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mike93

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Posts posted by mike93

  1. Moving to 2018 trying to get every thing set up. Adding new tabs works great, undocked levels manager and planes manager and current tasks page,  love it. added extra change levels icons in QA toolbar  (I can not seem to find one to put in the ribbon bars?).

    But i can not seem to change the spin controls from .1 or 1 degree, changed it in config but it does not do any thing. hopefully there's an answer. and also the space bar does not work to zero out the fields? Otherwise 2018 is working great!

  2. It seems like lately the attempt to improve the process takes more time then the improvement will save, even when its more then 50 percent savings???? is changing the feed rate reprogramming is changing depth of cut reprogramming is changing to a dynamic path reprogramming? most people do not even know what a program is. how would they now if you changed it.

    Cutter comp, only  computer or wear. if you forget to put a number in  for cutter comp the part will be scrap end end mill broken off.

  3. On 10/10/2017 at 9:49 PM, Colin Gilchrist said:

    Forgetting the correct entry is an easy way to scrap a part. One useful feature of the machine is that is essentially "adds" both CRC columns together when invoking Cutter Compensation. I used this to my advantage recently in fact.

    We have a very old legacy job that is programmed using full CRC. So you must enter the actual cutter radius when setting up the job. No problem, we have a tool pre-setter, so it's not a big deal.

    The NC program however was created in a CAM system that we no longer have access to. So all we have to work with is the G-code. I found myself needing to make dozens of tweaks in different places. But I didn't want to have to "move" by editing the G-code.

    My solution was to use the Macro programming capability of the Control to my advantage. I added lines of logic to write new values to the Tool Offset Wear Registers for both radius, and length. I was able to switch from .002, to .01, to -.03, to .121, all "on the fly". Since the Wear register gets "added" to the CRC field, I could easily move +- from the periphery of the cutter, or tip of the tool. I even had some passes where I would use a negative offset on 'one side' of a cut, then switch the offset to positive, just before the move to the other side. It worked beautifully. I could take a -.0032 cut on the left, then a +.0128 cut on the right. Sooooo much easier than having to use a G52 coordinate shift for each cut on the part. And, the kicker for me was that I could adjust the part without "reprogramming it", since that was rejected by the customer. I was able to show that my modified program matched the original program path in Vericut, so they approved my method of improving the process.

     

  4. in your post you need to have the machine home out in the beginning of the program, to prevent index close to part or into part, but you should be programming in absolute so moving machine off home should not matter to ware it is cutting.

     

    there should be a parameter to only let the machine index at home or at a given spot to index. that would be better for mdi mode and you wont have to change your post.

  5. make your own library, every time you make a tool save it to the library,  its 2 clicks,  after that its one click to open library one double click to pick tool and return to tool page.

     

    make lots of library's,  for different materials different machines what have you,  you can put notes in the tool description (some odd tool you yous wants a year) its limitless. not having a library  is almost as bad as not setting the operation defaults to a good  starting point.

     

    and if you run  different stuff on different machines, pre heat, mold base, cut trodes, hard mill, you should  have different op defaults for different machines, pick the machine and it goes to the defaults for the machine and the tool library.

    • Like 1
  6.  
    Freesteel Blog » Steel cutting of shapes
    Steel cutting of shapes

    Monday, January 25th, 2016 at 1:42 pm Written by: Julian

    Here’s a quick offering from the “Well it’s better than nothing video editing department”. This is the result of 2 days of cutting from short videos taken with my camera. (I’ve got no talent with video editing.)

    I learnt one heck of a lot in the process.

    1. Steel is really difficult to work with
    Small 3mm cutters are easy to snap
    The spindle is under-powered
    Big 6mm cutters can handle being bent when the spindle stalls if you hit stop soon enough
    You can drop the feedrate briefly to stop the spindle stalling
    Multiple cutters with rest machining are essential
    0.1mm stepovers are a better than 0.2mm
    I probably need a tapered cutter to create a draft angle
    Clamps are a real hassle; I’m going to get a vice
    The noise of the machine sounds terrible, but nobody has complained yet because it doesn’t seem to carry into the hallway
    My 3D printed ductwork for automatically hoovering out the chips was a failure; I need to prod in the nozzle by hand to remove the chips

    I was using the Adaptive Clearing toolpaths in Autodesk Fusion, which I had spent 10 years developing before and after it got sold to AD.

