TriContinent C24000, Руководство по эксплуатации продукта

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Plunger movements
63
C-Series Product Manual
Controlling plunger moves with configuration commands
Configuration commands are used to set up the pump for specific opera-
tions. These include settings for plunger velocity, acceleration, backlash, and
auxiliary outputs.
Velocity and acceleration configuration commands
Velocity and acceleration configuration commands are used to control the
motion of the plunger. Plunger movement is structured into three phases:
• Ramping up. Plunger movement begins at the start velocity and accelerates
with the programmed slope [L] to the constant or top speed.
• Constant or top speed. The plunger moves at the constant or top speed.
Plunger speed or velocity can be programmed in increments/sec or in preset
speeds [S]. The actual time the plunger travels depends on the ramping up
and down. If the plunger move is short, it may never reach top speed.
• Ramping down. The plunger will decelerate based on the programmed
deceleration slope [L]. To enhance fluid break-off, the Cutoff command [c]
can be used to define the end velocity of the plunger just before it stops.
For each plunger move, the firmware calculates how many increments the
plunger must travel during each phase in order to move the total number of
increments commanded.
The top velocity can be changed on the fly (while the plunger is moving)
using the [V] command. When the move completes, the speed value reverts
back to its original values.
In the N0 and N1 increment modes, velocity and acceleration settings are
configured and reported in increments/sec. In the high resolution increment
mode (N2), they are set up and reported in micro-increments, which provide
8X the resolution as the N0 mode.
Difference between C24000/C24000MP and C3000/C3000MP
velocity settings
Since the C24000 and C24000MP have a 4 times finer lead screw pitch than
the C3000/C3000MP, the linear velocity is 1/4 as fast for a given velocity
setting.
Thus, to aspirate/dispense at the same rate, the Top Velocity command [V]
needs to be multiplied by 4 for the C24000/C24000MP. For example
[V1000] in the C3000/C3000MP is equivalent to [V4000] in the C24000/
C24000MP.
The same relationship applies to other velocity and acceleration commands.