JMC servo motor with integrated driver 180 Watt and brake - software version 6

The motors have inputs for pulse, direction and enable, signals which are mostly available with TTL level, 0-5V. At the input for direction the signal level decides for clockwise and anticlockwise rotation. At the input pulse a clock signal is applied, the frequency of the signal determines the position of the shaft: Each pulse makes the motor turn one step further. The number of steps per revolution can be set with the free software. The input for enable allows to switch off the motor.
Common CNC controllers provide these signals, so the motors can be connected directly.

Servo motors are special electric motors that allow control of the angular position of their motor shaft as well as the rotational speed and acceleration. They consist of an electric motor that is additionally equipped with an incremental encoder for position determination. The rotational position of the motor shaft determined by the sensor is continuously transmitted to control electronics, the so-called servocontroller, which regulates the movement of the motor according to one or more adjustable set values - such as set angular position of the shaft or set speed - in a control loop.

This control loop is provided with preset values ex works, but these rarely fit exactly. It is therefore necessary to set the appropriate control parameters with the help of the free software. The parameterization software is free and available for download. If the settings are incorrect, the position of the shaft cannot be controlled exactly, the position then overshoots or readjusts after standstill. A tuning of the parameters is therefore always necessary, so that positions can be approached exactly. 

This is the difference between servo motors and closed-loop stepper motors, which also have position feedback, but rarely need to be specially adjusted.

Yes, the JMC motors have the clock/direction inputs which can be controlled with TTL signals from 3.3V. There are for Arduino and also for Raspi various libraries for the control of stepper motors, these can be used unchanged also for servo motors. The outputs of an Arduino can be connected directly to the inputs of the motor. For permanent operation we recommend to use a shielded cable.

Yes, the JMC engines have the latest software version 6.05. They were purchased directly from the main German importer and are brand new and tested.
 

The shaft has a length of 21 mm.
 

These servo motors are real AC servos. They are therefore AC motors that can be precisely controlled by position feedback. This allows you to achieve high speeds, up to 3000 rpm, and can thus move axes very quickly. Acceleration is also greater than with stepper motors, since the rotor has a lower moment of inertia due to its lower weight. The motors have no noticeable cogging torque at rest, as stepper motors do.
 

The motors have a RS232 interface, which can be used on modern PCs via a USB->RS232 converter. Older PCs and notebooks still have a RS232 interface with SUBD-9 socket, but this is becoming increasingly rare.

But with the USB converters this is not a problem, with them you can connect the PC to the motors via USB and change the parameters.

So you need a USB-RS232 converter and a RS232 cable, both we supply you with pleasure, in addition we put a connection description which wire color is connected to which terminal. The parameterization software is free of charge and available for download.