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piston issue

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: jon_89 » Tue Jul 31, 2007 8:03 pm

it is half inch copper not pvc. a 3/4 inch cap will fit in one inch pipe correct?
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Unread postAuthor: mopherman » Tue Jul 31, 2007 8:23 pm

chaos wrote:
mopherman wrote:
jon_89 wrote: it moves back about an inch if that.

Well hell! theres your problem. it should move 1/8 -1/4 of an inch for a1/2 barrel


yer so make your piston a bit snugglier with the housing (use electrical tape, duct tape tends to grab), put some washers or a spacer of some kind behind the piston to stop it moving so far back.

chaos, how did you o-ring your piston? i dont think you could put a groove in a washer piston like yours?
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Unread postAuthor: chaos » Wed Aug 01, 2007 6:16 pm

mopherman wrote:
chaos wrote:
mopherman wrote:
jon_89 wrote: it moves back about an inch if that.

Well hell! theres your problem. it should move 1/8 -1/4 of an inch for a1/2 barrel


yer so make your piston a bit snugglier with the housing (use electrical tape, duct tape tends to grab), put some washers or a spacer of some kind behind the piston to stop it moving so far back.

chaos, how did you o-ring your piston? i dont think you could put a groove in a washer piston like yours?


haha, yer..... lets not go there, that piston still gives me sh_t from time to time. when i pull it apart next ill disassemble it and show you guys how it works, oh and i wouldnt copy mine caus its really a piece of crap, im making a new one soon so yer ill keep yous updated
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Unread postAuthor: mopherman » Wed Aug 01, 2007 9:50 pm

chaos wrote:
mopherman wrote:
chaos wrote:
mopherman wrote:
jon_89 wrote: it moves back about an inch if that.

Well hell! theres your problem. it should move 1/8 -1/4 of an inch for a1/2 barrel


yer so make your piston a bit snugglier with the housing (use electrical tape, duct tape tends to grab), put some washers or a spacer of some kind behind the piston to stop it moving so far back.

chaos, how did you o-ring your piston? i dont think you could put a groove in a washer piston like yours?


haha, yer..... lets not go there, that piston still gives me sh_t from time to time. when i pull it apart next ill disassemble it and show you guys how it works, oh and i wouldnt copy mine caus its really a piece of crap, im making a new one soon so yer ill keep yous updated

does it use rubber washers like the SSS or o-rings?
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Unread postAuthor: chaos » Wed Aug 01, 2007 11:17 pm

mopherman wrote:
chaos wrote:
mopherman wrote:
chaos wrote:
mopherman wrote:
jon_89 wrote: it moves back about an inch if that.

Well hell! theres your problem. it should move 1/8 -1/4 of an inch for a1/2 barrel


yer so make your piston a bit snugglier with the housing (use electrical tape, duct tape tends to grab), put some washers or a spacer of some kind behind the piston to stop it moving so far back.

chaos, how did you o-ring your piston? i dont think you could put a groove in a washer piston like yours?


haha, yer..... lets not go there, that piston still gives me sh_t from time to time. when i pull it apart next ill disassemble it and show you guys how it works, oh and i wouldnt copy mine caus its really a piece of crap, im making a new one soon so yer ill keep yous updated

does it use rubber washers like the SSS or o-rings?


yer it uses rubber disks about 8mm thick, it does the exatct same jobs as o-rings do, it was all i really had to work with at the time and i still dont have time to lathe a new one up.
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