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6. Adjust the 'MAX SPEED' potentiometer fully anti-clockwise until the end stop click is heard and then
adjust the potentiometer 9 turns clockwise (centre position).
7. Follow the 'Setting the power amplifier velocity gain' step of the RENICIS UCC1 controller installation
program (user's guide H-1000-5058, chapter 6) and adjust the target speed to 25 mm/s using the
tachogenerator potentiometer.
8. Disengage the servos in RENICIS and switch off the mains power to SPA1.
9. Remove the SPA drive from the SPA1 by sliding out the drive from the front of the enclosure.
10. Remove the DIL header fitted to SK1.
11. Measure the value of the potentiometer fitted to the DIL header with a resistance meter. This now
determines the required value of the RT resistor.
12. Set the value of one of the 20 KΩ multiturn potentiometer fitted directly to a DIL header (contained in
the service pack refer to section 4.4) to the measured value of 'RT' (from step 11) and fit into SK1 of
the SPA drive, refer to figure 15.
13. Re-fit the SPA drive into the SPA1.
NOTES: It is recommended that a fixed resistor of the nearest preferred value should be fitted to a DIL
header and used as 'RT' if possible.
It is not recommended to retain the potentiometer extended on the wire as this is likely to introduce
electrical interference into the tachogenerator circuitry.
14. The 'Calc Velocity Gain' step can be run though again in RENICIS and any adjustment required made
using the 'MAX SPEED' potentiometer.
9
R
16
Figure 15 - Location of RT on the drive
Installing the SPA1
8
1
27
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