My problem is that when my cnc cuts aluminium, when it do the tabs for subject the piece, in the falling step my cnc ever makes a vibration:
0 level->move up 2mm->making the tab 2mm->falling down, in this point vcarve make it too fast and my cnc makes a noise and a vibrations then the part in this point ever have a scracth.
I solved it setting the speed of down movement in a 0.25mm/s with this setting it works fine but it waste a lot of time for make the parts.
How do you do for cut the aluminium parts?
how cut aluminium?
- IslaWW
- Vectric Wizard
- Posts: 1398
- Joined: Wed Nov 21, 2007 11:42 pm
- Model of CNC Machine: CNC Controller Upgrades
- Location: Bergland, MI, USA
Re: how cut aluminium?
The trick with aluminum is to have a rigid machine with decent horsepower and "let 'er eat". Most of the time I would use 12-15Krpm using a single "O" flute at 90 in/min (38mm/sec) at .080-.090" (2mm+) per pass
That said, you will always get some chatter when plunging down into aluminum. Yes, around every tab. The stiffer the frame, the less deflection. Less, never none.
Look at around 2 minutes into this video and you can see the tabs cutting. At 4:10 you can see some chatter induced by ramps into the next pass
That said, you will always get some chatter when plunging down into aluminum. Yes, around every tab. The stiffer the frame, the less deflection. Less, never none.
Look at around 2 minutes into this video and you can see the tabs cutting. At 4:10 you can see some chatter induced by ramps into the next pass
Gary Campbell
GCnC Control
ATC & Servo Controller Controller Upgrades
GCnC411 (at) gmail.com
GCnC Control
ATC & Servo Controller Controller Upgrades
GCnC411 (at) gmail.com
- Jim_in_PA
- Vectric Craftsman
- Posts: 270
- Joined: Wed Jan 10, 2018 3:24 am
- Model of CNC Machine: Camaster Stinger II SR-44 (MacOS user)
Re: how cut aluminium?
Gary, would using a 3D (ramped) tab help with this material since the "plunge" is then gradual in either direction while the machine keeps moving?
- IslaWW
- Vectric Wizard
- Posts: 1398
- Joined: Wed Nov 21, 2007 11:42 pm
- Model of CNC Machine: CNC Controller Upgrades
- Location: Bergland, MI, USA
Re: how cut aluminium?
Jim...
Other than when I use a standard tab to lift and miss a vise jaw or similar (shown in video) I always use 3D tabs (also shown). There are also examples of ramping to pass depth. In each and every case when the bit plunges is there is chatter. You can hear it and see it.
Other than when I use a standard tab to lift and miss a vise jaw or similar (shown in video) I always use 3D tabs (also shown). There are also examples of ramping to pass depth. In each and every case when the bit plunges is there is chatter. You can hear it and see it.
Gary Campbell
GCnC Control
ATC & Servo Controller Controller Upgrades
GCnC411 (at) gmail.com
GCnC Control
ATC & Servo Controller Controller Upgrades
GCnC411 (at) gmail.com
Re: how cut aluminium?
I want the machine of the video, my machine is a diy for wood and a litle aluminium
Thanks for the info.
Thanks for the info.
- IslaWW
- Vectric Wizard
- Posts: 1398
- Joined: Wed Nov 21, 2007 11:42 pm
- Model of CNC Machine: CNC Controller Upgrades
- Location: Bergland, MI, USA
Re: how cut aluminium?
I build my machines too. All the machines shown on my YouTube page: https://www.youtube.com/user/Islaww1/videos
are machines that I have build or modified.
are machines that I have build or modified.
Gary Campbell
GCnC Control
ATC & Servo Controller Controller Upgrades
GCnC411 (at) gmail.com
GCnC Control
ATC & Servo Controller Controller Upgrades
GCnC411 (at) gmail.com