Re: Diablo 31 air filters / plugs ?
On Sat, Oct 7, 2017 at 11:13 PM, Jerry Weiss via cctalk wrote: > These were nice units, and unlike the DEC RK05 series > you didn’t have any nicads, belts or positioner light bulbs to go bad. I replaced a lot of nicads and positioner bulbs in RK05s in the 80s... -ethan
Re: Diablo 31 air filters / plugs ?
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 ?
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 ?
> 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 ?
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 ?
> 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 ?
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