Low Filament Sensor

Hey guys my name is Justin, and I am an inventor and 3d printing enthusiast. I just finished testing my low filament detector for 3d printers. When your filament runs low it will sound the alarm giving you time to pause or reload your filament. This item is very simple but also very reliable, when your half way through a five hours print and your printer runs out of filament, this will save the day. It will also save you money by letting you use that last little bit of filament left on each roll.
Each unit comes with 5 tops so you can pick the color that matches your printer.
It will work with 1.75 or 3mm filament, by changing a part that is included.
I have it listed on my website eBay and amazon if you want to get it on my website use promo code reedswitch for 10% off.
My website
http://www.endlessparts.com/collecti...ant=8789525379
eBay
http://www.ebay.com/itm/low-filament...-/252117789218
Amazon
http://www.amazon.com/Filament-Senso...ilament+sensor
Check out the videos.
https://youtu.be/L4p95UDboJU
https://youtu.be/5jFUWdbMdmoAttachment 7548

Very Interesting !
I'm curious what type battery it uses
and is it easy to replace ?

i uses an off the shelf coin cell battery that cost less then a dollar.

you can replace it as needed but it will last years.

so it beeps when the last bit of filament goes through ?

Shame you can't monitor the actual filament on the roll.

Quote:

---

Originally Posted by curious aardvark

so it beeps when the last bit of filament goes through ?

Shame you can't monitor the actual filament on the roll.

---

Yes, It Should be called the 'NO filament sensor' instead of the 'Low filament sensor' ! ;)

I actually had a similar thought. Except, attach the switch end to a potentiometer to measure diameter variance in a section of filament as it is pulled through.

Quote:

---

Originally Posted by LAFilament.com

I actually had a similar thought. Except, attach the switch end to a potentiometer to measure diameter variance in a section of filament as it is pulled through.

---

! ! ! You Really Worry That Much about 'Diameter Variance' when you print???
What are you going to Do if it's a little out of tolerance?
Trash the Whole Spool ? :(

Or are you talking about when Making filament ?
I can see that would be Very Important when Making filament !

Quote:

---

Originally Posted by EagleSeven

! ! ! You Really Worry That Much about 'Diameter Variance' when you print???
What are you going to Do if it's a little out of tolerance?
Trash the Whole Spool ? :(

Or are you talking about when Making filament ?

---

Not specifically for when I print. Just a "shower thought" so to speak.

Quote:

---

Originally Posted by LAFilament.com

Not specifically for when I print. Just a "shower thought" so to speak.

---

Ah, one of Those !
I understand completely ! LOL ;)

The main problem we would have with 'Low filament sensor' is there is Only about 1" if filament that is exposed
outside the guide tube, going to extruders, at spool.
and there's no where to hang or attach the sensor at that 1" location . :(

Would require a special bracket mounted on back of printer
and it would make loading of filament even more difficult than it is already . :(

Two very easy ways to sense low filament:

1) Weight. Have a scale that beeps when you hit a certain minimum weight. Since you already know the base weight of the holder and spool, a low weight threshold is easy to calculate.

2) A hall sensor on the spool measuring rotation of the spool vs the linear travel of the filament (another wheel with a hall sensor). When the ratio hits a certain level, you about how much filament is left on the spool.

How loud is it? Will I hear it on the other side of the house with the bedroom door closed?