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  1. edexlab

    Overload issue

    It was just to keep them going but also I think its shown that the motor may be ok I have 2 new overloads fitted spaced all of them so there is an air gap , set it slightly below rated current, and in manual reset Part of the problem is the overloads were set to auto reset and when they...
  2. edexlab

    Overload issue

    Also when the overload failed there were no spares, so as a test ran it directly off the relay for a few hours until got a replacement, monitored the current / voltage to see if the motor was behaving and not seen anything strange, so to me it points back to the overloads again,
  3. edexlab

    Overload issue

    Agree 100% and have been constantly checking things for 2 days , not seen anything unusual at all As I said before after all checks the Overloads that have tripped have done so when it's set at just over 1 A, I've had clampmeters on and watched and it's never gone above the running current...
  4. edexlab

    Overload issue

    Yes checked switching ratings of contactors These are standard components for this firm As said before this company builds big and complex systems usually longer than this a
  5. edexlab

    Overload issue

    I'm thinking it's a straightforward thing Replace hot and heat damaged overloads as one has already failed Change PLC program to give a longer delay to ensure there aren't too many boxes on conveyor at any time and then monitor temperature in the panel and motors to see if the heat is a...
  6. edexlab

    Overload issue

    400v 3~ Checked gearboxes, listened to them ,temps and turned all by hand nothing except for a very slight leak of oil on one gearbox Maintenance team not experienced electrically, they try their best I think.... As I said the contactor switching rapidly when there is a build up of boxes...
  7. edexlab

    Overload issue

    I'm looking at a German made roller conveyor system 10 motors contactors controlled by a PLC Issue is customer says 3 mths ago motors started stopping and overheating, and would then start again when cooled down Overloads trip out PLC, input switches contactors off and someone presses reset...
  8. edexlab

    Motor VSD problem

    Possibly but He's a switched on guy so I wouldn't have thought so, I've already emailed him to ask ....
  9. edexlab

    Motor VSD problem

    It's a Lenze i550
  10. edexlab

    Motor VSD problem

    The original motor is ok I tested it on the bench, no burnt varnish smell then connected it runs well, gearbox fine, only reason I didn't put it back on the machine was because I'd been told not to I'd normally think that someone messed up with the max current parameter or some other...
  11. edexlab

    Motor VSD problem

    Evening all Had a problem this week which has puzzled me a bit Installed a machine last week which has 2 sides to it both doing the same operation It ran perfectly for 19 hrs and then one side stopped working I was away from the site and the maintenance guy called me so I got him to open the...
  12. edexlab

    Don’t let your kid help stripping scrap cables

    When I was 4 our Mum used to give us a sharp knife to help chop carrots for tea under supervision of course with the warning be careful with it you'll cut yourself and it will hurt! I've heard its long been common practice in some countries like Sweden All my family did it , we all got...
  13. edexlab

    Best tool for cutting conduit?

    Always used hacksaw myself but if it's for other things I'd be Plus one for bandsaw simply because you don't need hot works permits Been on sites which have a cut off time and also no permits issued on a weekend Quite annoying having to wait until Monday to do a cut
  14. edexlab

    DIN cable connection tool

    Tried that didn't go well! 1579380218 Think I'm going to try a low tech version of a box spanner with one side cut off I have a cheap one I'll butcher first Also I'm going to get a couple of cheap 12 point crowsfoot spanner 8mm 12mm 16mm and a 3/8 " drive screwdriver and see how they work...
  15. edexlab

    DIN cable connection tool

    The driver is Wera rebadged as Phoenix contact and slightly different colour I have looked at Wera tools they have the driver but I haven't seen the teardrop cam that goes with it ( interchangeable two sizes)
  16. edexlab

    DIN cable connection tool

    Design is ok i do have one but I don't think they are small enough , connector sizes we use are M8 to M12 , M16 is used but tightening these isn't bad as usually more space around them However some of the newer machines all sensor cables are connected to the side of the panel with quite...
  17. edexlab

    DIN cable connection tool

    I know what your saying , the Phoenix contact version does work on both types, the knurled ones I've seen have a slight hex shape and there's an edge the hook catches on allowing it to turn although I'm not sure if it's meant to be used on this type Just as ever with specialist tools the catch...
  18. edexlab

    DIN cable connection tool

    You don't sound at all vindictive Peg !:D Yes I thought the same ie slot some long reach sockets or box spanners, not sure they'd work on some as they have knurling and a less definitive hexagonal shape, but I'll probably try this first
  19. edexlab

    DIN cable connection tool

    Does anyone know of a tool for tightening up the barrel of DIN type cable connectors Company I work for now uses a lot of this type of connection often with limited access for fingers I've seen a phoenix contact version with a hex screwdriver and a cam which slides on to the end , this hooks on...
  20. edexlab

    How Old Was You When You Became Interested In Electrics?

    I actually wanted to do bomb disposal that was until I went to the Army careers office The NCO said it's an interesting job , Technical too! , come back next week and you can have a chat with my colleague who's spent 15 years doing it! Went back the following week met the guy who'd got 4...

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