ZX Printer Belt

Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
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zx81jens
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Re: ZX Printer Belt

Post by zx81jens » Mon Apr 02, 2018 4:35 pm

I count 48 teeth. And between the two Contacts I count 23 free teeth!!

Greetings
Jens
eyerything will be okay in the end.
if it´s not okay, it´s not the end.

and: uıɐbɐ ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ɹǝʌǝ ɹǝʌǝu ןןıʍ ı

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mhudson52
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Re: ZX Printer Belt

Post by mhudson52 » Mon Apr 02, 2018 5:22 pm

So if the mounting points for the styli are considered as being teeth in addition to the other 46, that will indeed give us 48 all total. It was difficult to determine that from the drawing in the Service Manual.

I will do a re-draw of the CAD file to reflect that.

Thanks for the info, Jens!

Mike
TS 1000 bought in 1982 and brought back to life by Sir Ian

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mhudson52
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Re: ZX Printer Belt

Post by mhudson52 » Tue Apr 03, 2018 4:25 pm

Here is the first print of the ZXprinter belt using Ninjaflex Cheetah 1.75mm filament. I don't have a printer to test fit it on, so if someone Stateside would like to give it shot, let me know. Shipping to the UK costs a little over $14 USD.

It's hard to photograph something black and shiny, but here goes:
100_5547.JPG
100_5545.JPG
TS 1000 bought in 1982 and brought back to life by Sir Ian

McKlaud
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Re: ZX Printer Belt

Post by McKlaud » Tue Apr 03, 2018 4:59 pm

Looks good! Unfortunately I live on "the wrong" side of the pond. :geek:
Claudius
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mrtinb
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Re: ZX Printer Belt

Post by mrtinb » Tue Apr 03, 2018 5:35 pm

It won’t help much without a place to mount the styluses. :cry:
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

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Andy Rea
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Re: ZX Printer Belt

Post by Andy Rea » Tue Apr 03, 2018 5:41 pm

Could the stylus be " melted " into place ?

I know nothing about these materials used

Andy
6 x ZX81, 1 x TS1500 , 1 x +3e, 1 x timex 2040 printer, 1 x timex 2020 cassette deck, siclair printer and some spectrum

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mhudson52
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Re: ZX Printer Belt

Post by mhudson52 » Tue Apr 03, 2018 6:18 pm

After further searching on the interwebs I did come across a couple of fairly decent photos of how the styli are attached. Since the material does allow for some stretching, only minor modifications to my current drawing will be will required and dimensional accuracy will not be critical.

I had considered purchasing a printer off Ebay to help with the design issues, but since I plan to practically give these things away (a couple of bucks to pay for filament) that would not be cost effective.
Attachments
stylus_detail.jpg
TS 1000 bought in 1982 and brought back to life by Sir Ian

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mhudson52
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Re: ZX Printer Belt

Post by mhudson52 » Tue Apr 03, 2018 8:25 pm

Alrighty, here is a screen cap of the latest iteration of the printer belt with mounting points for the styli.

All I need now is a volunteer to give it a test. :shock:
Attachments
Printer belt 48 Styli.JPG
TS 1000 bought in 1982 and brought back to life by Sir Ian

RWAP
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Re: ZX Printer Belt

Post by RWAP » Tue Apr 03, 2018 9:16 pm

The mounting points actually stand proud of the rest of the belt from memory - I don't have a ZX Printer (nor a belt) to try...

Moggy
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Re: ZX Printer Belt

Post by Moggy » Tue Apr 03, 2018 10:05 pm

A section of belt showing the mounting post and a picture of the stylus and the hollow rubber tube that holds it to the post if this helps in any way.

I took them at a fair resolution to allow adequate zooming in.
Attachments
SANY0074.JPG
SANY0073.JPG

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