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  1. Replies
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    8,552

    Optical encoders are usually bandwidth limited by...

    Optical encoders are usually bandwidth limited by the speed of the opto sensor. FO is nice stuff. Expensive electronics on both ends of the cable but error rates are one in E-12. Even the multi-mode...
  2. XOn and XOff is the flow control to keep the...

    XOn and XOff is the flow control to keep the buffer from overflowing but since you have it working you probably don;t care. :-)
    Good job anyway. DB9's are SO much fun to solder. :-)
  3. Fadal G Code M Code Quick Reference pdf - CNC...

    Fadal G Code M Code Quick Reference pdf - CNC Manual
    sometimes google is actually useful. ;-)
  4. Replies
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    4,282

    Good Grief Charlie Brown. You work with machines...

    Good Grief Charlie Brown. You work with machines everyday that can kill or maim you. Just a bit of inattention. There is a good reason pinch points on machines are labeled. I have a friend that...
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    4,282

    That 'wonderful' smell is most likely from...

    That 'wonderful' smell is most likely from volatile fatty acids. The peroxide made the coolant oxidizing and anaerobic bacteria can't survive.
    3% H2O2 is rather innocuous however 30% is nasty stuff....
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    894

    Ethernet to machines is indeed nice. I run about...

    Ethernet to machines is indeed nice. I run about 100' of cat5 from my desktop (CAD-CAM) to my machines. Two hops: the switch near the desktop and a small switch in the shop.
    For a direct connection...
  7. Replies
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    3,315

    Well if you want pretty google Steve Earle ...

    Well if you want pretty google Steve Earle
    Fraser Action
    Lots of care and hand polish ....$$$$

    I might have it all wrong but the part seems to be made for a C axis or for a lathe.
    Just my...
  8. Thread: Clod Computing

    by ss_user
    Replies
    15
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    4,317

    My opinion: cloud is great for backup and...

    My opinion: cloud is great for backup and somewhat more reliable than the usual local system. How ever being paranoid ... I'm not, I'm not, I'm not. :-) My feeling is that the cloud should be used...
  9. Thread: Thread Chatter

    by ss_user
    Replies
    33
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    3,255

    Tape shim is a good idea but I'd go with a strip...

    Tape shim is a good idea but I'd go with a strip of soda can as a shim. Especially with jaws that leave marks on the work.

    Resonance is a bitch; ever try pushing a person on a swing not pushing...
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    446

    Not really on your list but I used a home-built 5...

    Not really on your list but I used a home-built 5 hp rotary phase converter for several years but finally bit the bullet and got a 30 Hp commercial rotary. The lights blink when I start the converter...
  11. Nothing is impossible to the person that doesn't...

    Nothing is impossible to the person that doesn't have to make it work. :-)

    I've heard of shops normalizing 4xxx steels before machining.
    Laser cut does not sound like a good idea, 4340 is...
  12. Replies
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    I've often thought about just what you did but...

    I've often thought about just what you did but never got around to it. The voltage drop across a silicon diode junction is approx .7 V but the drop across a diode in a circuit tends to be more like...
  13. Thread: ASTM A36 Steel

    by ss_user
    Replies
    23
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    66,386

    In a broad sense A36 chem spec is about .1%...

    In a broad sense A36 chem spec is about .1% higher in C and .3% higher in Mn than 1018. The range of permissible analysis is rather large for both steels. As for the chemistry of Chinese A36, etc...
  14. Replies
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    25,970

    The really good cnc hobbyist runs linuxcnc;...

    The really good cnc hobbyist runs linuxcnc; somewhat more geekie. Which is why is is not predominate in the commercial world. There are a few commercial shops running linuxcnc plus a well known CAD...
  15. Replies
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    Mineral colors are available for tinting...

    Mineral colors are available for tinting concrete. It gets troweled into the top surface of the pour. I suspect the example I saw was plain iron oxide; color similar to the classic barn paint.
  16. Replies
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    20,964

    For tall grass a roughing cut with a hedge...

    For tall grass a roughing cut with a hedge trimmer attached to the front of the mower makes serious doc a trivial issue. Rough full width and then do the finish pass with minimum overlap.
  17. Replies
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    My approach may be really dumb but when one gets...

    My approach may be really dumb but when one gets desperate... rough the slots with edm then clean up with slitting saw. Not very efficient but you've put a lot of time and money into this. I hope...
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    To the OP and really all of us. Please proofread...

    To the OP and really all of us. Please proofread your post. Being an old curmudgeon the first thing I did was check the driil size.
    27/64 is ALREADY ~.7mm oversize. Even 25/64 would have been...
  19. About us - Bernardo...

    About us - Bernardo
  20. Replies
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    3,180

    Walking thru Boeing Surplus back when it was a...

    Walking thru Boeing Surplus back when it was a storefront there was a CMM base for sale. Maybe 4' x 4' x 1' but sitting on a pedestal of another piece of pink granite of similar size. Had some kind...
  21. Replies
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    So 1.5 x 10 mm holes by the K. Ouch! Several...

    So 1.5 x 10 mm holes by the K. Ouch! Several things come to mind but then I'm still not thru my first cup of coffee.
    a. since chip evacuation seems to be the real problem not cooling(?) try high...
  22. I think 5axis has the right idea. Since Z is...

    I think 5axis has the right idea. Since Z is likely to be your stiffest axis. Plunge cut adjusting DOC and feed rate to max mrr.
    As a aside someplace on the web is a video of a vmc plunge cutting Ti...
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    If the base material is plastic then full depth...

    If the base material is plastic then full depth thread might make sense. If the material is soft enough to form tap go that way but not deeper than a good safety factor. Maybe the maker of the dwg is...
  24. It is indeed frustrating waiting for data to...

    It is indeed frustrating waiting for data to transfer. On the 19.2 vs 9.6... Only if you are getting a lot of errors and having to retransmit will 9600 be faster. From the standpoint of simplicity...
  25. Reading about the PP problems makes me grateful I...

    Reading about the PP problems makes me grateful I went with a rotary. I did a 5 HP home built rotary but finally upgraded to a 30 HP commercial. Inrush currents are nasty. Unit is fused with 125 A...
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