Newest version of 30 mm diameter stator Start Kit for evaluating PCBMotor technology. Includes motor, driver electronics and 200 lines full step encoder and position sensor. The 30 mm diameter Start Kit is designed to get you testing our PCBMotor technology instantly.
The new version can be operated in Software mode trough a RX/TX interface where all the positioning, settings and calibration commands are available i the controller with ASCII commands. It is also possible "just" to use the driver as and operate the motor through TTL pins and is pin compatible with previous versions. For further information, follow our Steps to Success in How we Work, in the top menu.
63 x 42 x 11mm (LxWxH)
In the box:
- 1 PCBMotor - 30mm diameter stator mounted with Piezo's and a rotor with a 200 lines encoder, with axle (ø2.3mm) and bearing, and placed on a built-up driver platform with position sensor.
- 1 USB - FTDI cable, for power and communication.
It is possible to write custom communication software e.g. for LabView as long as all communication use ASCII characters.
It is a straight forward modem (RX/TX) communication. However, in other programs as Labview DTR is normal set to high:
The DTR modem signal is toggled low to do a software abort to stop a long sequence, so your LabView software should pull DTR inactive (high) when not used. Otherwise the motor will not turn (apart from the STB command!). There is a short note on this at the bottom of the help-txt: STOP commands D,S,G & U: Toggle DTR-signal on PC or short terminals DTR & GND
Theory of operation:
All PCBMotors are designed to have a mechanical resonance in the 40–50 kHz range and the drive voltage must have a frequency close to the motor resonance to turn the motor. Since the resonance frequency changes with temperature and other external conditions, it is necessary to track the motor resonance by a control circuit in the driver.
The driver has a programmable step-down voltage supply to control the motor current while the frequency is set precisely to the resonance peak.
The driver control circuit is designed to measure the current when the motor is running and adjust the frequency to keep the current at the resonance peak.
If the motor runs continually self-heating will change the resonance towards a lower frequency (approx 80Hz per °C) and the driver must compensate. When the motor is stopped the oscillator frequency is stored in EPROM and used as starting point next time the motor is turned on.
The driver EPROM stores the individual settings for each motor so differences in resonance between motors will automatically be taken care of by the driver and when another motor is selected, the driver will change to the appropriate values. See more on this below in the discussion of the commands.