sjim Posted January 6, 2015 Posted January 6, 2015 I have an issue. At the moment I am trying to make an automatic pneumatic pump. The idea is to have a M-motordriving two 6L pumps. When the system, including a airtank, is full a small pneumatic cylinder press a powerfunctions switch to off. When the air runs out a rubber band pulls the cylinder back and the switch goes on again. The problem I have is that I can't seem to get the rubber band right. Usually it is too tight to allow the cylinder to extend or to loose to press it back again. Sometimes it is too tight and too loose at the same time. I may be losing my mind here, please save me. Quote
Zerobricks Posted January 6, 2015 Posted January 6, 2015 I had same problems. I noticed the oldeer 9V switch works much smoother than the new PF one so that may help? Or use a PF swith with a longer lever. Quote
Captainowie Posted January 7, 2015 Posted January 7, 2015 The PF switch has little plastic ridges in the throw arm to make it snap in to the extreme positions. That might be what's getting in your way. Quote
PKW Posted January 7, 2015 Posted January 7, 2015 I found really useful And fast a compressor with one RC motor And 2 pumps, But i've never tried To make An automatic compressor, are you sure that lots of slow pumps work better than some fast pumps? Anyway sariel posted some photos of his switch on Facebook (He use The small piston) but i think The bigger one could work better, if You have enough space Quote
sjim Posted January 8, 2015 Author Posted January 8, 2015 I updated the design to use a bigger arm to connect the to the trigger and now it work ok. Thank you all for your inputs! Quote
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