How to Replace Backflow Sensors
The Backflow sensor pair is the first line of defense against abrasive backflows. They are made in anti-static plastic and would wear down after extended usage. Once worn down, they may be cracked and cause vacuum leak into the abrasive hose. This will result in a failed cut. Thus it is recommended to proactively replace them after 300 hours of operation.
Required Tools
PPE (gloves, masks and eye goggles)
Spare Parts Needed
Spare Backflow Sensors
Included in the Spare Parts Kit inside the black tool case.
Procedure
1. Pull out the Abrasive Hopper from the left of the WAZER Pro
2. Trace the Abrasive Hose. Locate the two backflow sensors on the abrasive hose.
3. The first backflow sensor is to bleed off the static generated by abrasive particles, while the 2nd backflow sensor is there to detect moisture in the abrasive hose.
4. After locating the two backflow sensors in the abrasive hose, trace their leads to their respective connectors.
5. The first sensor (static bleeding sensor) is connected to a cable (static bleeding cable) that terminated on one of the cut bed posts. Do not remove the loop connectors from the cut bed posts, it will result in a leak
6. Remove the JST connectors that connect the backflow sensor to the static bleed cable.
7. Remove the first sensor (static bleed sensor) from the abrasive hose. The backflow sensor is hooked onto the abrasive hose through barbs. It may take some effort to remove the backflow sensor.
8. Reattach the new sensor. Connect the new sensor to the static bleeding cable.
9. Repeat the procedure above for the 2nd backflow sensor (firmware sensor). This is the sensor that detects a rise in moisture level in the abrasive hose and pauses the cut.
10. After the sensor pair is replaced, conduct several quick checks to ensure the function of the backflow sensors:
11. Go to “setup and maintenance” > “input and output” > “input” > “service sensor”, check the UI screen’s prompt is “Joint Two Pins”
12. Conduct a quick abrasive hose suction check, ensure the suction felt on the hopper end of the abrasive hose is strong and consistent.
13. Conduct a quick backflow sensor function check according to the instructions. This is the ultimate check to tell if the new sensor pair is installed correctly.
14. If the abrasive hose is torn during the sensor replacement process, replace the entire abrasive hose.
Related Topics
Backflow sensor function check
Replace the abrasive hose with backflow sensors.
Next Time
Backflow sensor is made of plastic. Even though WAZER will carry on improving the durability of this sensor, it is inevitable to see abrasive wear out the sensor after extended operation. Pay close attention to abrasive flow and check for the integrity of the backflow sensor regularly will prevent any abrasive issues from happening.