Kirk is 100% correct, the o-rings need to be replaced once and a while.I would guess most didnt until something wouldnt work.It is a pain but if you only have to do it every 10 years or so it doesnt seem too bad. Like Kirk said make sure the stop prawl is what is stopping the turret it should fire before the motor stops trying to turn. Watch the turret come down.It should be perfectly smooth without any movement of rotation as it engages the locks at the seated position.This movement will be subtle and kind of hard to watch but if the locks are moving the turret when it comes down then you are not lined up and are putting undue wear on them. Terry ________________________________ From: Kirk Wallace <kwall...@wallacecompany.com> To: Terry Christophersen <tcninj...@yahoo.com>; Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> Sent: Saturday, April 21, 2012 12:17 PM Subject: Re: [Emc-users] Hardinge HCNC Retrofit/Rebuild
On Sat, 2012-04-21 at 09:17 -0700, Terry Christophersen wrote: > With dependable tool changes on a HNC. the stop latch (under the cover on the > operator side of the carrage) > is usually the thing to get right.Adjustments are made by removing the long > black cover on the right > side of the carrage.Under here there is a round plug with a hex socket,BUT > remember to loosen the > lock set screw that comes down from the top. > If the turret works once or twice correctly then your problem is more than > likely mechanical rather than > computer related. > A combination of the magnetic sensor and the stop cushion is more than likely > the issue. > What I do if I had to remove the sensor for some reason is try to get the > turret to work as > best as you can without the stop cushion(just to make sure the sensor is very > close to working) > then fine tune with the stop cushion. > It takes a little while but once you get the stop working correctly the > turret will be 100 percent reliable > > Terry On mine, I loosen the screw for the magnet then note the actual tool position. I rotate the magnet forward (I forget which way) until the tool number matches the actual position and continue until the number changes to 0 or the next tool number. I back off a little to get the proper tool number back again. This way the logic can make a match early enough to activate the stop pawl in time. If the match isn't done in time, the table continues to rotate. See here for the lock screw location: http://www.wallacecompany.com/cnc_lathe/HNC/maint_man/ In case you haven't heard me say it before, if your seals are over three years old they should be replaced (or at least checked that they are still soft and without cracks). It made a big difference on my lathe. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
