Red Special Guitar Aluminium Sheet Cut

Gallery of projects completed with MeshCAM

Red Special Guitar Aluminium Sheet Cut

Postby Doug » Fri Apr 07, 2017 11:56 pm

Here is a 13 minute video of a successful cuts of the aluminium switch plate and potentiometer/capacitor mounting plate for my Brian May Red Special replica guitar. Note that the screw hole drilling (2 passes only) is shown speeded up 8 x. I finished the drilling off later (not shown)

http://www.youtube.com/watch?v=vvjBx_inh0U

IMG_6113.JPG
IMG_6113.JPG (562.69 KiB) Viewed 390 times

http://www.youtube.com/watch?v=6P87CX_yd7w

Material: 1.2 mm thick 5251 H22 grade aluminium sheet.
Spindle: industrial HF spindle from StoneyCNC.
Feed rate: 1,000 mm/min
Plunge rate: 30 mm/min
Spindle speed: 7,500 rpm.
2 mm 2 flute solid carbide slot drill (REVERSE ROTATION).
12 passes at 0.1 mm depth per pass.

As you can see the aluminium granulates nicely and generates small mobile chips which clear easily with these conservative parameters. I suspect the Stepcraft system would cut quicker and with slightly greater depth per pass but I have no requirement to push the boundary on the small geometries associated with this project. I did not apply any compressed air cooling as you can see and there was little or no heat build up in either the stock or bit. That said, I did pause between the six pocket cuts to remove gum from the double sided adhesive tape and swarf from the end of the cutter with a cloth and isopropyl alcohol.

Regards.

Doug
STEPCRAFT 2/840 CNC machine with 4th axis, TurboCAD V19.2 Pro Platinum, MeshCAM, GWizard feeds & speeds calculator, UCCNC. Hobby use: guitar building (luthiery).
Doug
 
Posts: 51
Joined: Thu Oct 13, 2016 9:56 am

Re: Red Special Guitar Aluminium Sheet Cut

Postby Doug » Thu May 18, 2017 6:15 pm

This is another aluminium cut with exactly the same parameters as the previous post. This is a small potentiometer and capacitor plate today. Here is a short (normal speed) close up YouTube video of the cut:

http://www.youtube.com/watch?v=6P87CX_yd7w

Doug

Image
STEPCRAFT 2/840 CNC machine with 4th axis, TurboCAD V19.2 Pro Platinum, MeshCAM, GWizard feeds & speeds calculator, UCCNC. Hobby use: guitar building (luthiery).
Doug
 
Posts: 51
Joined: Thu Oct 13, 2016 9:56 am


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