Renishaw apply innovation SPA2, Руководство по установке

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System description 9
1 System description
The SPA 2 is a digital servo power amplifier solution designed specifically for use with the Renishaw UCC 2
or UCC lite controller.
The SPA 2 is capable of controlling up to seven axes of movement but is customer configurable to the
requirements of the installation.
The features offered by the SPA 2 are:
•
Two base units
•
SPA 2 3-axis: This is the basic 3-axis configuration suitable for conventional CMMs fitted with
brushed dc motors. It can accommodate both tacho and tacholess velocity feedback systems
and, with the addition of an encoder interface card, it can also accommodate encoder velocity
feedback. An additional axis card can be fitted to extend this unit to a 4-axis system.
•
SPA
2
6-axis: This configuration is suitable for installations requiring between 5 or 6 axis
amplifiers. Like the 3-axis version it can accommodate both tacho and tacholess velocity
feedback systems and, with the addition of encoder interface cards, it can also accommodate
encoder velocity feedback. An additional axis card can be fitted to extend this unit to a 7-axis
system.
•
Two SPA 2 units can be combined in a single system permitting a servo power amplifier solution
with an overall power rating of 1200 W.
•
Configurable motor voltage
•
The SPA 2 motor voltage can be configured by software to support a wide range of motor
voltages within the range of 12 and 60 V. The current limit can also be configured up to a
maximum of 5 A continuous, 10 A peak.
•
The voltage setting of each axis is independent and therefore it is possible to have each
machine motor driven by a different voltage.
•
DC analogue tacho or tacholess compatibility
•
The UCC
2
or UCC
lite
and SPA
2
control solution has the ability to support different types of
velocity control loop based on the feedback to the controller.
•
Two control loop feedback methods are integrated into the standard design of the system, these
are either an analogue tacho based feedback system from the motor or obtaining the feedback
from the scales of the CMM.
•
Optional encoder (digital) tacho compatibility
•
The SPA 2 offers the ability to support encoder tacho based feedback to close the velocity
control loop as an optional interface card.
NOTE: The UCC lite product only permits 3-axis of machine control.