Re: servo brake problem

Ray,

I appreciate that info! My manual does not discuss it that I could
find. I have been examining CR5 and have found 5 vDC present across
CR5 9 and 11. I was hoping to bypass these interlocks and control
the brake myself with my own relay through the computer. I assume I
could connect the wires controlled by these contacts and bypass them
(CR5 2 and 10 and CR2 2 and 10) Also CR5 11 and 9? CR5 6 and 7 are
probably not connected to the Estop switch anymore. Could I just
connect the wires coming to these contacts at the 4 places mentioned?

My spindle does turn now, but I had to disconnect the air and push
the button in the end of the solenoid to dump the air holding the
brake on. Now I do not have brake to allow tool changing unless I
temporarily reattach the air source.

We have completely rewired the limit switches and the estop switch
which are now connected to the computer via the motion board.

Thanks
Keith Clark

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Raymond Heckert <jnr@a...>
wrote:

> My manual (page 7-21) says: On machines with the brake option, the
> spindle brake is controlled by relay CR5. The spindle also is
> 'interlocked' through CR5. This relay must be energized for the

spindle

> to turn. The coil voltage should measure about 24 Vdc (CR5-2 to

CR5-10).

> If CR5 -2 is 0 Volts, then, CR5 is open, and the spindle won't

turn. A

> faulty E-stop switch to contacts CR5-6 & CR5-7 could also cause
> problems. Diode D38 may cause this problem. HTH
>
> RayHex
>
> Keith Clark wrote:
> >
> > The spindle solenoid and brake were already wired and working

before

> > the retrofit process began since it was a Boss 6 CNC Bridgeport

and

> > all the switches etc are already there. Problem is that I can't
> > figure out where the proper wire is that gives power to the

solenoid

> > for brake. <snip>