    It sucked in several ways that I did not know about, because I’d never used it myself to get something I wanted to get done. I always said I ought to have been put on the job of using CAM software to cut steel on a machine in a factory for a couple of months at some point in my career before being allowed to continue writing software that didn’t quite do stuff right. People get into positions like I was, and seem to do pretty well, but should get the opportunity to go back and fill in some gaping holes in their experience.

    The problems I found were:

    1) Adaptive takes too long time to calculate small stepovers when clearing around a tongue of material and it has to turn right towards the material to stay in contact. This is probably because the sample rate has to go very small in order to maintain engagement when it does its straight line forward samples. It should detect these situations and do its initial step forward with a curve to the right so that begins with being engaged on the first sample and doesn’t need to resample backwards blindly until it makes contact again.

    2) The helix ramp down pitch was not linked to the tiny stepover I was setting and I couldn’t see how to change it. I had to hack the G-code directly.

    3) In spite of claims to the contrary and it being mathematically accurate, I am sure that the load going into the corners is higher than when the flank cutting is on the straight. I can hear the spindle being slowed down. This could be because the chip length is longer for the same chip width. The chip length is the distance around the circumference of the cutter that is tearing off the metal, and it can approach a semicircle in a tight corner, or be insignificant when it first engages with the 90degree outer corner of the stock.

    Now a real machine tool probably has so much angular momentum in the spindle that no one is going to notice this, but on some underpowered low-spec experimental device, such as this, it becomes apparent. That’s why future innovations would happen here, and are unlikely on the big machines where you don’t notice the flaws.

    I can now pretty much see how companies like IBM missed the first wave of the PC, which were toy devices in comparison to the big mainframes they were playing with. Nobody was ever going to do any real work on those barely-up-to-scratch microcontroller-based computers with deplorable amounts of RAM, audio cassette tapes for backup, a complete joke parody of an operating system from Microsoft, and a lack of customers able to pay big bucks. Most of the professional engineers in the world (software and hardware) had all the access they needed to mainframe computers in their workplace or university institutions to do fluid dynamics or graphics or simulations. I’m sure when some overly keen teenager came along with their toy machine he’d soldered together, they put him in his place with a back-of-the-envelope calculation of how many centuries it would take that Apple2 to do something real, like predict tomorrow’s weather, which was something they could do with their latest cool CrayXMP super-computer machines. PCs were obviously an utter waste of time, and because was clear where the cutting edge was if you wanted to actually get stuff done.

    Sure, you could say this left a huge gap in the economy for new tech billionaires to emerge and for IBM to eventually become an embarrassment, but think about the wasted capital and precious engineering time of talented people who should have been deployed to make this microcomputer tech good from the beginning. MS/DOS and MSWord might not have existed in the horrible no-good forms they did had it not been left only to people who didn’t know what they were doing and had to learn as they went along, thus locked in their anti-productive design mistakes into the way this tech worked for the next 30 years.

    Meanwhile I’ve no idea what I am doing. Should I spray WD-40 onto the metal while it is cutting?

    Monday, January 25th, 2016 Written by: Julian Adaptive, Machining Trackback URL for this entry

    1 Comment
    • 1. Greg H. replies at 26th January 2016, 1:00 pm :

      You took the words from my mouth. I have been posting on the HSMWorks forum for a long time that development should run machines with the code they develop. Or development should hire seasoned machinists to run the code. Relying on customer feed back is the lazy way out and not very productive.

      As for coolant you want a coolant that is for cutting steel. WD-40 is OK for non-ferrous materials like alum, brass, copper. It is better than nothing at all on steel. I’m sure there is a machine shop near by, they will loan you some for the steel. Your machine seems a bit flimsy.

      Have a good one!

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