i dont have an emc solution i dont have a solution specific to your machine but we used a system and a plc that may be an idea
(we integrated a load of toolchangers from different companies to Heidenhain and Fanuc controls) 1st we used a pressure sensor for the entire system, we didnt attempt tool change if pressure was low this idea can be used on the line where """the electrovalve keeps blowing until I turn off """ valves can be used to isolate the line in question and test for backpressure and for the good/bad clamp issue we had a solenoid with a line and another pressure sensor it fed a tiny hole on the clamping surface IF the tool seated well, it would stop air flow after a short ( 100mS ) time , pressure would rise IF the tool was NOTSEATED the code could try again a few times before aborting and signalling, pressure would NOT rise IF the tool was NOT UNCLAMPED we could also try to re-release in the PLC by using 'backpressure' we could evaluate the seating/releasing of the tool HTH tom tjtr33 On 11/25/16 02:28, Leonardo Marsaglia wrote: > Hello to all. > > I have a little problem (I hope it's a little one) with the claping on the > turret of the Mazak QT20. > > The clamping works with a hydropneumatic system and by looking at it, it > has some amplificators of force on the back of the charriot. > > The problem is, the turret won't unclamp sometimes, and if it does it takes > a little while. Then when it clamps again sometimes I can see it's not a > soft and natural clamping. We checked and replaced the o-rings on the > turrent side, and I checked the electrovalves on the back. The valves > seemed to be a little sticky on the return stroke but I cleaned and > lubricate them and by hand the worked ok. I don't know if that could cause > the erratic problem. > > Another thing that happens when the turret doesn't want to unclamp, is that > the air relief on the electrovalve keeps blowing until I turn off the > machine or until I press the clamp button again. (When this happens the > turret doesn't even want to unclamp). > > I can't find any docs about the circuit, and I don't have schematics about > the hydropneumatic circuit on the manuals I have. So I came to the only > place I know I will have the best answers :) > > Thank as always! > > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
