Re: [CAD_CAM_EDM_DRO] Stepper Motor steps and other questions

I have two such DRT's, they have "integrators" on them
that are very desirable to maintain, since you can "dial in " your gear
ratio. You can connect your steppers to these, and expand your selection of
motors, and also have a more precise machine.

----- Original Message -----
From: "Russ Revels" <n4ft@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, February 09, 2002 6:39 PM
Subject: Re: [CAD_CAM_EDM_DRO] Stepper Motor steps and other questions


> Hi Alan,
>
> Thanks for the reply. I have been confused with the steppers because the
> only ones I have on hand are geared and say something like 280 pps for 5
5/6
> rpm. The DRT table is actually for a Navy trainer. I was asked because
of
> my interest in cnc to modify the existing tables and get rid of the
gearing
> and stepping motors which are extremely expensive to replace. The table
was
> manufactured in the early 50s and motors have to be specially built about
> $8500 ea and 6 month leadtime. I think I can remove all of the gearing
and
> motors and connect steppers to the ends of the leadscrews and run the
table
> directly from a pc. I will probably have special software for control
since
> it will have to receive movement information via ethernet and then convert
> it into the required x y steps for the table. Actually the "bug" movement
> is pretty small under normal conditions. I will have a scale of 2000
yds/in
> for normal and 200 yds/in for special (manoverboard). I think I will
> contact Dan Mauch after I get home from travel next weekend and see about
> getting the parts to prototype this thing. I only need two axis but will
> buy three so I can use the parts on my router table when I am finished.
>
> Being the resident ham tinkerer gtot me into the task. I am looking
forward
> to it because now I can work on something for me at the sametime I do the
> job.
>
> I work as a contractor for the navy and we do software and hardware
> modifications on navy trainers. This is for a bridge/cic trainer for
junior
> officers.
>
> It is like a hobby job and since I make circuit boards and assemblies I
get
> to play with all the toys.
>
> Thanks for the info Alan. I read the posts several times a day and am
> amazed at some of the things being done in home
> shops.
>
> I am looking forward to getting my setup going.
>
> Russ
>
>
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