Controlling the motor

Our motor control units come in many different versions, with controllers and amplifiers for laboratory use as well as for integration into OEM devices.

We can also license the drivers for customers that want to build their own driver electronics.

Acuvi Piezo Motor PMD401 controller

Closed or open loop controller with sub-nanometer resolution

  • 8192 microsteps
  • Multi-axis control
  • Stackable
  • Easily integrated

Piezo LEGS® Controller PMD401

The PMD401 controller is primarily intended for use with our standard range of piezo motors up to 40N and our rotary piezo motors.

The PMD401 is a fully featured miniature controller for open loop and closed loop operation that can be easily stacked to form a multi-axis controller system. It can be connected to the customer’s mainboard for integration in OEM applications. Host communication is done via 2-wire RS485 through ASCII commands.

The PMD401 can also be used as a servo amplifier where the external controller regulates the speed via an SPI interface. A breakout board with terminal blocks for easy access to power and communication is offered optionally for customers who want to get application development started straight away. It provides sub-nanometer resolution and speed in the mm/s range.

Specifications PMD401

Type

Value

Note

Number of axes

1

 

Multi axes support

Yes

Units can be RS485-chained for multi-axis

True speed control

No

Only stepping rate controlled

Resolution

8192 microsteps

Each full step of about 5 µm is divided into 8192 steps

Maximum stepping rate
(Full step frequency – Hz)

1500

Depends on motor

Supported encoders

Quadrature

ABZ, 20 MHz counting

SSI

SSI 8–30 bits, 330 or 130 kbps

BiSS

18/26/32 bits, 330 kbps

Analog

Analog interface ±10 V (12 bits, 5 kHz)

Host communication

Two-wire RS485

Commands are sent in ASCII format, 115.2 kbps (n81)

Servo interface

SPI

16 bits (signed), max 15 Mbps

General I/O

4 in

Depending on encoder type and use of limit switches

3 out

Stacking connector

6-pole, ERNI MicroStac 114711

GND, 48 V, RS485

Motor connector

5-pole, JST SM05B-SRSS-TB

Two connectors, parallel connection

Encoder/servo connector

6-pole, JST SM06B-SRSS-TB

Input for sensors or SPI servo interface

Limit switch

Yes

Input for external limit switches

Communication connector 

3-pole, JST SM03B-SRSS-TB

Input for RS485, or use stacking connector

Power connector

2-pole, JST SM02B-SRSS-TB

input for 48 V supply, or use stacking connector

Power supply

48 V DC, 5 W

48 V DC ±5%

Dimensions

59 x 39 x 9.2

mm

Dimensions of the PMD401

Want to know more – contact one of our engineers

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