🚀 go-pugleaf

In article <727656541.150000.WILSON@ULLA.FORNAX.COM>, wilson@ulla.fornax.com (John Wilson) writes...
>Speaking of RM03's (real ones), does anyone know how to align
>one?  I assume I need an alignment pack with magical qualities,
>or at least with a price which suggests that it MUST have
>magical qualities?  OR does anyone have a working one for sale, cheap?

	You also need some kind of exerciser, (mainly to select the head
	you have to align,) an adapter to bring out the test signal, and you
	also need a special tool to adjust the heads.

	Then, (at least in my case,) you do it so infrequently that it takes
	a day or two of diddling to remember just how to do it.

	All in all, a >lot< more expensive than doing it for an RK05.

   Frank R. Borger - Physicist    __       George Halas had two heirs; one
Michael Reese - Univ. of Chicago |___      carried his seed and one carried his
  Center for Radiation Therapy   | |_) _   soul. ... One can imagine the wisper
    "Birthplace of Softball"       | \|_)  of George Halas, rooting for his
Internet:  Frank@rover.uchicago.edu   |_)  soul. - Jeannie Morris
Phone : 312-791-8075 fax : 567-7455        

In article <22JAN199317355431@rover.uchicago.edu>, frank@rover.uchicago.edu (Frank - Hardware Hacker - Borger) writes:
> 	You also need some kind of exerciser, (mainly to select the head
> 	you have to align,) an adapter to bring out the test signal, and you
> 	also need a special tool to adjust the heads.

  It's not that bad. You can substitute a simple program for the exerciser
(see the sample in BASIC-Plus for RSTS/E after my sig), hook the scope up
directly to the read preamps up in the shroud, and use a regular Allen wrench
to loosen/tighten the head bolt. You can wiggle the head back and forth with
the Allen wrench in the head bolt socket.

  I've been able to achieve factory-level tolerances this way in RM05's.

  CAUTION: Be sure to put the head alignment lock pin in the alignment pos-
ition. Crashing an alignment pack is _much_ better than losing a finger in
the drive.

> 	Then, (at least in my case,) you do it so infrequently that it takes
> 	a day or two of diddling to remember just how to do it.

  That's true 8-)

> 	All in all, a >lot< more expensive than doing it for an RK05.

  Ever change a head in an RA60? You just throw 'em in. Each surface has its
own servo. Of course, to reduce head switch time, you can align 'em.

	Terry Kennedy		Operations Manager, Academic Computing
	terry@spcvxa.bitnet	St. Peter's College, Jersey City, NJ USA
	terry@spcvxa.spc.edu	+1 201 915 9381

10	rem align.bas - quick and dirty head alignment program for RM05's.
20	open "dr3:" as file #1%, recordsize 4096% &
	\ field #1%, 4096% as a$
30	input "Head: ",h%
35	input "Cylinder: ",cyl%
40	h=h%*4% &
	\ on error goto 90
50	b=cyl%*76.
60	get #1%, block b+h
70	input "Next?",a$ &
	\ goto 30
90	print err,erl,h%,b+h &
	\ resume 70
32767	end

In article <727656541.150000.WILSON@ULLA.FORNAX.COM>, wilson@ulla.fornax.com (John Wilson) writes:

|> 
|> Speaking of RM03's (real ones), does anyone know how to align
|> one?  I assume I need an alignment pack with magical qualities,
|> or at least with a price which suggests that it MUST have
|> magical qualities?  OR does anyone have a working one for sale, cheap?
|> 

On roughly the same subject, does anybody know if it's still
possible to get hold of the alignment cartridge for an RK05?
I had to re-align the heads on one of my RK05s a couple of years
ago, and ended up using an old DEC software master copy, on the
basis that presumably DEC's heads will be aligned if
anybody's are. It would be nice to be able to do it properly,
though. I thought about getting in touch with DEC, but I suspect
they'd charge an arm and a leg for the alignment cartridge, supposing
they still make it. If anyone has a second-hand one, I'd be very
interested in buying it (within reason!).

|> John Wilson

James
-- 

-------------------------------------------------------
James Lothian        |      "It's life, Jim, 
james@uk.ac.ed.caad  |   but not as we know it"

In article <30757@castle.ed.ac.uk>, jlothian@castle.ed.ac.uk (J Lothian) writes...
>On roughly the same subject, does anybody know if it's still
>possible to get hold of the alignment cartridge for an RK05?
>I had to re-align the heads on one of my RK05s a couple of years
>ago, and ended up using an old DEC software master copy, on the
>basis that presumably DEC's heads will be aligned if
>anybody's are. It would be nice to be able to do it properly,
>though. I thought about getting in touch with DEC, but I suspect
>they'd charge an arm and a leg for the alignment cartridge, supposing
>they still make it. If anyone has a second-hand one, I'd be very
>interested in buying it (within reason!).
>
	DEC still lists the item in the electronic store.

	Part # -RK05K-AC	Price $178	Delivery 1-day

	Considering that regular RK05 PDP11 and PDP8 cartridges are $120
	each, doesn't seem high. Also note that you still can by cartridges
	hard-sectored for the PDP-8.

	Anybody want to call up IBM and ask them about 2315 cartridges
	and alignment disks? Might be an interesting comparison.

   Frank R. Borger - Physicist    __       George Halas had two heirs; one
Michael Reese - Univ. of Chicago |___      carried his seed and one carried his
  Center for Radiation Therapy   | |_) _   soul. ... One can imagine the wisper
    "Birthplace of Softball"       | \|_)  of George Halas, rooting for his
Internet:  Frank@rover.uchicago.edu   |_)  soul. - Jeannie Morris
Phone : 312-791-8075 fax : 567-7455