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This makes me wonder, are Dolev, Lotem and EverSmart machines still used in production?

I admit that up-keeping my ancient equipment is a challenge. Recently it became even harder since Kodak refused giving me even minimal support - not even (paid) technical advice. Seems to me Kodak wishes that all their old equipment will be junked. Well, this oldtimer (me) has other plans.

Scitex/Creo/Kodak Oldtimers may still remember and help: I wish to convert a Brisque "Express" (IBM 7029-6E3 computer, AIX 5.1, Brisque s/w ver. 5.1.32) that formerly drove a Lotem800II Quantum, to drive our Lotem 800V2 (Diodes). I shall use "Output Device Handling" to communicate with Lotem...

It may be a good idea to include in your drawing a square with known/marked dimensions such as 100x100 mm. This will help assuring that dimensions were converted correctly.

Once, in the mid 70's, we received a thick bunch of pages to photograph and produce offset plates for a book. The text was ran on Phototypesetting paper and there were a huge number of corrections, single words and lines that were typeset separately and stuck on top of the original job. The...

That machine was considered real "High End". I did send out for that service when we needed higher quality with thin, even coverage of wax. Especially for waxing Stripping Film, when we had to place many small street names on city maps etc.

This waxer was great for use on the back of the Agfa-Gevaert Copyproof photo papers. Kodak had similar Diffusion Transfer materials family named PMT (Photo Mechanical Transfer).

The smell of melting wax had its' fans......

Mastering a Swivel Knife was part of the fun!

During the 80's there were different makers of computer driven Mask Cutting Tables. I remember warning a colleague I met at Drupa against investing over $100K in such a Dainippon Screen table. He dropped the idea and took my advice to look into buying a film image-setter instead.

I believe Rubilith masks were not suitable for reflected light photography, the shiny transparent Polyester base would reflect the light and mess things up. They could have been photographed by transmitted light, but not at the same shot that the paste-up was taken. Paste ups were usually shot...

"Copy and Paste" can be risky. Instead, you should use "Duplicate Layer" and rename the new, copied layer.

Did you try to Refine a file and test if this helped?

Refining in Prinergy greatly simplified complex PDF Vector Map files for me. Those where geographic maps files that were created in Freehand, converted and modified repeatedly in Illustrator with final, minor corrections with Pitstop. YMMV

Buying a used plate-setter without a compatible, working rip/shooter is highly risky. You must also have a skilled, competent, experienced (and hopefully not too greedy) technician around. Depending on the specific make and model and its popularity, spare parts may also be costly and/or hard to...

Use Pitstop "Add Bleed" Action List. https://www.enfocus.com/en/blog/how-to-fix-pdf-bleed-problems-with-pitstop-pro

I was told by a colleague that he "fixed" a rubber roller on his Lotem 800 CTP by using a suitably sized heat-shrink sleeve. Probably only a temporary solution but it may work for other quick fixes. YMMV

Note that different RIPs produce different flavors of 1 bit Tiffs that may be coded or specially compressed. Many RIPs require "3rd Party Rip" license ($$$).

Update: Plugging in our spare Focusing Motor Unit fixed the zeroing problem instantly. So far so good, thanks for everyone's interest.