ETS-Lindgren 2181 Turntable - Manual (Page 29)

Operation | 29
T URNTABLE C ALIBRATION E XAMPLE
• The turntable is set at the 0 degree position. A piece of tape is placed on the
edge of the turntable to line up with the edge of the gearbox cover. The
turntable is stopped when the tape travels exactly 360 degrees around. The
display on the controller now reads 356.3 degrees, which is recorded.
• The table is rotated CCW back to zero. The parameter button is set on the
C setting. The C digits display 3430. A new C setting is now calculated:
New C = (356.3 / 360) x 3430 = 3395 (rounded)
• Decrement
the C parameter to 3395 and press ENTER. Press the
current position button to get back to operation mode.
• The table is rotated from 0 to 360 and the mark is now within one degree of
being one full turntable revolution. Calibration is complete.
Changing Rotation Speed
The Model 2181 is equipped with a variable speed drive. Firmware revision 3.11
or higher must be installed in the Model 2090 controller for proper operation of
the Model 2181. The revision level is displayed on the front panel display during
startup of the Model 2090 controller. If the controller does not have this revision
or a later revision installed, contact ETS-Lindgren for an upgrade.
To select one of the four speeds, use the POLAR/SPEED button to toggle
through the speed options. It is necessary to set the controller parameters to
configure the controller to properly control the motor base. See the
Model 2090 Series Multi-Device Controller Manual for information on setting the
parameters.
Variable Speed Settings
The Model 2090 controller parameters
S1-S8 control the variable speed settings
for the turntable. These parameters are the continuous variable speed settings
for each of the four speed selections described in the next section,
Speed Selection. Each of these parameters can be set to any value from 1 to
255, with the resulting turntable speed being roughly an S/255 fraction of the
maximum speed. For any variable speed drive, there is a minimum speed at
which the motor will operate. For the Model 2181 this minimum speed setting is
between 30 and 75, and should correspond to a value of 0.5 RPM or less. Below
this setting, the motor will not be able to cause rotation, but will be active until a
Motor Not Moving error (E002) occurs.