Poor Nozzle Vacuum

Poor Nozzle Vacuum

If you are having issues teaching a device or location and are seeing vacuum related errors then this guide could help.

In BPWin, there are some additional I/O and Sensor Diagnostics functions which should be used in this situation.

BPM autohandlers use a vaccum sensor to detect changes in air pressure through the pick and place nozzle. This change in vacuum level is how the system detects that a part has been picked.
These changes in vacuum level are converted to an electrical signal which is monitored by BPWin and presented in the Sensor Diagnostics window.

Poor vacuum at the nozzle will result in a smaller voltage swing, which is insuffecient for correct detection of a part on nozzle check.

Check the reading on the vacuum gauge on the pneumatics panel at the back of the handler, if it is it less than 20 in/Hg is sign a problem.
This could be a leak in the vacuum lines, a blocked vacuum line or a defective vacuum generator.

 

The vacuum generator needs to be checked to see if it is good.
Go up to the head and pull the vacuum hose off the curved metal tube that comes out of the Z rod. Using the I/O control switch on the vacuum and check the vacuum on the hose. If the vacuum is strong there, but weak at the nozzle, then the leak is inside the Z rod, probably the V-rings. If the vacuum is weak, the problem could be the in-line vacuum filter or the vacuum valve. Finally, there could be a split or cracked hose in the e-chain.

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