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Makerbot Replicator 2 Out Of Filament detector

by Deepsiks, published

Makerbot Replicator 2 Out Of Filament detector by Deepsiks Mar 31, 2014
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This is an Out of Filament detector for the Makerbot Replicator 2 with Sailfish firmware installed. It uses the p-stop option that is only available when using sailfish firmware. Please read the following links before attempting.
Switch used is a simple OMRON ball-roller micro switch. When the filament runs out, the switch lever opens.

Sailfish firmware:

Use of the P-stop function:

*A version with an oiler/cleaner is here:

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Why don't you add the design files (openscad etc)?, switches are quite different and one cannot customize it.

Ingenious,very well done:-)

This will also work on a printer running Marlin firmware. All you need to do is set the switch to activate the M600 "Filament Change" code. I used this forum topic to get it working : http://forums.reprap.org/read.php?1,297350,381605

Can you tell me the part number for the Omron ball roller switch that you used?

Sure will, however at the moment I'm out of country on a business trip in PI. I will answer as soon as I return/ get a chance.

very nice idea! I would suggest opening the connector holes a bit wider though, so that you can use a blade connector and not just push wire through the hole / solder it into place. It looks like your switch is designed to do both, but Blade connectors are easier and removable (as compared to solder)