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Type: Posts; User: gregormarwick

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  1. Replies
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    You have live tools on your lathe? Cut some...

    You have live tools on your lathe? Cut some interruptions where necessary before turning.
  2. Replies
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    369

    USB sticks, CF cards etc. are a huge pain in the...

    USB sticks, CF cards etc. are a huge pain in the arse. We've been doing that for years and I have had enough. Way too much foot traffic.

    I had an epiphany last year when I realised that I was...
  3. Many (most) of the fundamental concepts of Hurcos...

    Many (most) of the fundamental concepts of Hurcos conversational have not changed significantly over that time. You will have some quality of life features that don't exist on your old control, but...
  4. Going from 1" to 14mm is a higher DOC than I've...

    Going from 1" to 14mm is a higher DOC than I've personally done before, but I've had surprising success on long skinny parts by taking one pass to size using a VBMT/VCMT. With the fairly large stock...
  5. Thanks for the data point. This doesn't...

    Thanks for the data point.



    This doesn't answer the original question though. Know anything about that that the previous responder might have missed?
  6. I haven't used it myself, so I'm not making a...

    I haven't used it myself, so I'm not making a recommendation. Only that the adaptive paths look like the real deal from pictures.
  7. Freecad has a decent adaptive clearing toolpath,...

    Freecad has a decent adaptive clearing toolpath, could study the source for that.
  8. Replies
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    I was under the impression that uhmw cannot be...

    I was under the impression that uhmw cannot be injection moulded anyway?
  9. Did you buy the machine as a non-runner, or was...

    Did you buy the machine as a non-runner, or was it sold to you as working? Why might the board be missing?

    Don't go blindly buying boards!

    Even if you correctly identify which board is missing,...
  10. Do a similar ACME then, it's not important. ...

    Do a similar ACME then, it's not important.

    The method is not dumb, it's extremely effective.
  11. Come on man, respond on topic.

    Come on man, respond on topic.
  12. Indulge me then, and write a program in apt to...

    Indulge me then, and write a program in apt to generate, for example, a TR100x36P12 (12mm pitch / 36mm lead, three start) external thread using a 4mm grooving tool. I'm genuinely interested to see...
  13. Not what I am asking about, but definitely...

    Not what I am asking about, but definitely interesting! I could probably replicate that in FC, but it would take a fair amount of work to get such a clean toolpath, considering the irregular...
  14. So you have a small, semi-enclosed centre lathe...

    So you have a small, semi-enclosed centre lathe with a teach style control, currently equipped with a manual toolpost, and probably equipped with the original coolant pump, as a dribble of coolant is...
  15. You have probably picked up on my interest in old...

    You have probably picked up on my interest in old computer technologies, but it's a fools errand to pursue obsolete technologies in the workplace and I am careful to keep my work and my hobbies...
  16. You again! I'm beginning to think that I need...

    You again!

    I'm beginning to think that I need to learn apt just to shut you up :D
  17. So we've established that besides FC, MC also can...

    So we've established that besides FC, MC also can do this.

    Any others?

    Am I wrong that it's an uncommon feature - maybe just a seldom used one that users are not always aware of?
  18. As long as there is somewhere for the coolant to...

    As long as there is somewhere for the coolant to go, it will never develop much pressure against the tool. It can be an issue if you turn through coolant on on a tool that has no through coolant...
  19. Number of passes simply depends on tool radius...

    Number of passes simply depends on tool radius and acceptable cusp height, same as milling a surface with a ballnose.
  20. So just to clarify, it's limited to those...

    So just to clarify, it's limited to those threadforms specifically, or you can define an arbitrary cross section/threadform with a curve?



    Not sure exactly what you mean, but my typical...
  21. Replies
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    Lead angle on OP's thread is 13°25' - a typical...

    Lead angle on OP's thread is 13°25' - a typical grooving insert will have 7° of side clearance angle, so another 7° of tool tilt, some front rake ground on the holder, and you're good to go. Tilting...
  22. Using a cross section curve to drive threading passes - how many CAM supports this?

    Inspired to ask by a recent thread in the CNC sub.

    I use FeatureCAM, and I use this function reasonably frequently to generate large threads or other spiral forms (rope drums etc.)

    It seems...
  23. Replies
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    Spiel claims increased stiffness relative to the...

    Spiel claims increased stiffness relative to the width of the cut, deeper parting than conventional per given width of blade.

    I have used the Sandvik system and it works as expected, but I haven't...
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    This same method works fine on parts like op's...

    This same method works fine on parts like op's except with a plain grooving tool instead of a full radius one.

    I use this method quite often, but it's easy for me because my CAM supports it...
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    Bob already said as much but I'll try to...

    Bob already said as much but I'll try to rephrase.

    You have conflicting specifications and some overoptimistic expectations. 0.1μm resolution is meaningless on platforms that are physically...
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