Renishaw H-1000-5068-02-A SPA1 s Installation Guide download pdf (Page 24)

22 Installing the SPA1

4.5 Adjusting the SPA drives

Please refer to the Renicis UCC1 controller installation program User’s guide (H-1000-5058), chapter 6

for the procedure on how to set up the SPA drives.

The Mini Maestro drive offers the ability to adjust various parameters such as peak current, motor internal

resistance compensation and armature voltage speed feedback.

Most applications do not require these parameters to be adjusted. However, if adjustment is required

please refer to the Mini Maestro User guide (0470-0005, included with each SPA drive) for guidance.

4.5.1 Max speed adjustment

When using the Mini Maestro SPA drives and the SPA1 it has been experienced that it is not always

possible to achieve the desired maximum move speed by adjustment of the ‘MAX SPEED’ potentiometer

on the drive.

If this is the case the ‘RT’ resistor on SK1 on the SPA drive will require adjustment (default value = 10K0).

This resistor normalises the tachogenerator input signal and adapts the drive to the voltage constant of

the tachogenerator.

If adjustment to the ‘RT’ resistor is required then the following procedure is recommended.

CAUTION:

• Before the drive is removed from its guide way, mains power to the SPA1 must be switched off.

• The heat sink on the drive could be warm to touch.

• Anti-static precautions should be used when handling the SPA drives.

Fig14-LocationofRTonthedrive

NOTE:

• This procedure assumes that you have prepared and will be using the SPA1 service pack. (refer to

section 4.1).

• If more than one axis requires adjustment then this procedure should be repeated for each axis in

turn.

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Renishaw H-1000-5068-02-A SPA1 s Installation Guide Page 24