Re: Re: Ball screws

I have recommended the hiwin ball screws to a friend in San Diego. He
installed them on a enco mill. He loves them and says they are very
accurate.
Dan
-----Original Message-----
From: Matt Shaver <mshaver@...>
To: CAD_CAM_EDM_DRO@onelist.com <CAD_CAM_EDM_DRO@onelist.com>
Date: Thursday, November 11, 1999 11:49 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Ball screws

>From: "Matt Shaver" <mshaver@...>
>
>> From: Jon Elson <jmelson@...>
>>
>> > Thanks Bob,
>> >
>> > I'll give Rockford a call. If they have my size, this will fill the
>bill.
>> >
>> > Tom
>> >
>> > >Rockford Ball Screw Co. sells a preloaded ballscrew setup for the
>> > >Bridgeport
>> > >for $650. The screws are rolled - .003" per inch lead accuracy. Just
>remove
>>
>> I should point out that if this is cumulative, .003" / INCH is .036"/

Foot,

>if you
>> have 2 feet of travel, this is an error of .072", which is astoundingly
>bad.
>> My massively worn 1941 Bridgeport with the original screws was better

than

>> this, even if you were reading off the wrong side of the backlash!
>
>I sure hope they mean .003"/FOOT! If you want to see an inexpensive
>(relatively) ground set that is spec'd at less than .0005"/ft lead error

see:

>
>http://www.hiwin.com/ballscrew/bridge.html
>
>Matt
>
>>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems in the above catagories.

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>bill,
>List Manager
>