I thought about making one of those for roughing out carvings & parts. I've seen pantos like it, so It make work for you, but I'm pretty sure you'll want to take It further, and end up adding that z. Speaking of guitar makers, I saw a few videos recently with some guitar makers that made pantos out of some wood, drawer slides and other odds and in's, pretty ingenious setups, although l don't know how well something like that would work for our purposes. Working and being ideal in this hobby don't always go hand and hand unfortunately if you know what I mean. Often We have to keep on improving on things as we go.
I made My panto the same way as your doing, a little at a time, only about 8-10 years back. It took years for me to find deals on stuff that I thought I could modify to work. and save enough stuff up to complete It. I have to admit for what It was It was kind of a long road for me, but eventually I got there.
I could machine many of the parts Myself today, but back when I was building It, I was sort of roughing It. I did not have much more then common hand tools to work with, and later on a small metal lathe, so I did the best I could with surplus parts. It was inspired By Chris's Machine, but originally the only part that was truly the same was a Taig milling attachment that I used for the "Z". It was cheaper for me to buy that then to make It at the time. After I got a deluxe lathe, A machinist friend and customer of mine at the time Made a couple of bracket/adapters that fit the dovetail for me, and that I bolted to the assembly so that I could mount It to the lathe, then use the indexer, and cross slide on that to hold My cues, and inlay slabs.
Eventually I wanted It stand alone, and so bought a 4 foot bed way and a few other Things from Chris, and mounted It to a piece of 80/20.
It's very tedious work using pantos to begin with, when making one the way I did, and being limited on what I had to work with. It's even more so, especially squaring everything up, running into imperfections, and flaws in the setup, and improving as you go. I had to do a lot of tweaking, and It took a lot of practice before I was able to make everything work properly. It worked, but getting It to work as well as possible, and knowing what the limitations were took some doing. I spent a lot of time with a continuous neck ache from sitting over It and looking down while testing and working with It, but with enough patience I improved upon It, and got better at using It.
Suggestions that may help you as you go, some of this is assuming that you will end up going with a z axis.... Don't cut your rod, keep that wider platform you have going there, and just buy another one if You don't already have one by some chance. It will be much more stable with a wider platform. Mine being built out of stages has a skinnier platform, It's pretty darn rigid just the same, But I'm thinking about adding adjusters to stabilize It even more, because I do have a little bit of weight up top, and I'm concerned about that possibly wearing on parts over time. Your wider platform would automatically do that, and eliminate the need for them.
Your indexer... while I can't see It up close to fully examine, It looks very usable in the pictures, and I applaud Your ingenuity on that. You want to have a way to level the cue out, as I'm sure you have already figured, with the taper of the cue you have to offset for that somehow. 2 ways I see of doing this. (1) use a offset center (which Chris may sell to You) (2) make your tail stock so that you can adjust the height of It to account for that (actually I would make It as adjustable as possible, side to side adjustment would not hurt either).
On the bed way....I can think of many ways to make one and/or mount the HS&TS, and there are probably 10 other ways for each one, but If you can find a deal on a suitable piece of t-slot extrusion long and wide enough to work It will make things a lot quicker and easier.
Last thing build It as rigid as possible, but try to keep It lightweight too. The bed way and indexer don't matter as much weight may even help, but Use mostly aluminum on the moving parts, because It has both characteristics. May get away with phenolic plate also but I prefer alloy. Wood could work for somethings I suppose, but on average is not as rigid so I would avoid It if possible.
I could probably think of many other things, but It's a process and you'll figure out all the little kinks as you go and experiment. Nothing wrong with going ahead with what you have now to play around, think of It as an erector set, You have a bunch of parts and will probably keeping adding and modifying along the way, so the main thing is don't do anything to any of the main parts, that can't easily be undone and changed later when/if you make changes in the design.
Probably the best piece of advice I can give you, Is save Yourself a lot of heartache as well as anyone that may be thinking of purchasing, by not committing to any sales too soon. Please don't take what I say the wrong way because I'm being sincere when I say that, and chances are you may thank me for It after you get to playing around with the machine for the first time. I could be wrong but My experiences tell me different.
Good luck with It, looks like your off to a good start.:smile: If You build Your machine rigid enough Then you can cut Your own templates. I made this one out of Corian, but I can cut them from brass bar as well.
Greg