Hey everyone,
i have picked up a 1996 Jones and Shipman 540 surface grinder from an auction.
It powers up fine, and everything works except one thing...
The table feed only works in one direction, i have completely dismantled the valve, soaked it in degreaser for a day, blew every hole and gallery out with compressed air, i have removed the Y axis carriage from the ways and cleaned out every oil gallery.
there were 5 blockages in the valve, they formed where the valve split, and they looked like part of the gasket, cleaned and blew out all the spool centers - o rings were fine.
Put it all back together with confidence that it would work - due to removing 5 blockages.
Assembled it and it worked the exact same way it did before i cleaned it all out - cross feed works, table feed works one way only.
when i have the table feed valve in the position that i want it to go - i can push the cylinder freely both ways.
the ways lubricate fine with the adjustment screw down the center of the spool valve.
if i disconnect the ports from the cylinder and move the cylinder each way - oil flows out the each port depending on which way i push it.
if i cant get this working - i will re make a new block and use a CTOP valve to control the cylinder and put a stepper on the Y axis and just control the whole thing with an Arduino, i have exhausted all avenues and just CAN NOT FIGURE THIS OUT!!!
anyone got any ideas or have they gone through this before i go down the conversion route?
i have picked up a 1996 Jones and Shipman 540 surface grinder from an auction.
It powers up fine, and everything works except one thing...
The table feed only works in one direction, i have completely dismantled the valve, soaked it in degreaser for a day, blew every hole and gallery out with compressed air, i have removed the Y axis carriage from the ways and cleaned out every oil gallery.
there were 5 blockages in the valve, they formed where the valve split, and they looked like part of the gasket, cleaned and blew out all the spool centers - o rings were fine.
Put it all back together with confidence that it would work - due to removing 5 blockages.
Assembled it and it worked the exact same way it did before i cleaned it all out - cross feed works, table feed works one way only.
when i have the table feed valve in the position that i want it to go - i can push the cylinder freely both ways.
the ways lubricate fine with the adjustment screw down the center of the spool valve.
if i disconnect the ports from the cylinder and move the cylinder each way - oil flows out the each port depending on which way i push it.
if i cant get this working - i will re make a new block and use a CTOP valve to control the cylinder and put a stepper on the Y axis and just control the whole thing with an Arduino, i have exhausted all avenues and just CAN NOT FIGURE THIS OUT!!!
anyone got any ideas or have they gone through this before i go down the conversion route?