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DIY digital spool scale tells you the way a lot filament is left

DIY digital spool scale tells you the way a lot filament is left

Arduino GroupDecember sixth, 2022

We’ve all been there: you’re about to start out a brand new print job and the filament on the spool is wanting fairly sparse. You begin the print hoping that there’s sufficient filament for the job, nevertheless it runs out 90% of the best way by way of and your half is ruined. A filament runout sensor will assist you to handle this downside when it happens, however this DIY digital spool scale will stop the issue altogether.

Each widespread slicer available on the market will present a reasonably correct estimate of the quantity of filament (in mass and size) {that a} job would require. To find out you probably have sufficient filament, you simply have to know the size of the filament left on the spool or its weight. Determining the size is nearly inconceivable except you observe the feed over time, however it’s straightforward to weigh the filament. So long as you possibly can subtract the burden of the spool (set the tare), you possibly can decide you probably have sufficient filament. This gadget each weighs the present spool and subtracts the tare.

This gadget incorporates an Arduino Nano, a load cell, buttons, and an OLED display screen on a customized PCB. It suits right into a customized spool holder and weighs no matter spool is in place. The cool factor is that it shops profiles in EEPROM, so it will possibly bear in mind the burden of empty spools from completely different producers. You may both weigh an empty spool to get the tare worth (probably the most correct) or weigh a brand new spool and subtract the desired weight of the filament (reminiscent of 1kg). The latter is much less correct, since producers have a tendency so as to add just a little additional filament to be secure. However you’d be erring on the aspect of warning, in order that technique shouldn’t trigger any print failures.

When you do a whole lot of 3D printing and find yourself with a pile of partial spools, this scale gadget would make an ideal weekend mission to enhance your life.

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