LINK Systems OmniLink 5000 - Manual (Page 104)

7.12
2457 6.00
2252 5.50
2048 5.00
1843 4.50
1638 4.00
1433 3.50
1229 3.00
1024 2.50
0819 2.00
0614 1.50
0410 1.00
0205 0.50
0000 0.00
Step 3. Once stroking at high speed with a full scale command signal, the spm input can be calibrated by
adjusting the gain pot on the front of the R/D Module. The spm input will be displayed as Drive
Speed on the operator terminal.
Step 4. The calibration number can then be adjusted until the press is stroking at the programmed Low
Output Spm and the Cal. # programmed into the Low Output Cal. # parameter. The analog
output should now be calibrated to function linearly from the low spm to the high spm. For
example,
at 10.00 vdc (cal # 4095) the high speed was 400 spm
at 2.00 vdc (cal # 0819) the low speed was 50 spm
Mid spm is not used and both parameters set at 000.
If you exit the machine speeds screen to exit calibration mode and then enter a continuous
speed setting of 225 (mid speed), the analog output will be 6.00 vdc.
Typically dc and variable frequency drives exhibit linear characteristics and it is not
necessary to set a mid range parameter. However, eddy current drives can exhibit
nonlinear behavior. To verify this, enter a cal. # of 2457 (4095+819)/2. If the press does
not run at 225 spm the Mid Output Spm and Cal. # can be used to linearize the
characteristics of the drive.
Step 5. If the Drive Speed readout does not match the Stroke Speed at Low speed, the Low Spm Input
Offset parameter can be used to provide a zero adjustment. Enter an offset value that causes the
spm to indicate correctly.
Step 6. Motor current can be calibrated by adjusting the % Load pot on the front of the R/D Module (200
% maximum reading).
Section 7.3.1 Calibrating Flywheel Speed Display
If the motor speed adjustment option is not used, the press control can still be configured to provide the
Drive Speed readout only. The suggested procedure for calibrating the display is as follows:
Step 1. Set the Maximum Strokes/minute parameter slightly above the actual highest stroking speed of the
press.
Step 2. Set the Low Spm Input Offset parameter to 000.
Step 3. Run the press at full speed and adjust the gain potentiometer until the Drive Speed reads correctly.