Makerbase SERVO42C Closed loop Stepper Motor Manual（1） Install the motor - makerbase-mks/MKS-SERVO42C GitHub Wiki

Part 1 Product introduction

MKS SERVO42C is an upgraded version of MKS SERVO42B, It built-in Field-Oriented Control algorithm , position/speed/ torque closed-loop ,4 Half bridge driver with 8 MOSFET, it makes the motor quieter, lower vibration and Lower calorific. it supports serial port control.

1.1 Hardware interface description

1.2 Features

Easy to install and wire.
Position/speed/ torque closed-loop , it can run at high speed without losing step.
Field-Oriented Control , low noise ,low vibration and Low calorific.
4 Half bridge driver with 8 MOSFET, high operating efficiency.
14bit magnetic encoder，high angle resolution.
Support 1-256 subdivision, odd subdivision (such as 11 subdivision) is also available.
Support motors with 0.9 degree or 1.8 degree .
Maximum speed 1000RPM.
With ustart interface,you can connect the comupter by serial port,for parameter adjustment and query.

Part 2 Install the motor

2.1 Hardware list

MKS SERVO42C PCBA	1
Adapter board (MKS APT)	1
Hexagon socket screw	4
ABS gasket	4
6*2.5 Radial Magnet	1
Allen wrench – M3	1
6pin Data Cable	1
4pin Motor Cable	1
NEMA17 stepper motor	1

The hardware list is shown in the figure below.

2.2 Phase line

1.The resistance of the motor phase A (A+/A-) is about 5.0Ω.

The resistance of the motor phase B (B+/B-) is about 5.0Ω.

Important note: please confirm the phase A and phase B of the motor by a multimeter , as shown below.

If the motor phase is wrong，The screen will always show “Phase Line Error！”, please power off and adjust the motor wiring sequence（A+ A- B+ B-）.

2.if the sequence of your motor is different from the 4pin motor cable, please adjust it by yourself. Motor cable wiring sequence adjustment method：

①　Poking the end of the stub 6P with toothpicks/tweezers.

②　Plugging it back in according to the other motor line sequence in the picture.

2.3 Install the motor

1.Fix the magnet：

①glue：3M glue (preferred), 502 glue, etc.

②The magnet should stick to the middle of the motor shaft as near as possible, the magnet shoule be laid flat.

③Make sure the magnet is firmly attached.

Put the gasket on the screw holes：

The default size of the gasket is 3×7×2 mm.

Fix the PCBA board
Screw the screws (The length of screws is 40mm.)
plug in the 4pin motor cable.
The motor has been installed, as shown below.

Part 3 Modules wiring description

3.1 3Dprinter/engraving machine wiring

Pay attention to the direction of the adapater board（The EN pin of the adapater board is aligned with the EN pin of the MKS GEN_L board,then plug it in）