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Filament length counter (Printrbot simple metal)

by UserUnrelated, published

Filament length counter (Printrbot simple metal) by UserUnrelated Jan 8, 2015
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Summary

ALL DEVELOPMENT HAS STOPPED.
I apologize, but the new version for the new easier-to-find counter I got has pretty much stalled out of existence. I don't plan on re-visiting this, as I've really just lost interest and moved on to other things.

I designed a filament counter to display the number of meters of filament used. (it displays the 1/10'ths place, hence the white-out decimal point)
It utilizes the core of a Veeder-Root 742946-201 non-resetable rotary counter.
I doubt you would be able to find another one of these out there in the wild, and the nearest sibling costs $100+, so I will work on a printable counter eventually. Maybe someone else will get to it before me, who knows.
http://www.ebay.com/itm/DANAHER-VEEDER-ROOT-0742845-001-MECHANICAL-RESET-COUNTER-5-DIGIT-XLNT-/150854138839?pt=LH_DefaultDomain_0&hash=item231f9b7bd7

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I AM WORKING ON A VERSION 2
that utilizes a $4 electromechanical counter available on ebay, and utilizes a 5v pulse signal.

The counter is en-route to me from china, so it might take a bit to get working on it.
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If you happen to have a compatible counter, great!
You need 1 of each part.
The orientation might be weird when importing the STL files, but just use your head.
I designed the "baseplate" in such a way that it could be mounted easily to other printers with the design of a custom mounting bracket.
This one comes with a simple zip-tie bracket for the aluminum handle of a Printrbot simple metal

This requires some rubber bands, bolts, and hole reaming to finish. I used 1/4 inch shoulder bolts that I had lying around.
You also need to cut and glue a rubber band around the counter gear.

Mine has been silently counting along flawlessly since I first printed it!

EDIT: I accidentally uploaded a .slprt file instead of the STL. I renamed the counter wheel and the counter output shaft gear to be less ambiguous.

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May 20, 2015 - Modified May 20, 2015

Try using this counter, its fully printable. im going to try and adapt it to this stl. http://www.thingiverse.com/thing:824671

Mechanical Counter
by LtDan
Aug 9, 2015 - Modified Aug 9, 2015
abcprint3d - in reply to DevWolf

Did you make it work??? Can you share some picture???

Just made the plastic parts. Any hints on the screws would be nice.

The counter... ...found a (the?) data sheet for the counter. (http://www.danaherspecialtyproducts.com/uploadedFiles/Siteroot/Veeder-Root/Products_and_Solutions/Counters/7428_7430_Spec.pdf)

The 7428 adds 10 counts per revolution. The 7430 adds 1 count per revolution.

The next (5th digit without the leading 0 in the part number) digit can be a 3 for counter-clockwise rotation increments the counter (or) 4 for clockwise rotation increments the counter.

The next (6th digit without the leading 0 in the part number) digit is the number of digits found in the counter.

I found a 743036-001 on ebay for $20. Should get it next Wednesday.

My plan is to either run it backwards to get a positive count or deal with the fact that it counts down.

There is a corner in the base plate that interferes with the mount piece. I claim that corner needs to be removed.

Ok thank you for your reply. You used PLA or ABS ? (How much for printing ?).

I used PLA... I can't recall off the top of my head, but it isn't too much. The most substantial parts are the base plate, and the counter wheel.

Fantastic idea Kyle ! But why counter on ebay have five numbers and yours have six numbers ???

Because the one with 5 numbers is the only one I can find that would be remotely compatible.

I am working on a 2nd revision with a cheap $5 coin counter, so that others can hope to construct the counter without having to dredge up a seemingly rare and archaic mechanical counter.

It's coming along slowly, I've been very busy with other things lately, but watch for rev2 before the week is up!

Repetier-Firmware stores it in the EEPROM. Works with Arduino-based boards with AVR chips... A lot simpler.

But not quite as fun ;)
The new counter is here, I am working on a version that everyone can enjoy (because the required counter is only $5!)

Well done! I like this idea a lot. I may try to Re-engineer the idea to hit a microswitch once per revolution, which would allow you to use "coin counter" type counters that run on 5v, like this one: http://goo.gl/l78P6t. It would be neat to get a resettable one as well, so you could also have a "trip odometer" .

Jan 8, 2015 - Modified Jan 8, 2015

That's a really good idea.
I can provide the .slprt of the baseplate if you want...
Or, what format would be best for you? Solidworks can export all kinds of stuff.
It'd be great to have a slightly more accessible version for others! I went through all this designing with this random counter I got at a surplus store for $5, then it turns out it's super rare and some sort of weird collectors piece!

I've been, and plan to, run mine as a main odometer, as sort of a "This is what my printer has accomplished" display.
I actually got the idea after seeing some "Printer achievement badges" and thinking "Yeah, anyone can print those out and SAY their printer has run for 500+ hours, but how could they PROVE it?"

EDIT:
I just bought one of these.
http://www.ebay.com/itm/260635200110
When it comes in, I'll do a "Filament counter V2, counters for everyone!"

Awesome! I look forward to the mark 2! It shouldn't need quite as many parts, either, and the counter could be relocatable!

You rock my friend. Each spool I have, and I have a few, will be getting one.

Thanks so much.

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