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Type: Posts; User: RJT

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  1. Replies
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    649

    Material for program tryout

    We are quoting on some making several different large 1 of a kind parts out of Delrin (5 by 10 by 40" $$$). They have a lot of detail and I would like to machine a tryout piece before we start...
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    3
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    269

    It looks like Marty McFly's flux capacitor, but I...

    It looks like Marty McFly's flux capacitor, but I may be mistaken.
  3. I believe you mean the feedback comes from the...

    I believe you mean the feedback comes from the encoder on the ballscrew, not the motor.
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    4
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    419

    I believe creep feed grinders always climb cut,...

    I believe creep feed grinders always climb cut, so that would be my guess. Coolant has better egress that way.
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    411

    Yes, I think GD is correct. We have had a G18 for...

    Yes, I think GD is correct. We have had a G18 for 20 years. We also have wire EDMs and if the hole goes through, we will wire it. If not, we will hard mill in in VMC. If that doesn't work, we will...
  6. We have used the standard RS232 interface for 15...

    We have used the standard RS232 interface for 15 years and never dropped a single character. Serial port on your PC, snyc it up, make a cable, transmit data.
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    1,176

    A good sulfur based cutting oil brushed on during...

    A good sulfur based cutting oil brushed on during the cut will help. Probably going to create some smoke and can get messy, but well worth the inconvenience.
  8. Replies
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    866

    Did they replace the seals? Or are seals external...

    Did they replace the seals? Or are seals external to the bearing assembly and part of the responsibility of whoever installs the spindle? Hard to judge without knowing the details of how everything...
  9. Thread: Surface finish

    by RJT
    Replies
    6
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    655

    If you are expecting shiney , not so much. But...

    If you are expecting shiney , not so much. But check with a profilometer a 6-8 micro inch Is possible with the right condtions and skims or orbit and electrode prep. Are you asking about wire or...
  10. Thread: Coolant change

    by RJT
    Replies
    20
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    1,274

    Much less frequently now that we have colasers...

    Much less frequently now that we have colasers (works better than skimmers) . 18 -24 months average, smell is one factor, contamination from plastic is a big factor for us. Keep tanks full and keep...
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    8,523

    Just don't do this: 311989

    Just don't do this:

    311989
  12. Replies
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    1,545

    Beat me to it....

    Beat me to it.
    https://www.mscdirect.com/product/details/79731782

    Cheap compared to what?
  13. I've been very happy with Doosan, both lathe ,...

    I've been very happy with Doosan, both lathe , mill, and mill turn. All Fanuc control.

    Sent from my moto z3 using Tapatalk
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    441

    Sounds like the upper contact is not secure. ...

    Sounds like the upper contact is not secure. What holds it in place? I would triple check it. We have had similar issues and the contact starts eroding its holder which gets ugly fast.
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    854

    Does the wire lay flat and coil, or just end up...

    Does the wire lay flat and coil, or just end up in a huge birds nest and short out? When chopper fails on our machine its the latter. Maybe without the unit on it would act differently.
  16. Replies
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    6,396

    25 years ago we used iron pipe, its still up in...

    25 years ago we used iron pipe, its still up in the joists working just fine. A few years ago we added an air turbine and started getting starved for air, so upgraded compressor and dryer, finished a...
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    6
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    854

    Work is fairly slow in the shop, if I can save...

    Work is fairly slow in the shop, if I can save $400.00 (the cost here) with a few hours work, its worth it to me.
  18. Replies
    6
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    854

    Resharpen wire chopper Mits FA20

    Looks like we could grind the carbide blades between centers and lower the bushing by however much we grid off the blades. Anyone done it? Any tricks I should know about? We have already reversed the...
  19. No problem, just over 4" thick, 150 parts per...

    No problem, just over 4" thick, 150 parts per stack, mixed stainless and aluminum. .005, .015 and .050 thick shims. Only broke the wire 1 time.

    310421
  20. Replies
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    689

    We did the entire building (shop and offices) a...

    We did the entire building (shop and offices) a few years ago and haven't had any interference. Eliminated ballasts and did a 1 to 1 replacement of fixtures, so no re-wiring. So far 100% pleased and...
  21. Is the shape / size / material of the electrodes...

    Is the shape / size / material of the electrodes on the other machines the same? Cables / grounding / maintenance any concern on this machine? Dielectric the same, and same condition / age? ...
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    Its not a matter of dull punches, new or freshly...

    Its not a matter of dull punches, new or freshly sharpened punches and die buttons still leave a burr. I'm going to decrease the clearance and see if that helps. Yes the slug is what I am interested...
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    589

    Punch and die clearance

    Customer is punching .021" thick 316 stainless 2 layer mesh (sintered wire screen filter). Its made of stainless wire that has been fused together to form a very fine filter. Starting with a .569...
  24. We have done plenty of stacks screwed together,...

    We have done plenty of stacks screwed together, so I think we will be fine with keeping things secured, l know the potential problems well. My concern was only with the different material in the same...
  25. Wire EDM steel and aluminum sandwiched together

    I have an order to make several hundred shims, 3 different styles. I will be stacking 50 each .001" stainless, .005 aluminium and .010 aluminium sheets, screwed together with a top and bottom 3/8...
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