Re: [CAD_CAM_EDM_DRO] Renishaw, digitizers

Hi Alan:
I'm horrified to hear that you want to clean up your Sherline spindle
nose with a Die!!!.
Don't do it if you want to preserve any semblance of concentricity.
I would do one of two options here:
1) Send the headstock back to Sherline for evaluation and replacement if
necessary.
2) Blue the threads on the spindle and recut them in situ with a single
point threading tool.
Use your 3 and 4 jaw chuck threads as your gage.
Cheers

Marcus
-----Original Message-----
From: Alan Marconett KM6VV <KM6VV@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Friday, January 12, 2001 2:52 PM
Subject: Re: [CAD_CAM_EDM_DRO] Renishaw, digitizers

>Jon,
>
>Sure! That sounds like a plan! Do you drill through the ball bearing?
>That must be tricky! a .25" shaft would mount good in a collet on the
>Sherline. Or any other way you think would work good. My .75" x 16
>spindle thread is still giving me problems. I have ordered a tap and
>die set for that size (can't remember the catalog!), never received
>them! I had hoped to clean up the threads a little. They were never
>damaged, but I can't thread on an end mill holder.
>
>I have another similar offer of exchange, and am open to a few more.
>I'm running on a single '386 33mhz machine, so that is one thing I need
>to sort out. Using the 8254 timer should help out on the delay timing
>needed to set the axis speed.
>
>Jon Anderson wrote:
>>
>> Alan,
>>
>> I think it could well be scaled to fit a Sherline. I just grabbed the
>> smallest Heim joint I had laying around and sort of scaled it from
>> there. In fact, I could probably do away with the Heim joint by passing
>> the stylus rod through a steel ball and silver soldering it, and letting
>> that seat in a conical front peice. Keeping in mind that this is only
>> good for probing conductive surfaces, if you would be interested, I'd
>> make up a couple and send you one in exchange for a copy of your program
>> to test when it's ready.
>>
>> Jon
>
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