Conductive Paint December 20, 2018 02:05PM |
Registered: 10 years ago Posts: 56 |
Re: Conductive Paint December 20, 2018 03:27PM |
Registered: 6 years ago Posts: 50 |
Re: Conductive Paint December 20, 2018 04:05PM |
Registered: 9 years ago Posts: 465 |
Re: Conductive Paint December 20, 2018 04:33PM |
Registered: 6 years ago Posts: 50 |
Re: Conductive Paint December 20, 2018 11:00PM |
Registered: 9 years ago Posts: 5,232 |
Re: Conductive Paint December 21, 2018 02:51AM |
Registered: 7 years ago Posts: 1,007 |
Re: Conductive Paint December 21, 2018 08:32AM |
Registered: 13 years ago Posts: 1,797 |
Re: Conductive Paint December 21, 2018 03:47PM |
Registered: 5 years ago Posts: 1 |
Re: Conductive Paint December 21, 2018 10:12PM |
Registered: 6 years ago Posts: 50 |
Quote
MKSA
Conductive paint on the bed ? Indeed ! But ? Force sensitive resistor ? Why not but what about strain gauge or piezo or ... ? Yet, let's make it simpler and have just one sensor integrated in the printhead
Plastic blob on the nozzle ? No big deal, home when all is at working T°, eventually wipe before homing and make your sensor trigger around 1N.
Working like that for about 2 years.
Many ideas get reinvented regularly as they disappear then are forgotten, because they are not practical, unfit or too early (you got to be Da Vinci for that )
Sometimes you even end up with loops, like belts replaced by leadscrews replaced by wires then back to belts etc...
Re: Conductive Paint December 22, 2018 01:02AM |
Registered: 7 years ago Posts: 1,007 |
Quote
ruyvieira
Quote
MKSA
Conductive paint on the bed ? Indeed ! But ? Force sensitive resistor ? Why not but what about strain gauge or piezo or ... ? Yet, let's make it simpler and have just one sensor integrated in the printhead
Plastic blob on the nozzle ? No big deal, home when all is at working T°, eventually wipe before homing and make your sensor trigger around 1N.
Working like that for about 2 years.
Many ideas get reinvented regularly as they disappear then are forgotten, because they are not practical, unfit or too early (you got to be Da Vinci for that )
Sometimes you even end up with loops, like belts replaced by leadscrews replaced by wires then back to belts etc...
Some dude did a bed touch sensor for an Anycubic Delta using FSR's and an arduino and it's so sensitive the tape on his build platform didn't even have any marks from the nozzle. I bought a piezo kit which was just an OPAMP and a couple of piezo discs and just couldn't get it to work reliably, plus it was really easy to destroy two of the disks.
Here's it in action:
[www.youtube.com]
And here's a kit much cheaper than the Precision Piezo and likely more reliable. It's just what I described: three FSR's and an Attiny85.
[www.ultibots.com]
Here's a dude doing it with just an opamp circuit (the kind that comes with arduino "soil moisture sensor"). He needs to adjust the opamp reference just for the temperature he wants. An Attiny85 could do this on the fly.
[www.youtube.com]
Now I really need to get me some FSR's
Re: Conductive Paint December 22, 2018 09:20AM |
Registered: 6 years ago Posts: 50 |
Re: Conductive Paint December 25, 2018 02:44AM |
Registered: 9 years ago Posts: 465 |
Re: Conductive Paint December 25, 2018 03:17AM |
Registered: 9 years ago Posts: 5,232 |
Quote
ruyvieira
You know that's actually a good idea? You can make one with two bits of copper clad and a sheet of conductive foam, both of which I just happen to have lying around
Re: Conductive Paint December 25, 2018 06:23AM |
Registered: 7 years ago Posts: 1,007 |
Quote
o_lampe
Quote
ruyvieira
You know that's actually a good idea? You can make one with two bits of copper clad and a sheet of conductive foam, both of which I just happen to have lying around
You could wire it in a wheatstone bridge-fashion to amplify the difference.
Or use one on each side of the plate and use an OP-AMP to amplify the difference.
Re: Conductive Paint December 25, 2018 12:01PM |
Registered: 6 years ago Posts: 50 |
Quote
MKSA
Quote
o_lampe
Quote
ruyvieira
You know that's actually a good idea? You can make one with two bits of copper clad and a sheet of conductive foam, both of which I just happen to have lying around
You could wire it in a wheatstone bridge-fashion to amplify the difference.
Or use one on each side of the plate and use an OP-AMP to amplify the difference.
Not could, MUST !
If you don't see these FSR given in ref, used for Z homing it is because people who can design the required mechanic, electronic concluded they are not the best choice for it.
BTW A strain gauge IS a FSR
.
Re: Conductive Paint December 25, 2018 12:31PM |
Registered: 9 years ago Posts: 1,671 |
Re: Conductive Paint January 03, 2019 06:42AM |
Registered: 7 years ago Posts: 1,007 |
Re: Conductive Paint January 03, 2019 07:54AM |
Registered: 6 years ago Posts: 50 |