Ender 3 Microswitch Bracket by Abrash9

Last crawled date: 3 years ago

Decided to add a auto shut off to my ender so I Don't have to monitor it and know it will shut off safely.
I also have a BLINK MINI camera set up so I can tune in and watch if I need to. I also have the power unit hooked up to a WIFI PLUG incase I need to shut it down remotely if I am away.
This works amazing and happy with how it all turned out.. yes there are simpler options, but this is by far the safest.
TO BUY:
Microswitch with Wiringhttps://www.amazon.ca/gp/product/B071JV158X/ref=ppx_yo_dt_b_asin_image_o04_s00?ie=UTF8&psc=1
Enclosed High Power Relayhttps://www.amazon.ca/gp/product/B00WV7GMA2/ref=ppx_yo_dt_b_asin_image_o04_s00?ie=UTF8&psc=1
9V Power Adapterhttps://www.amazon.ca/gp/product/B082VVSLGR/ref=ppx_yo_dt_b_asin_image_o03_s00?ie=UTF8&psc=1
HARDWARE NEEDED:
1x M4 x 18mm (16mm works but it takes some fidgeting with the nut)
1x M4 Nut
STEP BY STEP:
Remove Front Screw from right of Belt Tensioner
Insert Longer M4 screw through both the microswitch and the Printed stop
plug in your wires and run some v slot covers (or cable clips) to the back of the power supply
Wire the Switch as followed:
Green to (-) terminal
Black from micro switch & (+) power from 9v adapter to the (+) side terminal
Red from Micro Switch & Other wire from 9v adapter get tied together
Plug Printer into NORMALLY OFF outlet
Plug 9V Adapter into ALWAYS ON outlet
Add a small M4 Nut onto end of the last screw under the bed
optional: I added a tiny dab of superglue to the top of the microswitch to hold it to the Bracket
8.Change the end .GCODE on your cura program
this is my custom code and should work well with Cura 3 Printers. (copy and paste into your Machine Settings under end code)
; Ender 3 Custom End G-code
G4 ; Wait
M220 S100 ; Reset Speed factor override percentage to default (100%)
M221 S100 ; Reset Extrude factor override percentage to default (100%)
G91 ; Set coordinates to relative
G1 F1800 E-3 ; Retract filament 3 mm to prevent oozing
G1 F3000 Z10 ; Move Z Axis up 10 mm to allow filament ooze freely
G90 ; Set coordinates to absolute
M104 S0 ; Turn off Extruder temperature
M140 S0 ; Turn off Heat Bed
M106 S0 ; Turn off Cooling Fan
M107 ; Turn off Fan
G1 X0 ; Zero X axis
G4 s20 ; Wait 20 Seconds
G1 Y233 F1000 ; Move Heat Bed to the front for easy print removal
M84 ; Disable stepper motors
here is a youtube guide (not my video) of a similar setup but he uses a 9v battery)https://www.youtube.com/watch?v=_dvHjjSTGZk&list=WL&index=16&t=380s&ab_channel=CHEP