Hardware Suggestion - Filament Clog or Binding Sensing

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Casale8
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Hardware Suggestion - Filament Clog or Binding Sensing

Postby Casale8 » Tue May 22, 2018 1:21 pm

This is a hardware suggestion for future builds. Or, perhaps a retrofit to the current N series/ Pro series.
This would likely require an additional height to the top of the extruder body.

-Above each of the drive gears (for single or dual) or the extruder body add a geared idler pulley (perhaps using the same as the driving gear). Make it adjustable so that tension may be placed against the filament to keep it moving (without causing real friction on load).

-Add simple intelligence such as an encoder to this idler gear.
The intelligence such that if the idler gear stops moving for a duration of time, as the filament to idler gear is to be fed (or pulled by the driving gear), then the print automagically pauses. This way one may be able to resume (with reloaded filament after clog or binding is cleaned up printing) - and not lose hours or days worth of printing.
-SCC
“One man's "magic" is another man's engineering. "Supernatural" is a null word.” -R.A.Heinlein

Jetguy
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Jetguy » Tue May 22, 2018 1:45 pm

Solution already exists and will integrate with existing Filament detection firmware and pause feature. You could literally plug this in today into the mainboard, load the firmware, and use it at the spools (does NOT need to be at the feeder) and it monitors the filament for movement over time (an adjustable setting). You simply reset the device (because it will be triggered just sitting there) at the start of the print and if the filament stops moving during the print for longer than X set time, then it triggers the pause now built into the FSR firmware. https://www.toybuilderlabs.com/collecti ... nt-monitor

It works in the same most basic way as the factory supplied Filament Detector solution.
It requires 5V, ground, and provides up to 2 triggered fault lines.
It's trivial to make a wiring harness for this. I can provide diagrams and testing over the next couple of days and have this sensor on hand.

Jetguy
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Jetguy » Tue May 22, 2018 1:47 pm

BTW, if you don't know, Toybuilder Labs tried to get that exact filament detector integrated back at the start of this during the Kickstarter.

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Casale8
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Casale8 » Tue May 22, 2018 2:25 pm

Thanks yet again Jetguy.

Any write-ups on how this would plug in to the Raise3D boards?
-SCC
“One man's "magic" is another man's engineering. "Supernatural" is a null word.” -R.A.Heinlein

Jetguy
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Jetguy » Tue May 22, 2018 3:08 pm

Well, obviously I haven't done it yet since i just typed that answer, but here is where it's going to come from.
https://www.raise3d.com/pages/filament- ... nstruction
Specifically, pay attention here to the factory supplied wiring harness.
Like I said before, this is 4 simple wires, power (5v) red wire, Ground black, and the 2 signal wires for left and right sensing.
Picture taken from the https://cdn.shopify.com/s/files/1/1069/4816/files/N2_-_N2_Plus_Filament_Run_Out_Sensor_Installation_Guide_3_e7a17569-42b6-47b8-abba-1778aa012dda.pdf?6873295948914139256
Filament detector wiring.jpg


So, the above diagram shows us the EXACT connection points and pins at the mainboard for where the signals and power we need for the tunnel detector come from.
So then we crack open the documentation on the Tunell detector.
https://www.toybuilderlabs.com/products ... nt-monitor and more specifically this https://cdn.shopify.com/s/files/1/0389/ ... 7545893959
Tunnel detector wiring.jpg


One method using 2 individual detectors
Tunnel detector wiring combined N2 Dual.jpg


The alternate way I think is to use a Tunnel Dual detector option, and then connect BOTH the white and green wires as shown in the Raise 3D harness to the same fault output line from the detector. Either side faulted triggers a pause. This needs more testing to prove, but no reason why this should not work I can see.

Jetguy
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Jetguy » Tue May 22, 2018 3:16 pm

Also, there is an alternate and maybe easier set of labeled pins to get the required 5V and ground from on the mainboard.
Alternate 5V connection point.jpg

Jetguy
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Jetguy » Tue May 22, 2018 3:18 pm

The reason this had not really been done to this point, until Raise 3D released both a standard Raisepack that supported filament detection pause and the matching FSR firmware update, this was not as practical for the user to install.

Actually, we hoped this was the system Raise 3D would have gone with, rather than the sensor they did go with.

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Casale8
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Casale8 » Tue May 22, 2018 3:34 pm

Didn't expect you write anything up. Assumed there may have been something already done.

Thanks again!
-SCC
“One man's "magic" is another man's engineering. "Supernatural" is a null word.” -R.A.Heinlein

Jetguy
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Re: Hardware Suggestion - Filament Clog or Binding Sensing

Postby Jetguy » Tue May 22, 2018 3:39 pm

Casale8 wrote:Didn't expect you write anything up. Assumed there may have been something already done.

Thanks again!


Sorry, again, just stating the why behind exactly why that (wiring diagram and instructions) didn't exist.
#1 we waited for the official firmware side of this just recently released (diy solution existed, but again, kind of waiting to see what Raise did).
#2 For whatever reason (logistics, money, deal gone wrong) the Tunnel Detector at one time was the proposed sensor. It still can and does work once Raise finally went the route suggested during the Kickstarter campaign.

It took literally 2 years to go full circle on this one.....


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