[GreenKeys] [External] Re: empty papertape reels (for 8-bit tapes)

[Dave Wade]

Henk,

Other options would be to laser cut the sides in thin plywood and just 3d
print the hub. In the UK lots of HackSpaces have these..

Dave

 

From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
On Behalf Of Henk Gooijen
Sent: 05 August 2020 12:58
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] [External] Re: empty papertape reels (for 8-bit
tapes)

 

 

Thanks for all the great responses.

 

I have at least 10 rolls of 1 inch papertape, so no need for more paper, hi.

I am only looking for a few empty reels (spools?), plastic or metal.

I do not need a reader or punch. I have two PC05, a Facit 4000 punch (IIRC),

and two readers, one from Remex, the other from Ghielmetti.

 

Buying another reader just for the two reels ... I might be tempted, but

the shipping costs are holding me back. Reaching out to sellers whether they

sell empty reels is a good idea, definately worth a try.

 

3D printing is also an option. I did a design in Front Panel Express, then

it is made in aluminum. Looks fantastic, but the price is accordingly :(

But making the flanges in aluminium and the hub (center parts) of some thick

plastic tubing (to hold screws for the flanges) is an idea to investigate.

 

Just in time (for this reply) I saw Doug's email in my spam folder. Not

every email from greenkeys goes into my Inbox, some go to the spam folder,

but that will be a matter of time. Your reels look as real as it gets Doug!

If somebody has a 3D printer and the skills (I have neither), I am very

interested in a few, and I guess from the response that more guys could use

a couple of them.

 

I will ask a guy at work (when we go back to work, now working at home!)

if he can make a few but scaled. I am working (actually thinking) about

a papertape reader with the front panel dimensions fitting to Oscar's

PiDP-11/70. Of course, the reader head and tape remain 1 inch :)

I did some work on a webpage to describe this project ...

 

Thanks!

Henk

 

 

Van: john at toebes.com <mailto:john at toebes.com> 
Verzonden: woensdag 5 augustus 2020 05:48
Aan: 'Jones, Douglas W' <mailto:douglas-w-jones at uiowa.edu> ; 'Dave Wade'
<mailto:dave.g4ugm at gmail.com> ; 'Henk Gooijen'
<mailto:henk.gooijen at hotmail.com> ; GreenKeys at mailman.qth.net
<mailto:GreenKeys at mailman.qth.net> 
Onderwerp: RE: [GreenKeys] [External] Re: empty papertape reels (for 8-bit
tapes)

 

Doug,
  Those are some excellent pictures.  I made a quick model in Onshape based
on the measurements I was interpreting.  If there is any chance someone
could verify my measurements, it would be appreciated.  In particular, I'm
not 100% sure of the thickness of the outside of the reels.   If we get the
model tweaked, it is really easy to export a STL or STP file for people to
3D print.

https://cad.onshape.com/documents/debbba2925a167ad85461476/w/ce2487daaffd99c
0fbdff960/e/27715fe3df49726eee4106f7

-- John Toebes]
john at toebes.com <mailto:john at toebes.com>  

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
<mailto:greenkeys-bounces at mailman.qth.net>
<greenkeys-bounces at mailman.qth.net
<mailto:greenkeys-bounces at mailman.qth.net> >
On Behalf Of Jones, Douglas W
Sent: Tuesday, August 4, 2020 5:53 PM
To: Dave Wade <dave.g4ugm at gmail.com <mailto:dave.g4ugm at gmail.com> >; 'Henk
Gooijen'
<henk.gooijen at hotmail.com <mailto:henk.gooijen at hotmail.com> >;
GreenKeys at mailman.qth.net <mailto:GreenKeys at mailman.qth.net> 
Subject: Re: [GreenKeys] [External] Re: empty papertape reels (for 8-bit
tapes)

From: Dave Wade [dave.g4ugm at gmail.com] -- Tuesday, August 4, 2020 3:57 PM
> Probably need to print them in three pieces, so 2 flanges and a hub.

The reels I just sent to John at tubetestingpros.com
<mailto:John at tubetestingpros.com>  a few weeks back were
two-piece reels.  I just found I have two more in my pile.  I've attached
photos (including metric and English rulers in the view).  These aren't
fashion photos, but they should suffice as good starting points if someone
wants to 3d print some reels.  Notice the fairly large round central hole.
This is intended for a light friction fit on the tape winder shaft, so that
the shaft can spin continuously at a speed faster than the reel, with
friction determining the tension on the tape.  The friction was determined
by a knurled screw on the end of the shaft that drives a taper into the end
of the shaft, causing it to flare out.

One half reel has dimples on the end of its three legs that fit sprung bumps
on the other to lock the rotation.  The other half reel has notched ends on
its legs that fit holes on the other half.  Press the legs into the holes
and then twist to lock the two halves together.  It clicks locked, and
unlocks with a click when you twist the other way.

Someone should really make plans for 3D printing something like these, since
they do get lost and break.  I guess they are PVC, and I suspect simple
breaks can be repaired with a solvent-based cement, just like you can glue
Teletype model 33 cases with solvent cement.

         Doug Jones
         jones at cs.uiowa.edu <mailto:jones at cs.uiowa.edu> 

 

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