Re: [CAD_CAM_EDM_DRO] Linear rail & ball screw size suggestions

I personally have not been impressed with the Roto-Zip tool for any CNC application. I never bought one but the boss did at work. He picked up the variable speed model. It wasn't a week (and with
really no useage) that someone twisted the collet lock out of the thing. It sat around until I yanked it apart and found that short of some plastic, nothing keeps this thing from breaking. The good
thing is once the built in lock is removed, you can shove any pin in thru a hole to manually lock the shaft from turning.

The bearings are probably as good as any, but the structure around it would not be much for any CNC application.

The variable speed part annoyingly ALWAYS starts on high and you have to bring it back down.

It's overall quality likely makes it a fabulous candidate for zipping holes in drywall and some "craft" work.... its original purpose. This one just sits in the box as no one uses it for anything
anymore.

CL

Mark Taft wrote:

> Talking about the Rota-zip,
> How good are its bearings, being a diy tool I wonder if it is up tot eh job,
> or has it a good set of bearings ?
>
> Regards
>
> Mark
>
> -----Original Message-----
> From: J.Critchfield [mailto:js3mc@...]
> Sent: 10 April 2002 02:36
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Linear rail & ball screw size suggestions
>
> I'm looking for some help on sizing the linear rails for a small gantry
> router. I have the Data-Cut plans and I will emulate much of what is there
> but I need to size the rails and ball screws before I can continue. The
> usable table area will be 12" x 18" and will be used to route up to 4mm
> graphite plate and G10. I have not chosen a router yet but I am looking at
> the Roto-Zip or similar cut-out tool with 1/8" collets. My tolerence
> requirement is +- .001" or better.
>
> Thanks,
>
> Jay
>
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