On 06/18/2015 01:02 PM, tony duell wrote:
I also seem to remember that this pack is used with a special alignement
meter, not a 'scope. And that there are special tools for moving the heads
I found a sort-of user manual for this on bitsavers, but no schematics of the
meter, so no easy way to re
>
> What is the difference between an RK06 and 07 ?
>
> Is it capacity?
Yes, in particular number of cylinders. Both have 3 heads and IIRC same number
of sectors.
The RK07 has narrower heads than the RK06. AFAIK the RK07 will not even read
an RK06 pack (I am not sure the servo will manage to l
On Thu, Jun 18, 2015 at 11:39:19AM +0200, Johnny Billquist wrote:
> On 2015-06-18 08:16, Pontus Pihlgren wrote:
> >I ask because we have an RK07 at the Update Computer Club.
>
> I didn't know. When did we get one, and from where? We had one many
> years ago that I dumped. We might still have the p
On 2015-06-18 08:16, Pontus Pihlgren wrote:
What is the difference between an RK06 and 07 ?
Is it capacity?
Yes. The RK07 is double the capacity.
Could this pack be used to align an RK07 ?
I don't think so. The RK06 and RK07 used the same design for the packs,
but the RK07 packs twice the
On Thu, Jun 18, 2015 at 08:16:07AM +0200, Pontus Pihlgren wrote:
>What is the difference between an RK06 and 07 ?
>
>Is it capacity?
Yep. 800-something cyls (~27 MB) instead of 400-something (~14 MB).
>Could this pack be used to align an RK07 ?
I wouldn't think so. They aren't media-compatible
What is the difference between an RK06 and 07 ?
Is it capacity?
Could this pack be used to align an RK07 ?
I ask because we have an RK07 at the Update Computer Club.
/P
On Wed, Jun 17, 2015 at 08:53:22PM +0100, Jarratt RMA wrote:
> I don't have an RK06 and I am not expecting to get one any tim
On 06/17/2015 11:56 AM, Johnny Billquist wrote:
On 2015-06-17 18:36, Pontus Pihlgren wrote:
How was alignment packs produced?
As far as I know, in special machines mounted on slabs on stone
weighting tons, standing on dampeners, so that you had absolutely
vibration free environment, and the
Microdata had a setup they used for packs, then later for writing servo
platters for their Reflex winchester drives.
Similar to this system someone made a video of on youtube
https://youtu.be/p4v7RRadC8E
The electronics, optics, lasers and control heads show up on ebay from
time to time. The
I don't have an RK06 and I am not expecting to get one any time soon, but I
don't mind putting in an offer just to be sure it gets saved, but I
wouldn't pay the full asking price. Does anyone intend to buy it or make an
offer? If so then I won't.
Regards
Rob
On 17 June 2015 at 16:39, Noel Chiapp
> On Jun 17, 2015, at 1:50 PM, Johnny Billquist wrote:
>
> On 2015-06-17 19:40, tony duell wrote:
>> [Writing alignment disks]
>>> As far as I know, in special machines mounted on slabs on stone
>>> weighting tons, standing on dampeners, so that you had absolutely
>>> vibration free environment,
[Writing alignment disks]
> > I have an idea that some of these units used an optical interferometer to
> > determine the head position
>
> Quite possible. But it also requires the movement control being
> different from a standard drive, in order to drive at the precision, as
> well as the feedb
On 2015-06-17 19:40, tony duell wrote:
[Writing alignment disks]
As far as I know, in special machines mounted on slabs on stone
weighting tons, standing on dampeners, so that you had absolutely
vibration free environment, and then a very precisely controlled head
control system that could write
[Writing alignment disks]
> As far as I know, in special machines mounted on slabs on stone
> weighting tons, standing on dampeners, so that you had absolutely
> vibration free environment, and then a very precisely controlled head
> control system that could write the tracks at the exact place the
> From: Pontus Pihlgren
> How was alignment packs produced?
On a special rig, I'm pretty sure. I don't know how the RK06 alignment pack
works, but I am familiar with the RK05 (our machine had them, and we had to
realign one after a head crash), and I assume it's probably similar; it had t
On 2015-06-17 18:36, Pontus Pihlgren wrote:
How was alignment packs produced?
As far as I know, in special machines mounted on slabs on stone
weighting tons, standing on dampeners, so that you had absolutely
vibration free environment, and then a very precisely controlled head
control system
How was alignment packs produced?
/P
On Wed, Jun 17, 2015 at 11:39:25AM -0400, Noel Chiappa wrote:
> Anyone need an RK06 alignment pack:
>
> http://www.ebay.com/itm/Digital-Equipment-RK06-Aglinment-pack-/221803433215
>
> Seems like something that should definitely get saved!
>
> Noel
On Wed, Jun 17, 2015 at 11:39:25AM -0400, Noel Chiappa wrote:
>Anyone need an RK06 alignment pack:
>
> http://www.ebay.com/itm/Digital-Equipment-RK06-Aglinment-pack-/221803433215
>
>Seems like something that should definitely get saved!
That's AMAZING! I never had RK06es (just RK07s -- DM has th
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