CAVRO XP 3000, Operator'S Manual, Page: 10 / 134

Getting Started
1-4
Syringe and Syringe Drive
The syringe plunger is moved within the syringe barrel by a rack and pinion drive that
incorporates a 1.8
°
stepper motor and quadrature encoder to detect lost steps.
The syringe drive has a 30 mm travel length and resolution of 3000 steps (3000 or 24000
steps for microstep-enabled firmware). When power is not applied to the pump, the
syringe drive can be moved by pushing up or down firmly on the plunger holder
assembly. This facilitates syringe removal.
The base of the syringe plunger is held to the drive by a knurled screw. The top of the
syringe barrel attaches to the pump valve by a 1/4-28" fitting.
Figure 1-2 shows the components of a typical syringe.
Figure 1-2. Syringe Components
Syringes are available in these sizes: 50
µ
L, 100
µ
L, 250
µ
L, 500 mL, 1.0 mL, 2.5 mL,
and 5.0 mL. For ordering information, see Appendix A, “Ordering Information.”