Operation and Maintenance Manual Rev M(ii) 4/03
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Appendix D – Open Loop Velocity Settings
Maximum Velocity settings
Due to the “open loop” nature of the stepper driven systems, we must set a maximum speed for each axis
that must not be exceeded. Unlike our “closed loop” servo systems which generate a position error if the
user attempts to run the motors faster than they are capable of moving, an “open loop” loop system will
simply lose position and keep going. The maximum speeds for each system are listed below:
Table 14 – PVA250™ Velocity Limits
PVA250™
Axis
Max User Speed
Max Burn in speed
Max Acceleration
Max Deceleration
X-Axis
60000 cnts/sec
66000 cnts/sec
300000 cnts/sec
2
300000
cnts/sec
2
Y-Axis
60000 cnts/sec
66000 cnts/sec
300000 cnts/sec
2
300000
cnts/sec
2
Z-Axis
6000 cnts/sec
6500 cnts/sec
30000 cnts/sec
2
30000
cnts/sec
2
Table 15 – PVA750™, PVA2000C™ Velocity Limits
PVA750™, PVA2000C™
Axis
Max User Speed
Max Burn in speed
Max Acceleration
Max Deceleration
X-Axis
125000 cnts/sec
134000 cnts/sec
500000 cnts/sec
2
500000
cnts/sec
2
Y-Axis
125000 cnts/sec
134000 cnts/sec
500000 cnts/sec
2
500000
cnts/sec
2
Z-Axis
6000 cnts/sec
6500 cnts/sec
50000 cnts/sec
2
50000
cnts/sec
2
Summary of Contents for PVA2000
Page 9: ...Notes ...