Installation guide

10 System description
1.0 System description
The servo power amplifier (SPA1) unit is a 3-axis variable speed drive for permanent magnet DC servo
motors, designed for use with the Renishaw universal CMM controller (UCC1).
The unit contains three proprietary servo power amplifiers, contactor circuitry and a power supply.
1.1 SPA1 kit components
Each SPA1 kit (part number A-1333-0008) contains the following components:
1.1.1 Servo power amplifier unit
This unit contains contactor circuitry and a power supply to enable the movement of a system, the
capability of the SPA1 unit is :
• 336 W continuous
• 480 W peak per channel
• 480 W maximum total power
1.1.2 Connection cables
Three connection cables are supplied with the SPA1 system. These cables are as listed below
- MCU (joystick) daughter card ESTOP connector to UCC1 Comms CH1 connector for the Emergency
Stop signal.
- SPA1 “SPA” connector to UCC1 “Servo Power Amplifier” connector.
- SPA1 “machine I/O” connector to UCC1 “Machine I/O” connector, incorporating an additional
connector for interconnection of other system signals.
1.1.3 SPA drives
- 3 off propriety SPA drives are supplied.
- The drives are supplied by Control Techniques™ and are the “Mini Maestro™” DCDx7/14 model.
1.2 SPA1 accessories
1.2.1 Service pack
The service pack (part number A-1333-0017) contains the following components that will assist in the
connection of the SPA1 to CMM installation.
- 3 off Motor connectors including backshells.
- 6 off Power pins for motor connectors (7W2).
- 4 off dil headers.
- 4 off 20 K multi-turn potentiometers.
- 300 mm length of wire.
- 1 off 37-way D connector including backshell for machine I/O connection.
- 1 off 9-way D connector including backshell for Emergency Stop connection.
1.2.2 Replacement SPA drives
If required replacement SPA drives (part number P-MC10-0001) can be ordered from Renishaw for
support purposes.