CellScale BioTester User Manual page 25

Velocity (1-10 integer values) matches actuator jog speed. Typically for harder tissues, this
value should be between 4 and 6 and for soft tissues, this value should be between 6 and 10.
Acceleration (1-10 integer values). Typically this should be set to the default value of 10
(maximum acceleration). Changes made to the acceleration will affect tests under both force
and displacement control. Reducing this value may help smooth force controlled tests under
low loads or displacement controlled tests at high speeds. Tests run with lower accelerations
will have softer transitions at direction or speed changes but may take longer than specified
to achieve testing cycles.
BioTester Tip: Testing Force Control Settings
It is important to have appropriate Force Control Settings that match the materials you
are testing.
To safely test Force Control Settings: press
the tool bar, or from the Tools menu select Move
Actuators to Specified Load. The dialogue shown on
the right will appear. The BioTester will attempt to
achieve the specified loads (forces) but will stop
when either the specified loads are reached, the
actuators have displaced by the maximum specified
amount, or the timeout time has elapsed.
If the actuators oscillate around the specified loads
but never achieve them try reducing Kx and Ky,
and/or decreasing the velocity.
If the actuators reach the specified loads too slowly,
try increasing Kx and Ky, and/or increasing the
velocity.
Reset Actuators
Resetting the actuators with a sample attached may damage the specimen, BioRakes, and/or
load cells. To avoid resetting the actuators with a sample attached, a warning dialogue will
appear after "Reset Actuators" is selected, prompting the user to proceed. This feature can
be disabled by de-selecting "Show Warning Before Resetting Actuators".
BioTester User Manual
on
20