Kirk Wallace wrote:

>Jon
>
>Might this driver work with my 1kw Sanyo P5's? What kind of control
>connection is available? Step/Dir, Quadrature or Parallel?
>
The command to the servo amp is PWM and direction, identical to my brush 
servo
amps.  This can be controlled by my Universal PWM controller.

> My current
>plan uses your Universal Stepper Board with Step/Dir into Rutex 2030's.
>  
>
The USC can be converted to a UPC by changing a socketed PROM.

>With your brushless driver, where would the PID tuning be handled?
>  
>
In the PC, right through the EMC2 gui.  You bring up a servo performance 
graph,
jog, observe the result, change a parameter and try again.  You can 
repeat this
about every 5 seconds until the response is what you find satisfactory.

>Currently, I have to reboot to Windows to tune the Rutex drives.
>
>(Off topic) Any updates on your Bridgeport conversion on
>http://pico-systems.com/CNCconv.html ? Any hints on a source for ball
>screws, automatic tool change, BT30 spindle?
>  
>
Well, the Bridgeport is pretty much a finished project.  Other than 
changing over from
the Servo-to-Go and an old PC to my own PPMC and newer PC and EMC2, there's
mot much going on there.  I am scraping in a saddle and knee from a BOSS 
machine
to eventually replace my saddle and knee.  My table and everything else 
is badly worn
after approximately 68 years.  I got the ball screws out of an Excellon 
circuit board
drill, but eBay is now a good source for ballscrews, if you are 
patient.  I got a new
(old stock) Bridgeport Y-axis ballscrew for $69 or something on eBay 
last year.  I'm
still looking for an X screw.  The old BTC tool changer is notorious for 
dropping tools.
I have no idea why it does that, or whether it is fixable.  An ATC is 
not trivial.
If you've seen how Mazak did it on the Micro V, you know there has to be 
a simpler way.
Changing the spindle on a Bridgeport is not trivial either, if you want 
to put a
different taper or quick change on it.

Jon

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