Stepper Expander
Release status: working
| Description | For when you need more stepper drivers on your printer.
|
| License | CC-BY-NC-SA
See License section below |
| Author | |
| Contributors | |
| Based-on | |
| Categories | |
| CAD Models | |
| External Link |
The Stepper Expander X1/2/3 is designed as an easy way to add more stepper drivers to your 3D printer and other electronics.
It can also be used to repair / patch-up boards where the stepper driver chip is SMD soldered on the board like Printrboard, Melzi.
Stepper Expander X1
Stepper Expander X2
Stepper Expander X3
Contents
Expansion
RAMPS
Repair
There are many different 3D printer control boards and variations thereof but the general steps are the same.
Melzi
First remove any components that are coursing any problems from the stepper driver you want to replace.
Identify the contact points for DIR, STEP and ENABLE.
As the traces can vary from one board version to another it's recommended to make the connections directly to the MCU unless there are other obvious alternatives.
The 5V and GND are usually easy to find at the capacitors.
Cut the signal traces to the defective stepper driver so it won't make any trouble in the future.
Take a 10 wire ribbon cable with a 2X5 female pin header connector and cut it to your desired length.
For the Stepper Expander X1 only wire's 1, 2, 3, 5 and 7 are used.
Wire 1 = 5V
Wire 2 = GND
wire 3 = DIR
Wire 5 = STEP
Wire 7 = EN
Solder the wires to the right connections.
It's a good idea to secure the wires to the board with hotglue or similar to prevent them from breaking of due to vibrations.
Connect the stepper motor to the Stepper Expander and the power terminals on the Stepper Expander to the main board's power input and you should be good to go.
