Re: [CAD_CAM_EDM_DRO] Re: Spindle alternative from noise view

Jon;

I always wondered about this mounting scheme. Is the quill
guide tight enough to prevent any rotation of the quill. The only
thing preventing the quill from rotating is the quill scale and
automatic trip mechanism mounted on the front of the head.
There is no adjustment for wear. Even .001' of slop would give
about .003' Y axis movement. Is that good enough?

Pete.

----- Original Message -----
From: Jon Elson
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Sunday, September 20, 2009 12:37 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Spindle alternative from noise view


Danny Miller wrote:
> Got no idea how I'd even mount it though. That spindle is just round
> all the way around, with no place to bolt to. I guess a mount would
> need to be milled that clamps it all the way around, but the clamping
> force may cause the head angle to vary from completely true with the
> axes. Being smooth and round, I fear that spinning inside the mount
> under high torque loads might actually be a possible problem.
>
I made a bracket to mount a Westwind air bearing spindle to my
Bridgeport's quill.
It worked VERY well. I have pictures here :
http://jelinux.pico-systems.com/wwspndl.html
I made two identical plates and bolted them together with a spacer. It
has two
large holes that were cut by orbiting on my CNC machine, and then bored
with a
boring head for most accurate diameter and circularity. Slots were cut
with a bandsaw
so that clamp bolts could squeeze the bracket to hold the quill and
spindle motor.

If you build it like this, I think spinning the motor housing would be
totally impossible.
Remember that one Hp at 24,000 RPM is a lot less torque than it would be
at 500 RPM.

Jon




[Non-text portions of this message have been removed]