Ebox

Contents:

• Contents:
• Safety
• Octopus Pro Wiring
  • Configuration Notes
• Ebox Assembly
  • Hardware Views
• Ebox Cable Lengths
• Ebox Wiring
• Tips

Safety

Important

Please ensure you read the Safety section of this guide.

Disclaimer

This is a DIY (Do-It-Yourself) experimental project. This information is provided "as is" without any guarantees or warranty, and is not certified for any commercial or critical applications. Use it at your own risk. The creator assumes no liability for damages or injuries resulting from its use, including but not limited to fire, electric shock, personal injury or property damage. By using this you agree to the terms of this disclaimer.

Octopus Pro Wiring

Note: The WAGO connector holders are attached with strong double sided mounting tape.

Configuration Notes

Stepper Jumpers:

• The steppers (TMC2240) are set up in the default configurations with all four jumpers set to SPI mode
• X, Y and Y1 drivers have their power jumper set to the Motor Pwr (36V) position

Stepper Mapping:

Driver	Motor
X	X Motor
Y	Y Rear Motor
Y1	Y Front Motor
Z	Z Left Motor
Z1	Z Right motor
E	Extruder Motor

⚠️ Lower the stepper current from 1.6A to 1A if testing the printer with the Ebox door open and no active cooling. You might experience shutdown driver errors otherwise.

MAX31865:

For the 2 wire PT1000 hotend thermistor connected to the Octopus Pro though the MAX31865 IC you need to set the dip switches to the following positions:
1 ON | 2 ON | 3 OFF | 4 ON

Ebox Assembly

Ebox - Online CAD Viewer

Main Components List:

Type	Item	Quantity
Mainboard	Octopus Pro v1.1 h723	1
Host	BTT Pi v1.2	1
Fan	Axial 6025	2
PSU	Meanwell LSR-350-24V	1
PSU	Meanwell LRS-150-36V	1
Connector	WAGO 221 5pos	3
Power Socket	3P Fused Terminal	1

Ebox Part List :

Type	Item	Quantity
Magnet	6x3 mm	4
Heat Insert	M3 Short 5x4	50
Screw Button Head	M3 10mm	3
Screw Button Head	M3 20mm	1
Screw Button Head	M3 6mm	5
Screw Button Head	M3 8mm	3
Screw Countersunk	M3 10m	17
Screw Countersunk	M3 20mm	1
Screw Countersunk	M3 8mm	10
Screw Countersunk	M4 10mm	3
Screw Socket Head	M2.5 8mm	4
Screw Socket Head	M3 30mm	8
Screw Socket Head	M3 8mm	8

• The following part groups have to be glued together with CA glue

• Glue the support standoffs on the back of the mainboard mount

Hardware Views

View Map:

Sections:

Ebox Cable Lengths

Fans

Cable	Length
Ebox Fans	23 cm

* To be updated

Ebox Wiring

• Due to size constraints, the fork terminals that connect to the main PSU might need to be bent slightly at an angle following the cable direction depending on the type used.

• The main wire loom is secured with a zip tie though the holes in the cable guide

Tips

• Please ensure you read the Safety section of this guide.
• Ask for professional help when dealing with AC connections
• Always disconnect the power cable when working on the electronics or opening the box exposing the AC side
• Use the appropriate tools for crimping (check the BOM for recommendations)
• Do not tin wires going into ferrules or fork connectors
• Do not tin or use ferrules for wires going to Wago splice connectors
• Check the tightness of spade connectors (when NOT powered) and inspect the AC socket area from time to time to check for any signs of damage due to arcing or heat. This is a known point of failure that has been observed on other printers in the past

Videos

• Crimping Fork Connectors: https://www.youtube.com/watch?v=goxVeefDpQg