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Type: Posts; User: Big_d

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  1. Replies
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    Views
    5,942

    Hello JerryFlyGuy I built a spindle a few months...

    Hello JerryFlyGuy
    I built a spindle a few months ago that was oil filled and did 1.5~10K RPM. The only way around the spec was to use a mechanical seal. It was a simple carbon on steel arrangement...
  2. Replies
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    1,098

    The delrin is coming out

    I Was servicing one of our CNC's today and noticed one of the delrin strips on the X axis has started to work its way out past the wiper. I have never tried to reattach this before any tips? The...
  3. Replies
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    5,094

    Check the cables they have been the cause of many...

    Check the cables they have been the cause of many a drive failure on these.
  4. Replies
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    5,094

    Ours was a 78 from memory? We had a different...

    Ours was a 78 from memory? We had a different brake on the end of the spindle motor. The spindle brake is part of the live spindle option and we didn't have this on our machine as it was only used...
  5. Replies
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    3,107

    Hello pinguS When I normally test this I do...

    Hello pinguS
    When I normally test this I do something a bit dodgy but it gives me a good answer each time. I will put my foot on the motor pulley (Belts removed) and load it a little at low jog...
  6. Replies
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    4,685

    Without stressing the obvious have you considered...

    Without stressing the obvious have you considered putting the cover on??? Perhaps you could try throwing the wood shavings into the bin rather than on your pc.
    But seriously a low cost fix for that...
  7. Replies
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    3,107

    I would say it is the spindle motor resolver....

    I would say it is the spindle motor resolver. This causes the spindle motor to hunt as the controller try's to fire the phases to keep the rotation correct.

    Drop the belts of the motor and check...
  8. Replies
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    5,094

    Wow a LC40 a lot of machine for that kind of...

    Wow a LC40 a lot of machine for that kind of money. They are very solid and quick if you use both turrets at the same time. Hence the 60hp DC motor (About equal to a 25-30hp ac motor). We used to...
  9. Replies
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    5,094

    On some machines you can get away with this, but...

    On some machines you can get away with this, but you are taking a BIG risk as if the spindle is powered whilst holding it could take off if you manage to move it a little. PLEASE don't do this!
  10. Replies
    17
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    2,705

    The old chestnut " Coolant/Moisture contaminated...

    The old chestnut " Coolant/Moisture contaminated spindle bearings".

    The air you feed into the spindle bearing cavity needs to be the driest and cleanest you can achieve (As you have already...
  11. Replies
    173
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    32,448

    Hello Henrik You could easily do away with a...

    Hello Henrik
    You could easily do away with a regulator for the positive pressure by just using a short plug and drilling a small hole in it (1~1.5mm) then feeding the air past it. A little trial...
  12. Replies
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    1,387

    To get a good cut and finish you have trouble...

    To get a good cut and finish you have trouble breaking chips of Teflon. I have used a vacuum attachment on the tool post before to control the stream and keep the dust down.
    Cheers
    Darren
  13. Replies
    173
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    32,448

    Hello Henrik It is a shame that you had to...

    Hello Henrik
    It is a shame that you had to return it to the grinders, But this job will get them onto their toes.
    The top diameter will also require regrinding as it will be difficult to true up in...
  14. Replies
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    2,618

    If it was my machine I would confirm the load via...

    If it was my machine I would confirm the load via a tong test meter. There could be a problem with drive belts??.
  15. Replies
    173
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    32,448

    Mike 20000 rpm with a BT30 you don't want much...

    Mike
    20000 rpm with a BT30 you don't want much do you. :drowning:
    To get those sort of speeds with such large bearings is a challenge. You could get it up to 15000 rpm with a few changes with a...
  16. Replies
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    32,448

    Henrik I wouldn’t be to worried about the...

    Henrik
    I wouldn’t be to worried about the moisture as it doesn’t really matter with a tool in spindle setup. The worst thing that could happen would be it could make it cut oversize slightly. It is...
  17. Replies
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    32,448

    Henrik 10 - 20 microns run out is not a lot but...

    Henrik
    10 - 20 microns run out is not a lot but will show up with long tooling. Where is that measurement taken from, the tool cone? Tool cones are quite difficult to machine (Even machine tool...
  18. Replies
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    32,448

    I nearly forgot, Make sure you have clearance...

    I nearly forgot, Make sure you have clearance between the bottom face of your tapers as they are not made to run true off that face. For that style of drive you need a HSK.
    Cheers
    Daza
  19. Replies
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    32,448

    Very nice work H.O! Those bottom bearings...

    Very nice work H.O!

    Those bottom bearings should be good for 6500 rpm without any problems. If you ever make another may I suggest a small change to the way you retain the bearings on the bottom...
  20. Replies
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    1,542

    We had this problem with one of our 810's a few...

    We had this problem with one of our 810's a few years ago. 2 weeks and the back up battery was dead. It was the memory board inside the controller, I don't know what it was exactly but once replaced...
  21. Replies
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    1,701

    I think you would be able to get a little better...

    I think you would be able to get a little better casting if you did a few things to the mould. You may have some hydrogen in the metal but I think the holes are mostly due to not having enough...
  22. Replies
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    Hello gearsoup This is a tricky one,I am making...

    Hello gearsoup
    This is a tricky one,I am making a few assumptions as I have never seen one of these machines but they are mostly all the same. Have you tried to operate the spindle orient switch...
  23. Replies
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    4,748

    You have probably all ready looked but could it...

    You have probably all ready looked but could it be the attachment of the spindle encoder shaft being loose or bad bearings? It would explain both the hunting at low speed and the difficulty...
  24. Thread: Fanuc O-m Chiron

    by Big_d
    Replies
    16
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    6,902

    Hello John Chirons I have seen all tool change...

    Hello John
    Chirons I have seen all tool change on the fly. They don't use a fixed position to pick up the tool that's why their tool change is so quick. They use a single drive key/dog that is...
  25. Thread: Fanuc O-m Chiron

    by Big_d
    Replies
    16
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    6,902

    This should do it

    Hello Turner
    That is a fairly common problem with a Chiron. 160 rpm on all of ours for the drive dog to engage. I am assuming you don't have a HSK taper in your spindle (Never had one of those...
  26. Replies
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    6,830

    I have had a bit to do with a single Femco...

    I have had a bit to do with a single Femco machine. We had one in our shop for about 10 years 7 years ago.. One of the few machines we have had in our shop that didn't ever need spindle bearings...
  27. Replies
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    It sounds like a pretty heavy crunch. Our Pumas...

    It sounds like a pretty heavy crunch. Our Pumas have hydraulic turret rotation so I am not 100% on how yours would work but I know that the idler gear that rotates the turret must go into the correct...
  28. Thread: Fanuc O-m Chiron

    by Big_d
    Replies
    16
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    6,902

    Happy to help with any mechanical issues we got a...

    Happy to help with any mechanical issues we got a couple of WM03's/FZ22?, DZ18 Magnum and a DZ12 that should be very similar to the FZ12/WM02. Sorry cant help with the Fanuc OM on a Chiron we also...
  29. Replies
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    For home use it would be a lathe hands down. You...

    For home use it would be a lathe hands down. You have time at home and can do many milling jobs with a bit of ingenuity. I even have a home made slotting attachment on my old clunker in the shed. I...
  30. Replies
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    The easiest way to square a spindle I have found...

    The easiest way to square a spindle I have found is to fit a tool to the spindle that the magnetic base will stick to and set you dial indicator as wide as possible and clock the table. You should be...
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