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  1. Replies
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    Pocketing/ finishing don't reach edge.

    Hi, when doing 3D offset pocketing, and also other 3D finishing cuts where the surface has an adjacent vertical face at its edge, the cutter always leaves some material at the edge (on the vertical...
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    Re: Suitable cutters for ply/ chipboard etc

    OK that helps a lot, thanks Gerry. I did get more success this afternoon increasing the feedrate and reducing spindle RPM. In future I'll stick with 6mm or bigger, and keep the plunge depth a bit...
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    Suitable cutters for ply/ chipboard etc

    Hi, I have a good quality solid CNC router mill. When I try to cut thick ply or cabinet board etc using a 2 flute endmill, the cutter gets terribly hot. For example at the moment, cutting pieces from...
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    Re: Help - servos not working.

    Hey Gerry, thanks. I have been busy but got time to have a look at it again this afternoon. I disconnected the Z gecko drive, and the X and Y drives fired up normally so I thought yay, it’s all due...
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    Re: Help - servos not working.

    Can anyone help?
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    Help - servos not working.

    Hi - I am a relative newbie to CNC. I have a good solid quality mill that I bought about 5 yrs ago to make model aircraft moulds. It has a UCCNC ETH-300 motion controller, CNC4PC C23 breakout board,...
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    "Cut Link" function?

    In Madcam, there's a tool parameter called "Cut link distance" which is very useful. When doing a big parallel finishing job with thousands of passes like the curved 3D surface in a wing mould, you...
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    Rhinocam version choice

    Hi, I'm a hobby guy with a good CNC 3-axis mill that I can use to make model aircraft moulds, but I don't understand the complexities of CNC.

    I have been using Rhino and Madcam with pretty good...
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    Re: Mystery missing bit on planar finish path

    I got this reply back from Joakim at Madcam support (sorry it will be a bit clunky without the pictures):

    This is a bug when using flat cutters. It has to do with the clipping planes. It will be a...
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    Re: Mystery missing bit on planar finish path

    Yes as mentioned below I tried adding height to the madcam box but it didn't help.
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    Mystery missing bit on planar finish path

    Hi,
    I can't understand why the planar finishing toolpaths keep missing a bit, the highest part of this slightly convex wing shape. I haven't had this problem before.

    If I set the angle limit on...
  12. Re: Request re: Cutting Moulds for Composite Model Gliders

    Hi Seppo, I bought my own machine 3 years ago and have cut quite a few moulds now:
    https://www.rcgroups.com/forums/showthread.php?1968257-AvB-getting-a-CNC
  13. Re: MIRRORING ENTIRE DRAWING WITH TOOLPATHS?? IS THIS OK?

    Hmm, well I've just had the first problem. I mirrored some of the first toolpaths with no problems. But I mirrored some finishing Z and planar cuts for the fuselage cavity which use an 8mm ballnose...
  14. Re: INACCURACY POCKETING AND PROFILING CYLINDRICAL HOLES (instead of using drill)

    Thanks. Yes, I should buy the drills. However my CNC adventures are infrequent and the holes are just a final step, so although it's mildly annoying it's not a big deal to fiddle around with test...
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    Re: How happy are you with MadCam?

    Dan I think the default cut link distance is zero (the parameter box is empty), which forces all moves to retract? Is that right?
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    Re: How happy are you with MadCam?

    Gregore, I'm no whiz, so perhaps others would have better suggestions. But what I do is:

    Create a layer called eg "Fake lifted surface".

    Select the surface or surfaces you're cutting, and copy...
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    Re: How happy are you with MadCam?

    Just reviving this thread ... I started out as a CNC novice 3 yrs ago (still am) and elected to go Rhino/ Madcam/ Mach3. I certainly have had lots of difficulty getting a grasp of the concepts of...
  18. Re: INACCURACY POCKETING AND PROFILING CYLINDRICAL HOLES (instead of using drill)

    Thanks gentlemen, I hear what you're saying - good advice and much appreciated. However I feel that something is going on ... the cutters measure up at 8.00 with the Verniers - the one I used...
  19. INACCURACY POCKETING AND PROFILING CYLINDRICAL HOLES (instead of using drill)

    When I do the alignment dowel holes around the flanges of the model aircraft moulds, they vary in size depending on what the guy uses for his alignment dowels, e.g. some are for 1/4" tubing, some for...
  20. Re: MIRRORING ENTIRE DRAWING WITH TOOLPATHS?? IS THIS OK?

    Timely reply Sven. Just right now I've taken the finished drawing of the left side mould, selected everything (drawing and all Madcam toolpaths) and mirrored them. I went through the toolpaths...
  21. Re: MIRRORING ENTIRE DRAWING WITH TOOLPATHS?? IS THIS OK?

    Thanks very much Dan, I'll check.
  22. Re: MIRRORING ENTIRE DRAWING WITH TOOLPATHS?? IS THIS OK?

    Hey Dan, if I did try mirroring everything, is it apparent if the clipping planes invert themselves? Or is the problem hidden somehow? I would like to try it and see if it works - but I'd need to...
  23. Re: MIRRORING ENTIRE DRAWING WITH TOOLPATHS?? IS THIS OK?

    Great advice thanks Dan. I'm really surprised that mirroring could invert the clipping planes! Seems strange when everything else in the drawing would mirror only around the Y, but I don't understand...
  24. MIRRORING ENTIRE DRAWING WITH TOOLPATHS?? IS THIS OK?

    Hi,
    I am a fairly basic amateur, having played intermittently with Rhino, Madcam and a fairly good solid accurate 3-axis router table for 3 years now. I have had pretty good success making model...
  25. Re: Different feeds and speeds for same cutter in group postprocessing.

    Ah, that's a great tip, thanks!
  26. Re: Different feeds and speeds for same cutter in group postprocessing.

    Thanks very much Sven. OK, I understand what you're saying. I almost exclusively cut the moulds in Corian (or similar solid benchtop) acrylic and it is very tolerant of feeds and speeds. I was...
  27. Re: Different feeds and speeds for same cutter in group postprocessing.

    Thanks. OK, so I guess you can still postprocess them together if they are the same cutter size, and just ignore the M6's?
  28. Different feeds and speeds for same cutter in group postprocessing.

    I've been using Rhino and Madcam for about 18 months now and have great results generally, but of course there are always new things to work out.

    I am a bit confused about how the cutter settings...
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    Re: Cutters for high speed deep profiling?

    Good tip, thanks.
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    Re: Cutters for high speed deep profiling?

    That's a great help, thanks. I haven't managed to find long flute lengths there but did find THESE with reduced shank. Probably not their intended use, and an expensive item. I will email them to ask...
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