Steelies Posted June 13, 2012 Share Posted June 13, 2012 no thats not our mill anyone familiar with Fagor CNC control magic boxery? heres a story: our mill was brand new our mill was 'delivered' by NZ Cranes. our mill was dropped in the middle of the driveway in the pouring rain by NZ Cranes craned back upright, jammed in the workshop to get it off the driveway. naturally nobody knew who was liable for the incident, turns out it seemed to happen in a bermuda triangle of insurance where NZ Cranes cover came to a grand total of $1500. shit got crazy and it all washed over resulting in us with a mill that we had to get running so it wasnt just a giant letterbox for the workshop. the casing was fucked, took us a wee while to get it fixed, installed and comissioned. we did some saweet work on it for 6 months or so, it was cranking. sciency stuff never got to anything cool like bike sprockets. all in good time. ****************** then, magically something changed. (this is about a year ago now, finally got a spare moment to look in to it now) it started making the odd crazy move, sporadically. make its last cut then rapid movement in some direction and break our nice shiny tools off/destroy job. parameter/setting change? we did no such. we were producing 50-odd of the same simple job over a few weeks, at about number 30 or so it busted out this new move, tool and job bit the dust. check program, reset, restart, ran fine. bam! b-boy crazy legs again. at this point we got scared.. checked everything again, reset etc, but shit was funky.. home search - Z is the first axis to home, it heads straight down rather than home which is up. WTF? do it again, machine homes fine and dandy. WTF? do again. funky Z comes back. too much to deal with, shutdown. now the problem is consistent, Z is moving in the wrong direction. just before you say anything - yes, NZ Cranes should sort it out, yes it's been left too long, no NZ Cranes wont come to the party, yes insurance should have been better sorted out, it's far too late to worry about that jazz so i just want to fix the problem. ****************** so Z is homing the wrong way. i changed the homing direction parameter on Z to see if it'd be happy. homes upwards now, but runs straight past home position and hits the limit switch. i think i missed a step after changing the parameter to reset a zero point but at least it was a step in the right direction (pun) aside from the home position issue this Z direction business is dumb. damaged servo drive magic from being dropped? will set parameters back to standard this avo so, obviously i dont know enough about all this and thus will probably be the worst person to mess around with settings and parameters. unlucky. any ideas you pros out there? Quote Link to comment Share on other sites More sharing options...
KKtrips Posted June 13, 2012 Share Posted June 13, 2012 Ask Sheepers - I believe he is a CNC/magnets guru.. Quote Link to comment Share on other sites More sharing options...
Steelies Posted June 13, 2012 Author Share Posted June 13, 2012 bril, chur. also, if i manually put Z to home going by numbers the 'home' light says it's happy. one light for each axis. Quote Link to comment Share on other sites More sharing options...
mikuni Posted June 13, 2012 Share Posted June 13, 2012 restore to factory default settings/firmware upgrade/turn off at the wall and count to ten? the fact that it worked fine for 6 Months is promising of finding a solution to the problem Quote Link to comment Share on other sites More sharing options...
Steelies Posted June 13, 2012 Author Share Posted June 13, 2012 oh yeah plenty of turning off at walling! as confirmed with grand wizard sheepers evidence points away from software and to a mechanical fault, with an encoder or some such. Quote Link to comment Share on other sites More sharing options...
Stu Posted June 13, 2012 Share Posted June 13, 2012 We've had to replace one of the servo packs due to a similar issues with Z axis on flat bed router. Quote Link to comment Share on other sites More sharing options...
Steelies Posted June 13, 2012 Author Share Posted June 13, 2012 oh cool good to know, the whole servo unit you mean? Quote Link to comment Share on other sites More sharing options...
UTERUS Posted June 14, 2012 Share Posted June 14, 2012 Had a similar issue with a mazak yeeeaaars ago. It was a dirty sensor. Quote Link to comment Share on other sites More sharing options...
drftnmaz Posted June 14, 2012 Share Posted June 14, 2012 i'd say corrosion inside the servo, or wires to it, or where it attached to circuit board in main controller, start inspecting that part of the system... **im no expert but spent many years fixing machines i shouldn't be touching Quote Link to comment Share on other sites More sharing options...
Steelies Posted June 14, 2012 Author Share Posted June 14, 2012 Quote Link to comment Share on other sites More sharing options...
Testament Posted June 14, 2012 Share Posted June 14, 2012 ^ all sorted then????? Quote Link to comment Share on other sites More sharing options...
Steelies Posted June 14, 2012 Author Share Posted June 14, 2012 hah if only. gona check some schematics and next free time start getting in there to check spots mentioned above. cheers guys Quote Link to comment Share on other sites More sharing options...
Testament Posted June 14, 2012 Share Posted June 14, 2012 next free time? - you have 32 minutes and counting my man! Quote Link to comment Share on other sites More sharing options...
Stu Posted June 14, 2012 Share Posted June 14, 2012 Yeah swapped out the whole servo pack in the control cabinet. We had major issues in the height of summer with the temperature in the control cabinet too. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted June 14, 2012 Share Posted June 14, 2012 Surely the producer of this equipment is able to offer some advice? Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted June 14, 2012 Share Posted June 14, 2012 Haha, yeah "yeah mate , shes fucked" Quote Link to comment Share on other sites More sharing options...
Steelies Posted June 14, 2012 Author Share Posted June 14, 2012 mor like 'yeah mate, chuck us a couple grand and we'll fire a 100yr old tech your way to fumble about in there' Quote Link to comment Share on other sites More sharing options...
Steelies Posted June 18, 2012 Author Share Posted June 18, 2012 had a geez at the encoder, seems ok. should be able to get it tested here at work. moved on to the Z-axis switches, which i should have already looked at, kinda obvious. only one of the two plungers made a clicky sound when puched by hand, so off comes the unit and the back cover.. i wonder if this could be part of the problem? unit was completely sealed, except for the cable shroud in the top i guess. seems like more crap in there than we could have put in, as the machines been used so little. stoked though, kinda like finding that missing vacuum line on an engine that wont behave. Quote Link to comment Share on other sites More sharing options...
KKtrips Posted June 18, 2012 Share Posted June 18, 2012 Nice detective work Detective Blakiston. Now for your next assignment you need to find Carmen Sandiego.. Quote Link to comment Share on other sites More sharing options...
Stu Posted June 18, 2012 Share Posted June 18, 2012 I used to love that game Quote Link to comment Share on other sites More sharing options...
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