PROTECT YOUR 3D PRINTER WITH THIS 3D TEMPERATURE GUARD
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Update /2/07/2018
Software core is ready and i am adding features day by day .. updating software log as i go along.
I am currently writing the code for this project , hopefully by the beginning of July i will have my prototype going to test it and update these pages further .
icons.bmpIcons for main screenBitmap Image File - 606.00 bytes - 06/26/2018 at 07:28 |
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3DGUARDIAN.pngSplash ScreenPortable Network Graphics (PNG) - 2.93 kB - 06/26/2018 at 07:28 |
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Added Sensor detection on boot
Added smoke sensor MQ2 - Tests ppm and checks air quality while reading temperatures
Updated Intro screen to include mode, smoke MQ2, Alarm state.
typical dump from board
Smoke Sensor Installed
Smoke Sensor Reading :343
Concentration of gas
LPG: 522 ppm
CO: 17465 ppm
Smoke: 1917 ppm
00Reading Mode type :0
Storing Mode type :0
Checking for Sensors connected to the board
Error Check Sensors - Not Connected
Error Check Sensors - Not Connected
Error Check Sensors - Not Connected
Error Check Sensors - Not Connected
Error Check Sensors - Not Connected
Error Check Sensors - Not Connected
08/07/2018
Add alarm screen with buzzer, sounds buzzer when alarm is triggered !
saves alarm state to eeprom .
-- Stable version - Available in my tindie store !
-Still working on wifi options
To do
second menu screen
wifi option
add some more nice features !
04.07.2018
Fixed alarm status page and red button - now when a sensor overshoots and meets the set temp an thermal runaway screen appears and buzzer sounds to alert user, then screen moves to a screen to reset the condition using the red button.
I am adding an MQ2 sensor , to detect dangerous gases and smoke. still awaiting sensor but coding is already set.
To test the prototype on my delta printer and next is to do a nice case for it !
Soon this project will be available in my tindie page !
Software Log Update
02/07/2018
Added feature to display the menu according to the mode jumpers selected
added caution thermal screen when alarm is triggered
added reset screen and button option to reset the alarm
To test alarm screen
To do
Add another menu screen to include more menu features !
Add wifi option
Add status screen.
27/06/2018
Added
-Splash screen 3D Guardian
-Icons for main screen
-formatted the set temp and alarm on screen
-added reading of 3 sensors
- added condition to monitor temperatures per channel with set temp and trigger the alarm
-added the menu feature
-added Instant saving to eeprom of set temp values in case of power cut.
To Do :
- ranges when adjusting set temp
- add jumpers 2 to define 1 or 2 hotends
- add jumper to define id heatbed is installed
- add gui graphic thermal runaway screen when alarm triggered !
- test it in a real scenario !
- make tweaks with icons
25/06/2018
- coded the core and added the splash logo and main screen icons.
- added to monitor 3 NTC sensors
- added set temp value and sensor reading on oled display
To do
- add menu system to edit the max temp and set temp values
- add the conditionals to check for
- add the warning icons and thermal runaway icons
- add buzzer to warn user
- add counter to allow pool before triggering realy
- add save to eeprom to save all details
- add alarm tone if over temp detected.
three independent sensors monitors the temperatures. this can be easily be installed by using a copper clip i designed.
Are you doing any watchdog signals back to the printer so that the printer stops if this fails? That way, they check each other's running status?
the unit is independent but that is a nice feature i can implement
yes maybe that will work, and cost you a fuse each time it is triggered.
my solution will switch the supply off and once it is reset from the controller it returns to normal state. no blown fuse !
Yeah, my application was rather unique given it was massive and drawing 60-75A. Easier to find mosfets in that range than relays. The one time if failed (before I added the failsafe) it had heated the entire room to 35C before I killed it. Scary.
Still, I did like the simplicity of it. No code, just the mosfet and a comparator, and pop if it got too hot. Of course it never had the chance to trip after that, but I tested that it would with a lighter..
Single mosfet (or SCR) directly across the power rails. Trigger it, fuse blows, machine down.
How About - detection - warning - power down - wait for user to reset condition - back on track !
jmcservv
ben biles
Luca Fabbri
Mark Heywood
Films4You
How does this trigger a fault? Does it just query the printer directly or is there some sort of sensor redundancy?