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| Aluminium CNC build (TEP mill converted) by Craynerd |
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| raynerd:
Ok, this one is driving me bonkers and I know we have quite a few cut2d and vcarve users in here so maybe someone can help. For the past 3 hours I`ve been trying to produce the code to cut a clock wheel: http://www.raynerd.co.uk/images/wheel1.pdf Nice big wheel, 2.5mm or there abouts gap between the teeth which is good because my smallest endmill is 1.95mm which I`ve selected along with a profile toolpath cutting "outside/right". However, I keep getting an undercut on the tooth tips! Here is a picture of the preview: Is it trying to get right into the corner of the root of the tooth and therefore the radius of the cutter is causing the undercut? If so, is there anything I can do to stop this. I know for a fact that a lot of people are using cut2d to cut wheel but none of them describe the settings they are using. Also, is there a better tool than an small endmill to be using to cut this out...I presume there must be a narrower option for smaller wheels i.e smaller gaps. Very sorry if there is an obvious answer or way to correct this! Any help appreciated! Chris |
| philf:
--- Quote from: craynerd on April 06, 2012, 06:31:04 PM ---Ok, this one is driving me bonkers and I know we have quite a few cut2d and vcarve users in here so maybe someone can help. For the past 3 hours I`ve been trying to produce the code to cut a clock wheel: http://www.raynerd.co.uk/images/wheel1.pdf Nice big wheel, 2.5mm or there abouts gap between the teeth which is good because my smallest endmill is 1.95mm which I`ve selected along with a profile toolpath cutting "outside/right". However, I keep getting an undercut on the tooth tips! Here is a picture of the preview: Is it trying to get right into the corner of the root of the tooth and therefore the radius of the cutter is causing the undercut? If so, is there anything I can do to stop this. I know for a fact that a lot of people are using cut2d to cut wheel but none of them describe the settings they are using. Also, is there a better tool than an small endmill to be using to cut this out...I presume there must be a narrower option for smaller wheels i.e smaller gaps. Very sorry if there is an obvious answer or way to correct this! Any help appreciated! Chris --- End quote --- Chris, I took your PDF and opened it in Cut2d. I used a 2mm cutter and it looked fine: Did you join all the vectors? I did. If you selected individual lines then that may be your problem. Cheers. Phil. |
| raynerd:
:doh: ooops, that could be the issue. What do you mean by join them, how do you join them? Your right, the wheel is made up of all individual small vectors. I`ve tried selecting them but don`t seem to have any option of joining them. |
| John Stevenson:
Go edit show open vectors and you will see dotted lines, then go edit > Join open vectors and it tells you how many are left after the operation, should be 0. |
| raynerd:
:doh: Wish I would have read about that earlier, that explains a few strange behaviours I`ve been seeing in the gcode! Thank you both - preview shows it is OK now and I will try cutting later today. Chris |
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