CAVRO XP 3000 - Plunger Time Calculations; Symbol Definitions

Plunger Information B-2
Plunger Time Calculations
Following are calculations for determining XP 3000 plunger speeds. Four different cases
are presented below.
1 Start, top, and cutoff velocities are equal, or top velocity is less than 50 Hz.
2 Typical move with ramp up, constant speed and ramp down.
3 Move is too small to reach cutoff velocity.
4 Move is too small to reach top velocity.
Symbol Definitions
Table B-1. Symbol Defintions
Symbol Name Range (n) Unit
v Start Velocity 50..1000 Half Steps/sec or Hz
V Top Velocity 5..5800 Half Steps/sec or Hz
c Cutoff Velocity 50..2700 Half Steps/sec or Hz
L Slope 1..20 n*2500 Half Steps/sec²
or Hz
A Move Distance 0..3000 Full Steps
t
¹
Ramp Up Time Seconds
t
²
Constant Speed Time Seconds
t
³
Ramp Down Time Seconds
tTotal Move Timet
¹
+t
²
+t
³
Seconds
A
¹
Ramp Up Steps Half Steps
A
²
Ramp Up Steps Half Steps
A
³
Ramp Up Steps Half Steps
NOTE Cutoff velocity cannot be smaller than start velocity.
During aspiration, v is used in place of c.
The XP 3000 uses 3000 full steps per stroke.