Delta RMC151 User Manual download pdf (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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Delta RMC151 User Manual Page 61