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IndustryArena Forum > MetalWorking Machines > Haas Machines > High-Speed Machining for Macros? Yay or Nay?
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  1. #1

    High-Speed Machining for Macros? Yay or Nay?

    As the title suggests. Is it worth it? We almost never use CAM at work, 99% of the parts we make are just too simple to justify it. Although, I do use a lot of macros that result in a lot of tiny G01 movements. So the question is would this reduce cycle time and if so, how much? The price tag is a bit ouch but if It reduces cycle times by let's say 25%, then maybe it's worth it? What do you think?

  2. #2

    Re: High-Speed Machining for Macros? Yay or Nay?

    I personally think the high speed machining option is a must have to begin with but especially so with short segmented moves . Adding the high speed was a world of difference , and it was the difference of having mills nearly bouncing off the ground to smooth machining with fine line segmented code . One thing I noticed was that the machines wouldn't necessarily always reach high programmed feed rates , probably due to so much processing . Either way it was still much smoother and faster .

    how much time you will save is going to be dependent upon your runs and it's tough to say how it'll react to macro but it should be an improvement . Has your mill already run the trial period ?

  3. #3

    Re: High-Speed Machining for Macros? Yay or Nay?

    Quote Originally Posted by metalmayhem View Post
    Has your mill already run the trial period ?
    Right. I forgot about the trial thing. I tried it today but it only reduced the time by 4s (83s to 79s). That's only a 5% reduction if my math is right. The tool I'm using is a small backside chamfer tool that cant be run that fast (400mm/min at 5000rpm). If I use a normal chamfer mill I could run it at 12000rpm and 2400mm/min. Maybe then it would make a bigger difference?

    Edit:
    I tried running it in the air with a 2400mm/min feed rate. The difference was much greater this time. 35s compared to 55s so that's a 20s difference. That's a 36% reduction! Also, I did notice the machine was stuttering a lot without HSM.

    Now the next issue. How to bring this up to my boss without giving him a heart attack.

  4. #4

    Re: High-Speed Machining for Macros? Yay or Nay?

    in the big scheme of things it's a cheap option for a business . The stuttering will affect surface finish because the tool isn't able to run at a constant feed . Time savings over a week are not going to be all that noticeable but over the lifetime of the machine it will pay off . I think it's much easier on the mill itself to be running smoothly which could be a potential sales pitch to the boss , " preventive maintenance "

    When I started with the last company I was quick to have them upgrade all the mills after pleading my case , and at the time it was something like $2500 / mill . It improved everyday operations since most of the work was aluminum and we had the mills hauling pretty good
    Now I only work for myself using hobby grade mills but the same principles stand out strong . I do a lot of surfacing and a previous control software tended to jitter a lot through short line segment code . Since crossing over to a better software which runs the same programs much smoother - long cycle times are shorter and surface finishes are better because the tools run at constant feeds vs little dwell points

    have you tried g187 ?

  5. #5

    Re: High-Speed Machining for Macros? Yay or Nay?

    Quote Originally Posted by metalmayhem View Post
    have you tried g187 ?
    I have not. I don't think corner rounding would make a big difference since there are no sharp corners in the tool path. Maybe using P1(rough) would tho? I'll try it next time I get a chance.

  6. #6

    Re: High-Speed Machining for Macros? Yay or Nay?

    I have my doubts but it's worth a shot . P1 would be the best one to try

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