Re: [CAD_CAM_EDM_DRO] Digest Number 536

I Didn't like MAXNC's motor mount hardware. Stepper motors have *NO*
tailshafts, so you loose the handwheels. But then I think I might like
the keyboard commands better. Immediate commands, already thinking in
G-code (G0 X1.0...). You have jog also.

[While it's disconcerting not to have handwheels if you're used to them,
after a while you won't miss them. The MaxNC was designed from scratch as a
CNC mill, so it never had handwheels. For rough positioning use the jog
buttons, and if you want to be precise use the mdi commands.]

NOTE: old Sears mills will need a new set of X & Y lead screws also.

My plan is to run the MAXNC code/motors/driver until I see what it can
do, then eventually (possibly) change over to step/direction, bigger
steppers *WITH* tailshafts. The MAXNC driver/motors can then run
another project.

[If you do get two-spindle motors, you might consider using the back ends
to mount encoders, instead of handwheels. That way, you can set up a
closed-loop system.]

Look at FlashCut, Nice program, but you have to buy their "signal
generator" and then the motor drivers (figure on $1000+ before you get
to the drivers/motors). Saw it run in Palo Alto, CA. They have a Retro
kit for Sherline also (you have a Sherline I take it?), looks like
plates and spacers.

[Rumor has it that Flashcut is working out a closed-loop system based on
the J.R. Kerr Pic-servo chipset, although I have no idea how they will be
pricing it.]

Andrew Werby
www.computersculpture.com

Andrew Werby - United Artworks
Sculpture, Jewelry, and Other Art Stuff
http://unitedartworks.com