RE: [CAD_CAM_EDM_DRO] Spindle Start Delay - Do I need to build one in???

I am re-installing the manual control for the spindle as well as
allowing MACH to have control (selectable via toggle switch) and I
believe Bridgeport ran the brake power wire through both the FWD and REV
motor contactors so that when either contactor was actuated it would cut
the power to the solenoid holding the air cylinder extended and the
brake on. I think this was a safety feature to ensure the brake was not
powered and control was originated by a transistor somewhere in the
original controller (that I don't have). I could be wrong however. I
guess I need to plan for some kind of delay. Anyone got any ideas? Any
help is always appreciated.

Larry Olson


-----Original Message-----
From: Jon Elson [mailto:elson@...]
Sent: Sunday, March 26, 2006 4:40 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Spindle Start Delay - Do I need to build
one in???

oldpayphones wrote:

>Hello,
>I am still trying to figure out the control systems for my new(old)
>Bridgeport Series 2 control retrofit and I was wondering if i need to
>build in some kind of time delay for the spindle. The reason I ask is
>that the 4J head has an air actuated brake and I was wondering if I
>need to release the brake and give it time (a second or so) to release
>before I start the spindle. I can put in a time delay ice cube if this
>is necessary. Since the machine was DOA I am not sure how the original
>controls were set up. Any help and guidance on this would be much
>appreciated.
>
>

EMC has all this built into the bridgeportio module. The delay times
are defined
in the .ini file. If you are using Machx, I think it provides the same
functionality.

Jon


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