92 Mits DWC110-SZ
Set up a part today, located it in and went about the job. Finished it up and setup for the next (repeat part), but when I went to locate the edges I got all sorts of weird things... Seemed like the ability of the machine to pick up the continuity varied widely. Edge find once and set zero, double check and was off by .010" or more... Then again, and .005 the other way. Again, and after it got 0.1" (yes decimal in right place) where the first zero was set, I just stopped it and could feel the wire was pulled off and around the part. (locating in X on a dowel pin and in Y to the square edge of block). Sometimes it would act normal (bumb into material, back up a thou or so and then feed in in .0001 increments, and then in "normal time" yould see the contact and it would stop like yould think. Other times, it would move in at fast feed rate, contact, back out, but only .0005 or so, and never loose contact, and immediately go to "Pos END" and would be notably off. Other times, it would bump it, back off, and slow feed back but just kept feeding in, never showing contact.
I cleaned everything, looking for debris, oil, something... anything... and nada. Took some scotchbrite to surfaces to be sure. No difference. Would just fart around. Then once in a while, Id get it to act normal again. Grabbed ohmmeter, checked continuity from part to table, pin to part, pin to table, and all was very low and within .1 ohm of each other.(using 200 ohm scale). I turned off the wire feed and ran the ohmmeter between the wire and the part, and got continuity where Id expect, but with out the wire feed on, the contact light doesnt operate.
Im guessing that its either a connection where the control reads continuity from the wire and or the table or maybe a card of some nature is going bad? The machine burns just fine (granted Im only doing roughing/single pass cuts so I cant say what it would be like trying to run a skim or three. But no odd wire breaks or issues with finish - its just the edge finding.
I have it running now, as I can get it zeroed out accurately enough for what Im doing now with taking a bit extra time and piddle farting. But I have a couple things to do later today and tomorrow that I would really like to have things acting right (will have to find center on small hole and cant get to the wire to tinker with things.
Any suggestions where the control reads its continuity from the wire and table so that I can check those connections? Or maybe this is a common issue and Im just not thinking about things right and missing the answer? I figured best to start researching now while she is burning.... Thoughts? Ideas? Suggestions for further testing?
Always something to deal with or learn... :confused:
Thanks
Wade
Set up a part today, located it in and went about the job. Finished it up and setup for the next (repeat part), but when I went to locate the edges I got all sorts of weird things... Seemed like the ability of the machine to pick up the continuity varied widely. Edge find once and set zero, double check and was off by .010" or more... Then again, and .005 the other way. Again, and after it got 0.1" (yes decimal in right place) where the first zero was set, I just stopped it and could feel the wire was pulled off and around the part. (locating in X on a dowel pin and in Y to the square edge of block). Sometimes it would act normal (bumb into material, back up a thou or so and then feed in in .0001 increments, and then in "normal time" yould see the contact and it would stop like yould think. Other times, it would move in at fast feed rate, contact, back out, but only .0005 or so, and never loose contact, and immediately go to "Pos END" and would be notably off. Other times, it would bump it, back off, and slow feed back but just kept feeding in, never showing contact.
I cleaned everything, looking for debris, oil, something... anything... and nada. Took some scotchbrite to surfaces to be sure. No difference. Would just fart around. Then once in a while, Id get it to act normal again. Grabbed ohmmeter, checked continuity from part to table, pin to part, pin to table, and all was very low and within .1 ohm of each other.(using 200 ohm scale). I turned off the wire feed and ran the ohmmeter between the wire and the part, and got continuity where Id expect, but with out the wire feed on, the contact light doesnt operate.
Im guessing that its either a connection where the control reads continuity from the wire and or the table or maybe a card of some nature is going bad? The machine burns just fine (granted Im only doing roughing/single pass cuts so I cant say what it would be like trying to run a skim or three. But no odd wire breaks or issues with finish - its just the edge finding.
I have it running now, as I can get it zeroed out accurately enough for what Im doing now with taking a bit extra time and piddle farting. But I have a couple things to do later today and tomorrow that I would really like to have things acting right (will have to find center on small hole and cant get to the wire to tinker with things.
Any suggestions where the control reads its continuity from the wire and table so that I can check those connections? Or maybe this is a common issue and Im just not thinking about things right and missing the answer? I figured best to start researching now while she is burning.... Thoughts? Ideas? Suggestions for further testing?
Always something to deal with or learn... :confused:
Thanks
Wade