Mini wannabe datron build

thanks

I'm stuck now anyway. I ordered some "precision collet reducers" and one wound up with 0.0028" runout, and the other was 6.32mm instead of 6mm.

That's worse than even the most garbage $1 aliexpress collet reducer.

Sigh. now I need to figure out something else and likely wait weeks for it to arrive...

rodw wrote:

Whilst mesa and ethercat might coexist as they NIC they use are defined for each environment, the question is why do that?
Ethercat can do everything a mesa card can do and then some.

Um, cause the machine is already running on the mesa and i just want to add one motor?

Not sure why you guys think a stepper would somehow be better than a servo? a nema 17 stepper has less torque than a 100w servo. I dont think inertia would be an issue on such a tiny magazine (only 120mm diam). it will only be moving about 100rpm with quite low acceleration.
 

I buy stuff from CTC tools ex Hong Kong who don't sell garbage. Last buy was ER20 collets. If they don't have a listing they might source it for you.
As far as shipping, I have had stuff arrive from them in the same time as stuff ordered from interstate in Australia
www.ctctools.biz/

k, running my tool mag properties through yaskawas calculator to figure out inertia. you do quickly get out of range, but the 40mm 50w will be fine as long as i take some time accelerating. 1-2 seconds to get up to speed.

This doesnt need to be high performance, just for function testing.

Thanks. they don't have them. they are pretty impossible to find. I got these ones form amana tool, which I had thought would be reputable, but nope.

(for the record, anything worse then 0.0005" would be unacceptable here)

ihavenofish wrote:

k, running my tool mag properties through yaskawas calculator to figure out inertia. you do quickly get out of range, but the 40mm 50w will be fine as long as i take some time accelerating. 1-2 seconds to get up to speed.

This doesnt need to be high performance, just for function testing.
 

Understood.  Earlier post was just a mild warning, not a hard THOU SHALT NOT sort of thing.

And if you don't feel like fiddling with ethercat, maybe plug in a 7i85s to get another bucket of S&D outputs for the ATC motor?  Assuming you've got a spare port, of course.