Re: Anyone have any spare ProFiles or working internal disks for a ProFile?

I've not investigated this, but I wonder if you could transfer the stepper motor from the Lisa mechanism onto a standard PC mechanism?

James,

I've been looking for a dud ST-506 to do some testing on regarding oiling the spindle bearings. Would you be interested in parting with your failed HDA? -J

On Sat, Apr 2, 2016 at 9:45 AM, snhirsch <snhirsch_at_email.domain.hidden> wrote:

>
>
> On Wednesday, March 30, 2016 at 8:19:03 AM UTC-4, James Longinotti wrote:
>>
>> I have a Lisa that has come into a bad situation. I was low-level
>> formatting the profile disk, and about an hour into the format, there was a
>> loud pop and screech. one of the drive heads popped off the disk and
>> destroyed the platters- I’m still in shock.
>>
>> The X/Profile is a bit out of my price range right now and I'm just
>> trying to figure something out.
>> I'm hoping someone here upgraded to an X but still had a working ST-506
>> around.
>>
>
> Hi, James.
>
> Unfortunately the Profile does not use a conventional ST-506 mechanism.
> Patrick Schaefer is the expert on this, but if I recall the details
> correctly the Profile has a stepper with 2x the resolution of a true
> ST-506. In other words, it issues two pulses for each track increment. I
> have had limited success with ST-412 mechanisms as a replacement but
> hesitate to recommend this solution. It is theoretically possible to hack
> the Profile firmware to issue only a single step pulse on track change but
> I do not know if anyone has done this.
>
> If you aren't in a position to spring for an X-Profile you may want to
> consider building one of Patrick's IDE File units. I have one that I share
> between a Lisa 2/5 and an Apple ///+ and can highly recommend the unit.
>
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-- 
Jason Perkins
313 355 0085

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