Hobby CNC: depths and speeds
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- čas přidán 9. 09. 2024
- I've been making end-grain cutting boards with v-carved inlays since about a year. I've experimented with a lot of tool path strategies: is "fast and shallow" better than "slow and deep"? I've decided to test it a bit more systematically.
Super test. Merci !
Super ce petit essai ! ça me donne des idées de réglages a tester sur ma machine ;)
Personnellement je ne vois pas trop de différentes sur la vidéo entre les différents réglages, a part les copeaux ^^
Merci pour ta vidéo !
I can confirm that deep and *slow* works better - I had a failure in my multiple wood endgrain cutting board where the cherry inlaid into maple (straight inlay) exploded when carving the v-pocket into it for third wood. This was on the first shallow pass of the v-bit after doing the pocket with an endmill... the thinner pieces simply shattered. I am going to try to salvage the pieces as best as I can and fill the rest with cherry sawdust mixed with titebond 3. If I had done it in a deeper pass at a slower speed I bet it would have held better because more material would have been there to stabilize the area being cut during cutting, and this would be far weaker than the steel v-cutter regardless (so there was no need to take it so easy on the bit).
What I sometimes do when there are really delicate parts to carve is do the V-bit before the end mill. My theory is that you get less breaking when the wood is still supported from both sides.
@@stephanforseilles this is a good idea but I get a lot of fuzziness this way.
@@danielsmullen3223 What I've learned is that sometimes the angle of the bit is not exactly what's on the box. If it's actually wider than VCarve expects you'll remove too much material and it will be loose.
Salut
Sympa cette vidéo de test. Mais le fait que tu utilises en général du bois debout ne permet pas de conclure les mêmes données qu'avec du bois dans le sens du fil ?
Il y aurait sûrement plus d'arrachement et une précision moindre ?
Ce que j'ai constaté c'est que je peux aller plus vite dans du bois debout. S'il est 'couché' je peux ne peux pas aller vite selon que je suis dans le sens du fil ou perpendiculaire. Pour l'arrachement il n'y en a pratiquement pas (si le bois est dur) avec une fraise 'downcut' sauf si tu as des lignes trop fines.
Very interesting video. I like it. It is however important to specify the RPM of your Spindle.
Thank you
Thanks. It's around 20k for the 1/8' and 16k for the 6mm bits.
What rpm did you use for your spindel?
Hi Stephan,
does this mean you are giving up on the other method you showed us - using multiple toolpaths to get down to the desired depth?
Hello. No because I often have to go deeper (13, 15mm) and will stil l do it in multiple passes. But maybe 2 instead of 3!
On attend la maj de ton tuto vidéo sur le vcarving avec les nouveaux paramètres 😁
Il m'a pris tellement de temps à faire celui-là, il va falloir que je me re-motive. :D
I’m trying to find the vbit that you used. Everything I can find has a flat tip
In reality they all have one, nothing is 'atomic sharp'. On a 45° this doesn't matter but on 20 or less it does. I've made some tests lately and I get often better results when configuring them as engraving bit because in v-carve you can configure a flat tip on those.
je débute en CNC (j'ai une petite machine Diy de 400x900) et la 1ere réflexion que je me suis fait c'est 'bah... il va pas assez vite',tu dois pouvoir aller facilement 30% plus vite sur toutes les profondeurs... dites moi si je me trompe
Je faisais des tests avec l'Aureus pour avoir la meilleure précision et comme c'est une machine profilés alu, il faut choisir vitesse ou précision. Dans mes plus récentes videos, avec la Sorotec, je vais beaucoup plus vite.
@@stephanforseilles j'ai vu après que la vidéos commençais à dater, mais merci d'avoir repondu 😊
Hello,
but slow and shallow seems to be more accurate when in comes to corners. This can be seen at the edges of the stars. So I would say it depends on the motive you have to carve, doesn't it?
I've checked the 2 10mm stars (the very slow and the less slow) and they have the same pointy corners, not super accurate. I thing it's more linked to how Vcarve handles the corners with deep carvings and if I did 5x2mm instead of 1x10mm i'd get the same result. Something to be investigated!
so how about the same test for face grain
Hello Stephan Nice video😁what is the spindel speed/rpm
THanks! I generally run the Aureus around 500mm/min, 12 to 16rpm (depending on bit), 5mm passes.
It seems that the deeper cuts resulted in the start points being slightly rounded, or is that an optical illusion? hey google, translate this for me. Il semble que les coupes plus profondes aient entraîné des points de départ légèrement arrondis, ou est-ce une illusion d'optique?
Yes, it can be due to several things: bit angle not being exactly what is advertised by the manufacturer, Z axis not super-rigid. All this becomes more prominent when the cuts are deeper, unfortunately.
Paw paw has done a nose star on elease
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