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SMC ZSE30 Vacuum Sensor D292104.11.fm A-5 Appendix A: Sensors one is present, set the threshold closer to the pressure reading when no p art is on the nozzle. In this way , the optimum setti ng for each specific part can…
Appendix A: Sensors A-4
SMC ZSE30 Vacuum Sensor D292104.11.fm
SMC ZSE30 Vacuum Sensor
The SMC ZSE30 Vacuum Sensor functions as a Pick & Place Head part present sensor. It com-
pares the vacuum pressure at the pick and place nozzle to a threshold point.
When the vacuum pressure drops beneath this level the sensor sends an OFF signal to the
machine (the LCD display will be green). When the vacuum rises above the threshold, the sensor
sends an ON signal to the machine (the LCD screen will be red).
Adjusting the Vacuum Sensor
If the machine places “empty” pockets (i.e., places as though it held a part when it did not) or
returns a picking part error when it picked a part, the vacuum sensor’s threshold point probably
needs to be adjusted.
To adjust the threshold point, follow these instructions:
1. With no part on the nozzle and the vacuum ON, note the reading on the vacuum sensor.
Example: -60.5.
2. Press the Set button. The sensor will alternately flash n_1 and the current setting. This is
the threshold point.
3. Using the Up Arrow and Down Arrow buttons, adjust the value of n_1 to about 5 less
than the pressure reading that was noted with no part on the nozzle. Example: -60.5 - 5 =
-65.5.
4. Press the Set button again. The sensor will now display the h (hysteresis) setting. This
should read 0.0.
5. Press the Set button again to exit back to Normal Operation mode. Run the machine and
observe if the vacuum sensor is functioning properly.
6. If the machine places empty pockets, set the threshold point closer to the pressure read-
ing when a part is on the nozzle. If the machine fails to detect a part on the nozzle when
Pressure Reading Display
Set Button
Up Arrow Button
Down Arrow Button
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SMC ZSE30 Vacuum Sensor D292104.11.fm
A-5 Appendix A: Sensors
one is present, set the threshold closer to the pressure reading when no part is on the
nozzle. In this way, the optimum setting for each specific part can be reached.
Initial Factory Settings
If for some reason the sensor needs to be re-initialized to the default factory settings, follow the
steps below:
1. Press and hold the Set button for at least two seconds. The sensor will enter initialization
mode. The first setting to appear will be the Indication Unit setting. This should be set to
PA. Use the Up Arrows and Down Arrows to adjust this, if necessary.
2. Press the Set button to advance to the Display Color setting. This should be set to Sor
(Red/ON).
3. The next setting is the Operation mode setting. This should be set to HyS (hysteresis).
4. The next setting is the Output mode setting. This should be set to nC (normally closed). If
this setting is incorrect, the sensor will function backwards, such that the machine will not
detect a part when is on the nozzle and detect a part when no part is present.
5. The next setting is the Response Time setting. This should be set to 2.5.
6. The final setting is the Auto Preset setting. This should be set to mAn (manual).
7. Press the Set button to return to Normal Operation mode.
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