Re: [CAD_CAM_EDM_DRO] Re: servo brake problem

At 10:33 AM 8/27/2004, you wrote:

>Doug, I am not sure how the brake works. There is a solenoid that
>is air activated, but I do not know what the solenoid does. The
>other two solenoids positioned next to the brake solenoid are
>functioning and allow air to pass through to affect a spindle speed
>change. I assume the air pressure is required since the brake
>releases when I disconnect the air line. My problem is turning off
>the brake without having to disconnect the compressor. Does that
>shed any light?

Keith,

Sounds like the way mine works. It is extremely air pressure sensitive,
however. When I crank up everything, I have to turn on several things -
the air compressor ball valve, the valve on the BP air system and the
controller. My air compressor and cloths dryer share the same wall
plug. Un plug one and plug in the other. Since I use the a/c more than
the dryer it isn't unusual that I forget to plug the a/c into the wall plug.

Air bleed off isn't bad on my compressor, but with the combination of
forgetting to plug the a/c in and a small bit of bleed off I have cranked
everything up only to find it doesn't work. First time it happened I
almost started to dismantle the controller thinking something major had
gone wrong. Discovered the problem by accident, not chasing down
electricity etc.

The point is, when the air isn't working it doesn't present problems that
are immediately associated with air. No "flat tires", no escaping air
sound etc. My first thought was directed toward the electricity in some
form or other - bad connection, faulty thingy, burned out whatever. You
might want to check to see that sufficient air is reaching the
brake. Could be as simple as low pressure.

Good luck,

Doug C.
Houston, Tex.