MKS Gen V1.4 3D

mksgen.jpg

tmc2208.jpg

KeyeStudio MKS Gen V1.4 3D clone.

This is controller board designed for 3D printers but can be used for whatever purpose.

It supports 5 stepper motors using easy to buy controllers.

This type of board is known as a RAMPS controller since it contains an ATmega2560 compatible with Arduino.

Pinout

GPIO

Stepper 1

E0 Arduino AVR
STEP 26 PA4
DIR 28 PA6
ENABLE 24 PA2

Stepper 2

E1 Arduino AVR
STEP 36PC1
DIR 34PC3
ENABLE 30PC7

Stepper 3

X Arduino AVR
STEP 54PF0
DIR 55PF1
ENABLE 38PD7

Stepper 4

Y Arduino AVR
STEP 60 PF6
DIR 61 PF7
ENABLE 56 PF2

Stepper 5

Z Arduino AVR
STEP 46PL3
DIR 48PL1
ENABLE 62PK0

MOTOR

A `generic' cable from eBay (these vary)

Factory    Centre pair swapped
A+ RED     A+ RED
A- GREEN   A- BLUE
B- BLUE    B- GREEN
B+ BLACK   B+ BLACK

My generic cable has A- B- twisted at the motor (JST) end so not usable with my motor on this board without swapping the centre pair of cables (at either end).

For JST, just lift the plastic tooth and pull the cable out, very simple.

PORT

1  2  3  4
2B 2A 1A 1B
B+ B- A- A+
B  G  B  R    BLACK GREEN BLUE RED

MICROSTEPPING

Jumpers select the micro-stepping mode which will default to 32 microsteps/step for a DRV8825.

Schematic

The Schematic has a missing pull-up resistor of 100K on the SLEEP/RESET pins (named SLP) on each motor controller unit which keeps each controller awake and out of reset.

Resources

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