RE: [CAD_CAM_EDM_DRO] Hp 7475 Plotter Servo's

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Victor A. Estes
> Sent: Thursday, September 29, 2005 1:49 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Hp 7475 Plotter Servo's
>
> Alan,
>
> Yea the pin I used was dried up as well. I pulled the tip out with a
> pair of pliers, then I used a small rod to push up through the hole to pop
> the end cap off. I then pulled out the felt core and through away. That
> left me with a very nice plastic housing that I could use as the holder.
> I
> turned a piece of aluminum to fit inside the plastic housing and turned
> the
> aluminum housing to fit the bearing that I had ordered from McMaster Carr.
> I then bored out a small recess for the magnet, superglued the mag in
> place,
> and pressed in the bearing. On the other end I had drilled all the way
> through, so I could knock the mag and bearing out if I needed to. I also
> tapped the hole for a 4-40 thread so that I could secure the aluminum
> holder
> into the plastic housing. On the plastic housing, I cut off the tapered
> end, and made that the top. The end where the plastic cap was fitted now
> became the bottom, and the aluminum holder slides in from this end. The
> 4-40 screw screws in from the other end and keeps everything sandwiched
> together. The I inserted the blade into the bearing hole and viola. It
> works. The holder still fits in the pin holder on the carriage, just
> upside
> down from the original. The knife blade pivots on the magnet and bearing
> with no friction at all. Pics to follow next week.
>
> Victor
> ----- Original Message -----
> From: "Alan Marconett" <KM6VV@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, September 29, 2005 12:09 PM
> Subject: RE: [CAD_CAM_EDM_DRO] Hp 7475 Plotter Servo's
>
>