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Thread: Climb vs Conventional
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23rd May 2011, 04:48 PM #1
Climb vs Conventional
Hi Guys
Apologies before I start as I know this issue has been widely canvassed both here and on other forums, but I am still trying to work out the reasoning behind each approach.
Is it better to use Climb with profiles and Conventional with pockets, or the other way about.
Vectric appears to default to these modes, but I am not sure.
Looking down from the top of the spindle, the tool rotates in a clock-wise manner in all modes.
When profiling, the spindle moves in an anti-clockwise direction during a Climb cut, and in a clockwise direction when doing a Conventional cut.
When pocketing, the same directions are folowed, but starting from the centre and working out.
It seems to me that a different cutting geometry is presented by the tool 'blades' during profiling vs p[ocketing, and I was wondering why this should be so, and what if any advantage/disadvantage could be gained/lost by changing from Climb to Conventional.
My impression is that when doing a Climb pocket, the cutting faces of the tool seem to 'polish'the surface as the action occurs, while with Conventional, it appears to make a çleaner' cut.
If this is so when working with wood, would this also be the case when cutting aluminium, or would it actually be better to transpose each option. (Wondering if having the tool cut in Climb mode might lessen the tendency for the tool to 'dig in'in thinner aluminium sheets.
Hope this doesn't start another controversy/debate/argument/different points of view, etc, but the more I think about this the more obscure it seems to get.
Any ideas/thoughts/points of view would be very welcome.
(I have actually gotten off my backside and tried all the options in both wood and aluminium, but am not really much clearer at this point).
Hopefully, either Greg or Rod, or anyone else with a sound knowledge of milling various materials will know.
Cheers
Noel
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8th June 2011, 10:49 PM #2
Unfortunately I can not claim sound knowledge of CNC machining. Most of what I have learned is from practical experience of which I have a little, and tutorials for Vectric software, but here's my 2c.
I believe the software compensates for profiling or pocketing toolpaths to maintain the desired climb or conventional cutting method selected.
The conventional cut is more aggressive resulting in more chance of chipping and breakout in brittle materials. Personally I rarely use it on timber unless rough surface milling, but I always use it on Ally although I have done very little machining of it. I think the router loads up a little less using climb cuts.
Not sure if this helps.Simple solutions are only simple in hindsight.
See my rig here- https://www.woodworkforums.com/f170/my-junkbot-123715/
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10th June 2011, 11:11 AM #3
Hi Thunker
Yes - That's pretty much what I figured out - ity is better to change the direction of cut for aluminium - it does tend to clog up the cutters less, and as far as I can see, there is no appreciable difference in the finish of the cut.
thanks for the reply.
Cheers
Noel
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