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SPA3-2 installation guide
www.renishaw.com
Introduction
The SPA3-2 is a 3-axis dc servo power amplifier and is a drop-in replacement for the SPA3. The SPA3-2 is compatible with the UCC controller
range and the MCUlite-2, MCU5-2 and MCU W-2 joysticks.
This system can operate on the majority of CMM structures without the requirement for changing motors.
Features
The SPA3-2 has the following improvements over the SPA3:
The primary advantage of the SPA3-2 is the ample machine I/O: six inputs and seven outputs as well as six I/O ports which are configurable
to be either inputs or outputs
Adjustable power supply voltage to readheads and motor encoders
Support for absolute BiSS readheads
Support for up to four axes of position feedback for dual Y scale machines
Operating specification
Three axis dc servo motor drive:
Independent axis voltage control of 12 V to 80 V
Independent axis current limits up to 9.5 A peak
Simulated linear power amplifier. Drive outputs are free from switching edges, eliminating noise from drive PWM, improving
repeatability and reducing emissions
Axis scale and motor encoder power supply: 5.25 V to 6.75 V, 0.5 A maximum (each)
+24 V 1 A power supply for CMM solenoids, solid state switches, machine user specific hardware
Digital input signals from air pressure, crash detection, all axis inner and outer travel limits and six user specific inputs
Digital output signals to control machine air, axis brakes and seven user specific outputs
Six configurable digital pins which can be independently configured to be either input or output
Issued 08 2020
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