Success!

Thanks to second handed electric parts, semiconductor as rectifier and capacitor as smoother, our laboratory vacuum system works far better than before with industrial hi-powered one.
Especially unendurable polluting noise and vibration have remarkably eliminated like nothing in spite of increased suction power at vacuum tip end if used several ones simultaneously.
Vacuum motor power does not always dictate that of suction one, but apparently exists the intake conduit that meets the resistance, so adequate adjustment of the inhaled dose is the critical requirement to establish the ideal vacuum system for medical professional use.
As for our system, the adjustment of motor power in family use vacuum cleaner utilizing voltage adjuster is remained, now vacuum power is adjusted by making some bypass hole on the air way near to the motor. The dust sign indicator on the cleaner body would be good gauge to set the adequate adjustment, if it might be done either bypass air method or voltage reduction one.
The fortune telling for today is scored only 52, I've succeeded in the trial if there were surely mistakes to brake some fuse protectors.