advice on DRO scales

[mtraven]

I don't know if this is right, but I wouldn't do it that way because that bull nose center is going to influence the cut. If its rigid enough to face...

[mtraven]

hmm...I suppose it could be the angle of the photo, but it really looks like that right insert is tipped down relative to the other. and I too can't...

[mtraven]

pretty sure I said that.



there is also a length difference(likely for facing as Bented pointed out), but there is 100% also...

[mtraven]

this works if your going from ID -> OD or visa-versa. but if you wanted to cut with the 2nd insert on the other of the bore, you'd still need to reverse...

[mtraven]

CA glue? 😁

if I'm not mistaken, thats kurtis @ CEE? I've watched a lot of his videos, he works on big stuff & I've never seen a...

[mtraven]

you get me! the one I had in mind was coordinating the spindle speed with the cutting diameter when doing long facing cuts. Your ideas are interesting...

[mtraven]

cost is fairly low on the list of why I'd like to do this (see my other posts)

curious what makes you think an arduino based dro brain would...

[mtraven]

I already did the caliper thing, that was the proof of concept I needed to warrant buying proper scales. I just want to build the brain for several reasons:...

[mtraven]

here is my early pick:

https://www.amazon.com/Mophorn-Accur...d=1LHF79ETRXFF...

[mtraven]

I'd argue there is sense in reinventing things, from both an educational & explorative standpoint...I'm also a bit of a contrarian😁.
...

[mtraven]

Recently, I fashioned a single axis poor man's dro with a caliper & a few brackets. I really like having the dro, but my makeshift version is a little...

[mtraven]

if I didn't have HSS around to grind a trepanning tool, that'd be my go to as well as I have a variety of hole saws. two things to keep in mind: ...

[mtraven]

so its used a lube / coolant? never heard of that one, but I've done almost no copper work. I assume there is a better / modern version of copper lube?...

[mtraven]

i'm missing something, please explain.......

[mtraven]

Just throw out my two cents: My lathe had no lube specs with it whatsoever, so I've experimented a bit:

for a while I used hyraulic oil...

[mtraven]

i've done that too, works pretty well. even if he doesn't have the serrations, a simple spider would do the trick in a 3 jaw. though re-reading his...

[mtraven]

as BC said, granite is granite. As far as I can tell, the rock I picked was a pretty hard granite with a very fine structure to it. I don't have the ability...

[mtraven]

my method choices per quantity:

<10 --basic od reg + CA glue (assuming I don't have an appropriate step collet)

10-50 --...

[mtraven]

thanks! I actually started with a 10# sledge--there was a really obvious fault running through the rock & it need to come off---plus I REALLY didn't...

[mtraven]

paul-- thanks for the reality check on making lenses, I needed that. I was thinking that lens would be hundreds (i have no frame of reference). and its...