Delta RMC151 - Manual (Page 61)

2 Starting Up the RMC
• If the system vibrates while in position, the gains may be too high, or the Dead Band
value may need to be increased. However, if the oscillation is not caused by a
deadband in the system, adjusting the Dead Band value will not help! A rule of thumb
is to set the Dead Band Eliminator value to half of the peak-to-peak oscillation of the
drive output while in position.
• The final tuning of the system should be made at the speed of intended operation.
14. Save your Settings to Flash
To retain your settings in the RMC in the event of a power loss, you must save the
settings to Flash:
• On the Controller menu, click Update Flash.
2.3.7. Tuning a Pressure/Force System
The following procedure may be used to tune a pressure-only or force-only axis. For details on
setting up a pressure-only or force-only axis, see Controlling Only Pressure or Force.
If you are tuning a position-pressure or position-force axis, see the Tuning a Position-Pressure
or Position-Force System topic.
Please read the Tuning Overview topic before performing the tuning procedure.
There is no substitute for experience when tuning an axis. This procedure offers some
guidelines, tips, and suggestions for tuning your system. While these steps will work for some
systems, they may not be the best for a particular system.
Position/Pressure Tuning Procedure
Pre-Tuning Steps:
These steps come before actually tuning the gains.
1. Set the Pressure/Force Limits
Set the Positive Pressure/Force Limit and Negative Pressure/Force Limit. These specify
the pressure/force range in which the axis will be allowed to control. If the Target
Pressure/Force exceeds these values, an error bit will be set and will halt the axis if the
AutoStops are set to do so.
2. Set the AutoStops
Set the Pressure/Force Following Error AutoStop to Status Only to prevent following
errors from halting the axis during the tuning. After the tuning is complete, set the
AutoStops to values that are safe for machine operation.
3. Set Up the Tuning Tools
In the Tuning Tools, on the Pressure or Force tab, set up the command buttons so that
one button will ramp the pressure or force in one direction, and the other button will
ramp it in the other direction.
a. Click the down arrow on the command button .
b. Enter the Pressure/Force, and Ramp Time, then click OK.
Example:
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