Specifications

Chapter 1. Installation 29
Configuring Electronic Viscosity (EV)
Before You Start
• If you configured active damping (see procedure above), leave the DACTDP setting set at the
value you chose. You do not need to disable active damping while you configure EV.
• Couple the motor to the load (see pages 24-25 for details). EV must be configured
under the normal mechanical operating conditions for your application.
• Record the DELVIS command setting. The procedure below helps you identify the
appropriate set-up command (DELVIS) that will prepare your system for optimized
performance. DELVIS is not saved in non-volatile memory. Therefore, you should write down
this command as you qualify it in this procedure, then place it in a program. Page 31 shows
an example of how to place DELVIS in a set-up (STARTP) program (a set-up program executes
user-specified commands that establish power-up operational defaults for your application).
Step 1
Verify correct motor-to-ZETA6104 matching. See Matching the Motor to the
ZETA6104 on page 22. To be fully effective, the active damping circuit requires proper
matching. If you are replacing a component (new ZETA6104 or motor) in an existing
application, you must rematch your system.
Step 2
Make a baseline move with EV disabled. This is your baseline move. Notice the
sound, amount of motor vibration, perceptible ringing, etc. This move shows how your
system operates with EV disabled. Each time you adjust the DELVIS setting (in steps 3 & 4),
you will compare results against this baseline move.
1. Issue the DELVISØ command to disable active damping.
2. Make a move that is representative of your application, with similar velocity and
acceleration. The velocity must 3 rps or less, in order for the ZETA6104 to activate EV.
WARNING
Make sure that causing motion will not damage equipment or injure personnel.
The following commands illustrate a simple incremental point-to-point move:
MCØ (select the preset positioning mode)
MAØ (select the incremental preset positioning mode)
A1Ø (set the acceleration to 10 rps
2
)
V2 (set the velocity to 2 rps)
D25ØØØØ (set the distance to 250,000 steps, equal to 10 revs)
GO (initiate the move)
NOTE: To stop a move in progress, issue the !S command.
To repeat the move, issue the GO command.
To reverse direction, issue the D~ command and the GO command.
Step 3
Make a move with EV enabled. Compare the results with the baseline move.
1. Issue the DELVIS1 command to enable EV.
2. Make a move that is representative of your application. Use the same motion
parameters that you set up in step 1. If you have not changed these settings, simply
issue the GO command.
Step 4
Find the ideal EV setting. Continue to increase the DELVIS setting by single
increments (the maximum setting is DELVIS7), and executing a move. Repeat this step
until you find the setting that gives the best performance. You can try all seven settings.
Incorrect settings will not cause damage.
During a repetitive move, you can change the setting “on the fly” (while the move is in
progress) if you precede the DELVIS command with a “!” (e.g., !DELVIS2). This allows
you to immediately compare two different settings.