The only part, which could cause component misplacement on the rotary heads of the Siplace machine is the vacuum valve. I don�t know the official name in the part catalog, but I use to name it plunger. The plunger is moved in and out by a miniature stepper motor. The motor vendor refers to a Turbo stepper and indeed the motor is faster than a conventional solenoid. There are two different designs for the plunger. One made out aluminum with five O-rings and a plastic one with only one O-ring at the end. I�m not an O-ring fan, particular when you consider reliability. I definitely recommend the use of the plastic plungers. Unfortunately, the lifetime of this plastic part is limited and dependent on the air quality, should be replaced frequently. If the plunger is worn out, the vacuum on the nozzle decreases, as well as the airflow to release the component. Check the vacuum in the pick position. If you keep on having problems even with a new set of plastic plungers, check if you can narrow the problem down to one or two segments and replace the entire valve on these segments. If, by any chance, you got water into the air system, indicated by discolored mufflers, you will have to take the heads off the machine and clean them entirely.
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