Wow, Tom- long post.
Please excuse my brevity in replies.
1.the pnc1000A driver works, the 1000 driver doesn't - you're right.
2. Too slow for what or who? Yes, I'd like a faster one, but it still works. I can still only weed so fast. Just schedule your time to work with it. Given a choice, I'd prefer a wider one than a faster one- if I was given the option. IN the meantime we use what we have.
"Most shops"...no idea, I have not surveyed "most shops". We order the vinyl in 20" widths - 510mm - sometimes we get that, and sometimes they send us 24" vinyl cut back to 20" plus the 4" offcut.
I have never used 15" vinyl. The plotter will fit 24" under the top, but it's only capable of cutting on the leftmost 465mm width in the 20" span.
3. Tractor feed...no idea- never used it. "Most newer cutters" seem to have sensing so they can correct their deviation if going offcourse- if they're a top brand. If they're a cheap brand, you can expect anything. These PNC1000s were not high technology like newer ones- but they were built to last.
I'm not aware of many with tractor feed except the famous one that prints on vinyl, but I've had a brain freeze (sleepy) & can't remember the name.
Lining it up straight- don't worry- it has a default length of a whisker over 1.5 metres, and I have never been able to work out how to force it to go beyond that. You learn to tile the work in 1.5 metre portions to accommodate that. You still need to and can line it up to run straight. I've done 5 sets of 1.5 metre plots, and had it still on course- it's a matter of experience. It also depends on your software- Flexi has a "show me" option where it runs out the size of the sheet needed, and runs it back, so you can see if it'll fit & stay where you hope it will. Corel doesn't.
"Running banners"- we often paint them, or if we have to use vinyl, we still tile it in 1.5 m peices or less. If you are careful, you can set it to tile, but also run continuously where the tiles touch, but it's easy to get it wrong, so I just do it between letters instead.
8 feet- you won't get this- only 5 of them, so split the job into 2 lots of 4 ft instead.
4. Cutting force - there's a slider on the far right near where the printer cable plugs in- set it in the middle (zero). It should be fine. If it's cutting right through, I'd suggest your blade pokes out below the holder too far. Perhaps if you can't adjust it, I'd suggest buying an adjustable holder, and set the blade tip to poke out about 0.5mm, or about 1/16".
5. To cut the page off asfter being plotted, just run a knife/razor along the front of the sloping part of the body. This PNC1000A has an option on the console called "page". After a plot is finished, I press "page" and it feeds the vinyl forward to the end of the plot, and forward the 1 3/4" extra to the front of the machine for a straight cut with an exacto knife or whatever you have. After you've cut it off, just leave the machine alone, & sent the next file to plot, and it'll automatically feed back the 1 3/4" , and start again.
I think with the other plotter, (pnc1000-without the A) you can use the forward arrows to feed it forward, to cut it off, but I don't remember. When it's lined up well, I try not to lift the pinchwheels if I don't have to, till I change vinyl. I don't really remember.
It has never had an auto cut-off that I am aware of.
6. Scrap vinyl: I used to keep backing paper & tape scrap vinyl to that, so the vinyl may be 8" wide, but the paper is the full 20" wide. It's tedious, the stuff can buckle, you can get it wroong, and these days I find other uses for the offcuts, like masking screens for screenprinting.
With better newer Rolands, you can fit any width of offcut under it. I think with the PNC1000, you can shift both the pinchwheels to the far right, and use about 3 3/4" wide strips.
It'll sense that that is what you have, usually. (You won't get 6" between the pinchrollers.)
I don't know what your 'normal' origin is- sounds like the left side. In any case it depends on the setting of Rotate in the console. Rotate = Y shifts the origin from the left to the right of the machine, or vice versa. It also flips the page orientation from landscape to portrait. (Or it may be y=90, I forget which machine has which options or how they word them.) IN Flexi, I have to have it one way, in Corel, rotate has to be the other way. With Win XP it had to be one way, and with Win98se, it had to be the other way, even in the same program. NO idea why, but it just wouldn't work with the alternative options.
If I move the pinchrollers, it senses where I have shifted them to. There must be a kind of limit switch or limit encoder or something hidden somewhere.
Hope that helps. It is not modern technology compared with today's stuff, so you really can't complain. If you want better, you buy a newer machine- they're really nice-instead of an old noisy dinasaur. Otherwise you learn to work with it, or farm-out the work you can't manage.