Repairing a Vendo V-80 cola dispencer of the 1950s

RE: Repairing a Vendo V-80 cola dispencer of the 1950s

Jan Cumps — Fri, 17 Jul 2015 07:35:52 GMT

Epilogue:

The girl left. Expensive gifts don't guarantee good relations.

RE: Repairing a Vendo V-80 cola dispencer of the 1950s

gadget.iom — Mon, 24 Nov 2014 17:37:57 GMT

It's great to see old classics being restored. Good work!

RE: Repairing a Vendo V-80 cola dispencer of the 1950s

Jan Cumps — Mon, 24 Nov 2014 14:56:35 GMT

As a wrap up for my work, a few thoughts on why I went for this particular solution, and a capture of coin detect test and final test with motor and bottles.

I could have taken a number of other approaches. A microcontroller is not needed for this kind of functionality. But I have been working with constraints.

We did not know what was all defect. We knew coin detection did not work, and that the whole machine with bypassed coin detector didn't work either. A µC gave me more flexibility to also solve issues with other detectors and actuators.

Time: It was a present from someone to someone for her birthday. I focused on things that I had lying around. All components are second hand (Arduino, power adapter, relais, protoboard, caps) or recovery (IR opto-coupler, led's, resistors, semiconductors and trimpot).

video: review the coin handler

[View:https://www.youtube.com/watch?v=ny5qxE83iu8:520:333]

I don't know that making a dedicated circuit would have been more economical for a one-off like this. That doesn't mean a lot though if you compare it to the price of the motor revision.

[View:/resized-image/__size/620x451/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/8468.contentimage_5F00_177635.jpg:620:451]

We achieved our main goal. The vending machine is ready in time. We'll be packing it and hide it in the garage. The lucky one will get an envelope with a single coin without explanation, and we'll walk her to the garage with that. She can then buy the first botle.

Us celebrating the working machine:

[View:https://www.youtube.com/watch?v=yh0dN3YKLCs:520:333]

Hooray!

RE: Repairing a Vendo V-80 cola dispencer of the 1950s

Jan Cumps — Thu, 20 Nov 2014 13:59:28 GMT

The machine is back to functional.During the time that the motor was under revision, I've built in the coin detector. Also the re-wiring of the circuit has been reviewed and fixed where needed.

[View:/resized-image/__size/620x827/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/7725.contentimage_5F00_177633.jpg:620:827]

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The motor is now back (the costs to rewind the coils and have the gear box fixed are significant). And we have done successful tests.

In the video below, taken at the time I was reviewing the machine's state, you don't see all of that yet. It's covering the review of what's wrong.

[View:https://www.youtube.com/watch?v=Xhf7OPJOx58:520:333]

RE: Repairing a Vendo V-80 cola dispencer of the 1950s

Jan Cumps — Sun, 16 Nov 2014 18:08:08 GMT

Yeah, there is a whole series of mods that can be hacked into the machine. First I could replace the mechanical switches with sensors (optical or magnetic), the cooling thermostat and motor controls are other candidates for modification.

I can't use the current actuators for low voltage though. The state of the contacts and the amount of bounce is dazzling. It works to activate the 110 V relais, but no chance to get a decent 3.3 or 5V signal.

Some action photos:

measuring the motor circuit:

[View:/resized-image/__size/620x465/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/3036.contentimage_5F00_177625.jpg:620:465]

coin detector

[View:/resized-image/__size/620x451/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/1882.contentimage_5F00_177626.jpg:620:451]

detector proto

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Some hardware:

[View:/resized-image/__size/284x213/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/7343.contentimage_5F00_177628.jpg:284:213][View:/resized-image/__size/210x210/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/2475.contentimage_5F00_177629.jpg:210:210]

[View:/resized-image/__size/365x365/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/8322.contentimage_5F00_177630.jpg:365:365][View:/resized-image/__size/362x362/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/8836.contentimage_5F00_177631.jpg:362:362][View:/resized-image/__size/363x363/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-46c68609-a4e6-4058-8b9a-9cfba29b9754/5773.contentimage_5F00_177632.jpg:363:363]

my proto code

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RE: Repairing a Vendo V-80 cola dispencer of the 1950s

doctorcdf — Sun, 16 Nov 2014 11:10:54 GMT

It's a pity you don't have more time: it would be great to see you upgrade it, perhaps by incorporating new controls, perhaps putting in sensors so you can monitor the internal temperature, and so on...

RE: Repairing a Vendo V-80 cola dispencer of the 1950s

Robert Peter Oakes — Sun, 16 Nov 2014 03:12:01 GMT

I think the primary thing to figure out is if the dispenser mechanism still works and if you can get a motor to replace the damaged one, the rest sounds rather trivial in comparison to that