Andy Pugh wrote: > On 29 April 2010 15:19, yann jautard <[email protected]> wrote: > > >> In fact, the part of the valve thay closes it is acting like a piston >> that pushes out the glue. >> > > A rotary valve (either a plug valve or a ball valve) should counteract > this problem. > http://en.wikipedia.org/wiki/Ball_valve > > You're rigth, but not easy to drive with a pneumatic cylinder.
And no suction when closing. I'm thinking in making something like a 2-2 spool valve, with one end of the sheath connected to the output, so when the drawer goes back to close the flow, it acts like a piston to produce the suction required to cleanly shut off the flow. (Well I'm not sure this is understandable, I used some word-to-word google translation from the french technical terms...maybe better if I draw something) And the exact inverse at the opening : the drawer pushes some glue to have a good start of the flow. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
