Re: [CAD_CAM_EDM_DRO] Z Axis Mechanical Layout Options - Bridgeport M Head

Mark,

You may want to contact Roland Friestad at Cardinal engineering. Roland is
active on this group. cardinal.eng@...

Roland wrote a series of article for Home Shop Machinist back 1991 and 1992
that may cover what you want to do.

I am currently working on an Enco mill using his design.

Bob Campbell

----- Original Message -----
From: "natchamp_87" <mark@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, November 18, 2002 3:31 PM
Subject: [CAD_CAM_EDM_DRO] Z Axis Mechanical Layout Options - Bridgeport M
Head


> Well, I got my new (to me!) BP M head mill. I have already started
> taking it apart for the clean up, ball screws, etc. One of the
> things I have not resolved is the best way to accomodate the Z axis
> travel. I am hoping someone can shed some light on the best way to
> accomplish this.
>
> If I move the quil, it appears there are a couple ways to do this.
> 1) mount a motor to turn the same shaft as the hand lever. This to
> me has a problem of very long travel for a given rotational travel of
> the motor, unless I severly under drive the pulley which still might
> not be enough?
> 2) mount a motor to turn the fine feed shaft and worm gear. This
> would fix the long travel per motor rotaion in 1 but the worm gear
> isn't fixed to the shaft, it works on friction. I could key-way the
> worm gear onto the shaft? This, to me, seems like the best approach
> for moving the quil.
>
> If I move the knee I would need a bigger motor and could still under
> drive to address the higher torque required. However, there doesn't
> appear to be any good mounting locations for this method.
>
> Can anybody shed some light on this? I know people have done this
> many times and would love to hear some insight. Thanks a bunch.
>
> Mark
> mark@...
> www.mark.hargett.com
>
>
>
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