Re: Diablo 31 air filters / plugs ?

[Christian Corti via cctalk]

On Sun, 8 Oct 2017, Tony Duell wrote:
The Diablo positioner is strange. For one thing it is a permanent magnet 
motor and rack-and-pinion mechanism (!). But the important thing here is 
that the heads are loaded to the platter by a solenoid. Not by loading 
ramps like in an RK05. So even if the heads move out from the home 
position they will not touch (and will not touch a disk if one is in the 
drive).


Interesting... exactly as in the IBM 2310.

Christian

Re: Diablo 31 air filters / plugs ?

[Tony Duell via cctalk]

On Sat, Oct 7, 2017 at 9:31 PM, Jerry Weiss via cctalk
 wrote:
>
>> On Oct 7, 2017, at 12:55 PM, jos via cctalk  wrote:
>>
>>
>> Looks like another computer will be joining the stable shortly, containing a 
>> Diablo 31 drive.
>>
>> From the manual it looks that it does not need heads to be locked down for 
>> transport, so I should be save there.
>>
>> But since i will need to fabricate cables : are connector plugs still 
>> obtainable ?
>> And what are people using for air filters these days ?
>>
>>
>>
>> Jos
>>
>
>
> There wasn’t a head lock. The head loading mechanism are designed to retract 
> them
> from the surface when the power is removed.

True, because there doesn't need to be one.

The Diablo positioner is strange. For one thing it is a permanent
magnet motor and
rack-and-pinion mechanism (!). But the important thing here is that
the heads are
loaded to the platter by a solenoid. Not by loading ramps like in an
RK05. So even
if the heads move out from the home position they will not touch (and will not
touch a disk if one is in the drive).

-tony

Re: Diablo 31 air filters / plugs ?

[Jerry Weiss via cctalk]

> On Oct 7, 2017, at 5:00 PM, Al Kossow via cctalk  
> wrote:
> 
> On 10/7/17 1:31 PM, Jerry Weiss via cctalk wrote:
> 
>> There wasn’t a head lock.
> yes, there is.
> 
> It is a 'L' shaped bracket that screws onto the top of the actuator.
> Details in the manual
> 
> You can tie-wrap the actuator or tape the disk with the cylinder numbers
> on it to keep it from moving without it, though
> the heads won't come together without tripping the pawl for the dash pot
> which is extremely unlikely to happen
> 


Sorry - I did a quick check of few manuals and parts breakdowns to see if
my memory was correct prior to posting, but I missed It.   
Ours were hand-me-downs and we probably didn’t get this bit on ours.

These were nice units, and unlike the DEC RK05 series
you didn’t have any nicads, belts or positioner light bulbs to go bad.

Jerry 

Re: Diablo 31 air filters / plugs ?

[Al Kossow via cctalk]

On 10/7/17 1:31 PM, Jerry Weiss via cctalk wrote:

> There wasn’t a head lock.
yes, there is.

It is a 'L' shaped bracket that screws onto the top of the actuator.
Details in the manual

You can tie-wrap the actuator or tape the disk with the cylinder numbers
on it to keep it from moving without it, though
the heads won't come together without tripping the pawl for the dash pot
which is extremely unlikely to happen

Re: Diablo 31 air filters / plugs ?

[Jerry Weiss via cctalk]

> On Oct 7, 2017, at 12:55 PM, jos via cctalk  wrote:
> 
> 
> Looks like another computer will be joining the stable shortly, containing a 
> Diablo 31 drive.
> 
> From the manual it looks that it does not need heads to be locked down for 
> transport, so I should be save there.
> 
> But since i will need to fabricate cables : are connector plugs still 
> obtainable ?
> And what are people using for air filters these days ?
> 
> 
> 
> Jos
> 


There wasn’t a head lock. The head loading mechanism are designed to retract 
them from the surface when the power is removed.

I shipped these cross country many times (back in the day), and out of an 
abundance of caution I recall manually securing the head positioner so it 
didn’t move in and out.  


Jerry 

Diablo 31 air filters / plugs ?

[jos via cctalk]

Looks like another computer will be joining the stable shortly, containing a 
Diablo 31 drive.

From the manual it looks that it does not need heads to be locked down for 
transport, so I should be save there.

But since i will need to fabricate cables : are connector plugs still 
obtainable ?
And what are people using for air filters these days ?



Jos