SPA2-2 servo power amplifier

• Digital servo power amplifier to accommodate between 3 and 7 axes

Two base SPA2-2 units are available

• SPA2-2 3-axis: basic 3-axis configuration suitable for conventional CMMs fitted with brushed dc motors. It can accommodate tacho, tacholess and encoder velocity feedback systems. An additional card can be fitted to extend this unit to a 4-axis system.
• SPA2-2 6-axis: suitable for installations requiring between 5 or 6-axis amplifiers. It can accommodate tacho, tacholess and encoder velocity feedback systems. An additional axis card can be fitted to extend this unit to a 7-axis system.
• Two SPA2-2 units can be combined in a single system permitting a servo power amplifier solution with an overall power rating of 1100 W.

Configurable motor voltage

• The SPA2-2 motor voltage can be configured by software to support a wide range of motor voltages within the range of 12 V 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, tacholess or encoder compatibility

• Three control loop feedback methods are integrated into the standard design of the system, these are analogue tacho based feedback system from the motor, obtaining the feedback from the scales of the CMM or from a motor mounted encoder system.

Specification

■ Standard specification

- Not available

(1) Peak power of 600 W can be drawn for a maximum of 50 seconds

* SPA2-2 4-axis requires additional axis card

** Output voltage should approximately match input voltage