it seems Larry hit the nail on the head with that suggestion. I don't know how to solve that because not all pieces move. I'm open to suggestions.
Second problem is the age of the master copy. There is some noticable wear on many of the letters...not lots and lots, but noticable.
One problem I never imagined in my wildest fantasy is that how the letters are traced makes a difference, too. The shorter leg of the A was corrected by tracing that leg from bottom to top (no idea why, but the phenomenon is repeatable). The E was corrected when tracing as suggested.
WHEW!
As I learn the machine, trade and craft of rotary pantograph engraving I can probably guarantee I'll be back for more help.
Thanks muchly! :D
From: Stunt Engraver (DGL) [#8]
25 Mar 2006
To: Michael [#7] 25 Mar 2006
Michael,
Keep in mind you want to raise the workholding vise close to the diamond engraving spindle, so you don't have to extend the length of the spindle too much, in order to reach your substrate.
That can have a bearing on letter quality. It's much like the difference bewteen trying to write with a pencil, with your fingers close to the lead, as opposed to trying to write with your fingers close to the eraser.
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