Richard wrote:
On 1/28/2015 10:58 PM, Terry Coombs wrote:
Got any stepper motors for cheep? I think nema 34's will work ,
I want to power the X axis and maybe the Y on my benchtop mill . I
have (or have components to build) controllers and power supplies ,
can fabricate mounts and the rest in house . I actually had an 18v
HF drill motor all but mounted , using a PWM controller and a 13.5
volt supply . At the speeds I need it didn't have enough torque -
though I may revisit that setup now that I can cut gears .
And speaking of cutting gears , how about cutting pulleys for
cogged belts , anybody got experience doing that that they'd like to
share ?

It has been a while since I played around making wheels for belt
drives. We were fooling around with belt drives for small aircraft
using VW, Subaru, and several two cylinder two-strokes.

Chuck modified the cutter to match the tooth profile of a Gates belt
and we made a dozen or so wheels using a manual gear cutter.

In the end, we got a couple of engines running well, but the weight of
even small auto engines was excessive. At least for what we were
trying to do.

The one thing I can remember clearly about cutting belt drive wheels
is - don't back up!

I'm thinking something much smaller , like a 4mm tooth/notch profile .
--
Snag