12 Dec
2021
12 Dec
'21
11:08 a.m.
I just unpacked the rack with my TU56 DECtape drive and discovered that
the movers managed to break the takeup reels. This, despite many layers
of foam padding, stretch film, and warning signs. On the other hand,
this was the only item that suffered any damage at all. Not too bad for
three moving van loads!
Can anyone help me with an empty DECtape reel or two?
Thanks,
Alan Frisbie
17 Dec
17 Dec
6:01 a.m.
On 12/12/2021 1:08 PM, Alan Frisbie via cctalk wrote:
I just unpacked the rack with my TU56 DECtape drive
and discovered that
the movers managed to break the takeup reels.? This, despite many layers
of foam padding, stretch film, and warning signs.? On the other hand,
this was the only item that suffered any damage at all.? Not too bad for
three moving van loads!
Can anyone help me with an empty DECtape reel or two?
Thanks,
Alan Frisbie
Were they left on the drive during shipping?
Anyway, I can probably find one lying around that I could spare. (Or,
if you have a bunch of tapes, maybe sacrifice a scratch?)
Location?
JRJ
6:44 a.m.
I am also in need of emtpy reels.? I purchased a TU56 that had been
taken apart to restore and the restoration had never been finished. The
empty reels were not in the box of parts.
Has anyone tried 3D printing these?
On 12/17/2021 8:01 AM, Jay Jaeger via cctalk wrote:
On 12/12/2021 1:08 PM, Alan Frisbie via cctalk wrote:
I just unpacked the rack with my TU56 DECtape
drive and discovered that
the movers managed to break the takeup reels.? This, despite many layers
of foam padding, stretch film, and warning signs.? On the other hand,
this was the only item that suffered any damage at all.? Not too bad for
three moving van loads!
Can anyone help me with an empty DECtape reel or two?
Thanks,
Alan Frisbie
Were they left on the drive during shipping?
Anyway, I can probably find one lying around that I could spare. (Or,
if you have a bunch of tapes, maybe sacrifice a scratch?)
Location?
JRJ 
7:13 a.m.
On Dec 17, 2021, at 9:44 AM, Mike Katz via cctalk
<cctalk at classiccmp.org> wrote:
I am also in need of emtpy reels. I purchased a TU56 that had been taken apart to
restore and the restoration had never been finished. The empty reels were not in the box
of parts.
Has anyone tried 3D printing these?
Interesting idea. A while ago someone posted a picture of what looks like a
"go/no-go" gauge for DECtape reels. It is marked with the dimensions of the two
sides: 2.504-2.505 inches for the "no-go" end, 2.494-2.495 for the
"go" end. So that tells us the hole diameter is 2.500 +/- .004. Can 3D
printing deliver that sort of tolerance (with hobbyist-price machines)?
paul
8:23 a.m.
On Fri, Dec 17, 2021 at 10:13 AM Paul Koning via cctalk
<cctalk at classiccmp.org> wrote:
What you can do is print with extra shells (2 layers is one default,
depending on your slicer), then print using ABS, which will shrink
1-2% (so you often print at 100.1% and caliper for
dimensionally-critical items) _then_ since it's ABS, you can
vapor-smooth with acetone and remove ridges and improve top layer
bonding, *then* turn on a lathe to spec - but trying to remove less
than half a filament diameter.
I think that technique would work. I wouldn't just print and go
unless I at least smoothed the tape path to prevent adding wrinkles.
-ethan
Has anyone
tried 3D printing these?
Interesting idea. A while ago someone posted a picture of what looks like a
"go/no-go" gauge for DECtape reels. It is marked with the dimensions of the two
sides: 2.504-2.505 inches for the "no-go" end, 2.494-2.495 for the
"go" end. So that tells us the hole diameter is 2.500 +/- .004. Can 3D
printing deliver that sort of tolerance (with hobbyist-price machines)? 
21 Dec
21 Dec
1:08 a.m.
On Fri, 17 Dec 2021, Paul Koning wrote:
Interesting idea. A while ago someone posted a
picture of what looks
like a "go/no-go" gauge for DECtape reels. It is marked with the
dimensions of the two sides: 2.504-2.505 inches for the "no-go" end,
2.494-2.495 for the "go" end. So that tells us the hole diameter is
2.500 +/- .004. Can 3D printing deliver that sort of tolerance (with
hobbyist-price machines)?
That's huge four milli-inches, that's about 100?m. Hobbyist machines
usually have a Z (layer) resolution of at least 100?m and a position
accuracy of about 20?m. The specifications of my Adventurer 3 say 50-400?m
Z resolution, 11?m X/Y accuracy and 2.5?m Z accuracy.
For a spool it's the X/Y accuracy that matters (and the material of
course).
Christian
17 Dec
17 Dec
8:39 a.m.
One of my future projects is building a 60% scaled TU56 to go with the PiDP11/70 ...
This might be of interest on Thingiverse: https://www.thingiverse.com/thing:4635976
Henk, PA8PDP
Van: Mike Katz via cctalk<mailto:cctalk at classiccmp.org>
Verzonden: vrijdag 17 december 2021 15:44
Aan: Jay Jaeger<mailto:cube1 at charter.net>; General Discussion: On-Topic and
Off-Topic Posts<mailto:cctalk at classiccmp.org>
Onderwerp: Re: TU56 DECtape takeup reel needed
I am also in need of emtpy reels. I purchased a TU56 that had been
taken apart to restore and the restoration had never been finished. The
empty reels were not in the box of parts.
Has anyone tried 3D printing these?
On 12/17/2021 8:01 AM, Jay Jaeger via cctalk wrote:
On 12/12/2021 1:08 PM, Alan Frisbie via cctalk wrote:
I just unpacked the rack with my TU56 DECtape
drive and discovered that
the movers managed to break the takeup reels. This, despite many layers
of foam padding, stretch film, and warning signs. On the other hand,
this was the only item that suffered any damage at all. Not too bad for
three moving van loads!
Can anyone help me with an empty DECtape reel or two?
Thanks,
Alan Frisbie
Were they left on the drive during shipping?
Anyway, I can probably find one lying around that I could spare. (Or,
if you have a bunch of tapes, maybe sacrifice a scratch?)
Location?
JRJ 
6:21 p.m.
Mike said
I am also in need of emtpy reels.? I purchased a TU56
that had been
taken apart to restore and the restoration had never been finished. The
empty reels were not in the box of parts.
Has anyone tried 3D printing these?
I haven't tried printing a TU56 one as I don't have that peripheral, but have
done
in OpenSCAD a paper tape spool where the sides twist-lock together.
If I had one, or measurements, I'd script it up.
Steve.
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days inactive
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bitwiz＠12bitsbest.com -
cc＠informatik.uni-stuttgart.de -
cube1＠charter.net -
ethan.dicks＠gmail.com -
Flash688＠flying-disk.com -
henk.gooijen＠hotmail.com -
paulkoning＠comcast.net -
steven＠malikoff.com