I made an amazing find at the Electronics Flea Market yesterday!

/cc @paulrickards (since I know you'll appreciate this!)

#plotter #computerart #hp7475a

Anyone know where I can get the rubber boots for the pen carosel in an HP7475a plotter? I have a couple that have dry rotted and can't find a source. (https://partstore.encompass.com/item/3220797/HP/07475-60038/)

#plotter #generativeart #plotterart #hewlettpackard #hp7475 #hp7475a #pleaseHelp #iveGoogledAllICanGoogle

Here is another picture of the whole set #HP9816, #HP7475A, hidden an #HP9122 and an #HP9134, the Bruël & Kjær 2034 and the #HP4277A LCZ meter.
The first plot of the #HP7475A after the #repair went very smoothly. Here is controlled by the #HP9816, plotting the impedance vs. frequency of a 4µF 400V polypropylene #capacitor (that shows a nice resonance at 300 kHz). https://www.youtube.com/watch?v=UvrfeoOsdLM
HP7475A plotter (without cover) controlled by an HP9816 workstation

YouTube
The 3D printed wheel seems to work perfectly! Source: https://www.thingiverse.com/thing:4696713 #HP7475A
Geneva Drive Wheel mechanism for an HP7475A 6-pen plotter. by 3Dmechbot

This 3D printed part is a Geneva Drive Wheel for the 6-Pen Carousel on an HP7475A plotter. This 3D printed part fits onto the D-shaped shaft of the stepper motor that spins the 6-Pen Carousel on the HP7475A plotter. This part was designed using the Freeware Version of the EMachineshop CAD software program. The Emachineshop design file has also been included in case you want to modify it.

Meh! This piece has become brittle and self destructed at the first attempt! I’ll try to 3D print a new one as apparently it’s a common issue. #HP7475A
I think it is a good occasion to test the #HP7475A plotter 🙂 I still have to clean it.

For all HP fans, a beautiful HP 9872C plotter from my collection in 4K as it draws the Columbia space shuttle.

Enjoy the sound 😍

Click here for the video: https://youtu.be/msqYxFaRwng

#hp9872c #hpplotter #plotter #hp85 #hp85b #hp9000 #hpbasic #hpux #hp7475a #hp7470a

HP 9872C Plotter drawing a Columbia space shuttle

YouTube
Habe ein neues Spielzeug in der Rettung 😬 den habe ich in einer alten Scheune mit 2cm Dreck drauf gefunden ... Ein wunderschöner HP 7475a Plotter. Das gute Stück wurde über die Firma CTM vertrieben und hatte deshalb noch ein paar verwaschene Kennzeichnungsschilder drauf. Nach der ersten Reinigung wurde getestet. Das gute Stück hat die Wohnung erstmal in einen Schleier voll Rauch gehüllt 😅 Elkos und ein TTL-Baustein. Aaaaaaaaber jetzt schnurrt er wieder! Bald wird geplottet! #hp #hp7475a #plotter

Finally finished my #HP7475A #Plotter

Got it quite dirty and in unknown condition - was lying around in the attic for > 20 years.

Cleaned, replaced leaking caps - and it works 😎

They were built in the early 1980s - and are known to be pretty indestructible

#retrocomputing #penplotter