Engraving Al questions.

This forum is for general discussion about Aspire

Engraving Al questions.

Postby Gundawg » Fri Aug 18, 2017 10:56 pm

I am going to start engraving some of my parts made from 6061 T6 extrusion. I have an engraving bit from Bits & Bits that is for engraving with a 70* angle and a .005" tip. Can anyone recommend a speed and feed to get started? My spindle has 24000 RPM. I would also like to fill the engraved font with a color any suggestions on this as well method and type of paint or ink? I had some speed and feed info at one time but I can't seem to find where I wrote it down.

Thanks Mike
Gundawg
Vectric Apprentice
 
Posts: 81
Joined: Sat Nov 30, 2013 12:27 am
Model of CNC Machine: ShopSabre IS 510 / Trak DPM Bed Mill

Re: Engraving Al questions.

Postby Gundawg » Sat Aug 19, 2017 12:50 am

I ran a couple tests they cam out about the same they are passable but could be better. I ran the first test @ 12000 RPM 18 IPM feed and .005 depth per pass 2 passes.

20170818_160719.jpg
12000 RPM 18 IPM feed and .005 depth per pass 2 passes


The second test I doubled up speed and feed the results came out about the same.

20170818_163608.jpg
24000 RPM 36 IPM feed and .005 depth per pass 2 passes


I would like to smooth this out any suggestions? Am I feeding too fast or going to deep per pass?
Gundawg
Vectric Apprentice
 
Posts: 81
Joined: Sat Nov 30, 2013 12:27 am
Model of CNC Machine: ShopSabre IS 510 / Trak DPM Bed Mill

Re: Engraving Al questions.

Postby highpockets » Sat Aug 19, 2017 1:39 am

John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1282
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Engraving Al questions.

Postby FixitMike » Sat Aug 19, 2017 1:43 am

Try spraying a little WD40 on the aluminum before cutting. If this was being done on a mill, a spray mist would be used.
Good judgement comes from experience.
Experience comes from bad judgement.
User avatar
FixitMike
Vectric Wizard
 
Posts: 1204
Joined: Sun Apr 17, 2011 5:21 am
Location: Renton, WA USA
Model of CNC Machine: Shark Pro Plus (modified)

Re: Engraving Al questions.

Postby IslaWW » Sat Aug 19, 2017 1:59 am

Mike...
Test a few different bits. Whiteside has a nice 60*. This was done with a Centurion 1/4" 60* as a VCarve. (about .020-.030 depth, 1 pass) Using mist

"hi tech" rustoleum black rattle can and a 400 wetsand on a rubber bloack
Attachments
Sideplate.jpg
Gary Campbell
CNC Technology & Training
Control & ATC Retrofits
GCnC411 (at) gmail.com
User avatar
IslaWW
Vectric Wizard
 
Posts: 849
Joined: Wed Nov 21, 2007 11:42 pm
Location: Marquette, MI, USA
Model of CNC Machine: SideWinder ATC & CNC Mill on WinCNC

Re: Engraving Al questions.

Postby Gundawg » Sat Aug 19, 2017 2:37 am

That looks good Gary. I have an MQL mist system on my router and I was running it so it had oil. I may try some different bits the one I am using was designed for engraving.

Thanks Mike
Gundawg
Vectric Apprentice
 
Posts: 81
Joined: Sat Nov 30, 2013 12:27 am
Model of CNC Machine: ShopSabre IS 510 / Trak DPM Bed Mill

Re: Engraving Al questions.

Postby aifeliciano » Wed Sep 20, 2017 6:34 am

Gundawg wrote:
20170818_163608.jpg




May I ask what font and type of toolpath did you create to get the "stick" font shape?
aifeliciano
 
Posts: 6
Joined: Tue Sep 12, 2017 8:26 pm
Model of CNC Machine: CNC Router Parts PRO2448

Re: Engraving Al questions.

Postby martin54 » Wed Sep 20, 2017 12:52 pm

If your testing then you need to run different speed & feed settings, doubling both speed & feed is pretty much doing the same thing just a bit quicker so there won't be much difference between the two :lol: :lol:

Manufacturers recommended settings for speed & feed should be your starting point for fine tuning, check your suppliers website or if you know the manufacturer of the bits then try their website :lol: :lol:

If your testing then try running a constant speed & change feed setting or run a constant feed & try different speed settings :lol:
User avatar
martin54
Vectric Wizard
 
Posts: 3277
Joined: Fri Nov 09, 2012 2:12 pm
Location: Crossgates, Scotland
Model of CNC Machine: Gerber System 48 (modified)

Re: Engraving Al questions.

Postby Adrian » Wed Sep 20, 2017 4:33 pm

aifeliciano wrote:
May I ask what font and type of toolpath did you create to get the "stick" font shape?

If you select the Single Line font option in the Text Tool you'll see those fonts.
User avatar
Adrian
Vectric Archimage
 
Posts: 7421
Joined: Thu Nov 23, 2006 2:19 pm
Location: Surrey, UK
Model of CNC Machine: ShopBot PRS Alpha 96x48

Re: Engraving Al questions.

Postby aifeliciano » Wed Sep 20, 2017 9:53 pm

Adrian wrote:
aifeliciano wrote:
May I ask what font and type of toolpath did you create to get the "stick" font shape?

If you select the Single Line font option in the Text Tool you'll see those fonts.


Ok got it. None of the single line fonts available match my mil-spec TTF font. whats the "easiest" way to engrave a TTF without cutting the outside and inside lines?
aifeliciano
 
Posts: 6
Joined: Tue Sep 12, 2017 8:26 pm
Model of CNC Machine: CNC Router Parts PRO2448

Re: Engraving Al questions.

Postby Adrian » Thu Sep 21, 2017 1:33 pm

Depends on what the look you're going for is. If you want it to look like a single line font then you're going to have to create it yourself by offsetting, node editing etc or install a font into Windows that looks the way you want such as these - http://www.mrrace.com/CamBam_Fonts/ - or the other commercial ones that are available. Note that those fonts will appear in the TrueType list as they are not true single line fonts (no truetype/opentype font can be).
User avatar
Adrian
Vectric Archimage
 
Posts: 7421
Joined: Thu Nov 23, 2006 2:19 pm
Location: Surrey, UK
Model of CNC Machine: ShopBot PRS Alpha 96x48

Re: Engraving Al questions.

Postby Chuck Keysor » Tue Sep 26, 2017 6:03 am

Mike, this is a semi-dumb question,,,,,, but what is the height of your letters? Are they .1" high, or .8" high?

I haven't engraved aluminum, but when I have engraved other materials, the smaller the letters, the worse my results, which is fairly intuitive. And are Gary's letters 2" high? It would seem that without knowing how tall your characters are, and how tall his are, it would make it hard to evaluate and/or compare results.

But I am interested in seeing how much improvement you can get by following forum suggestions, so thanks for bringing this up. Chuck
Chuck Keysor
Vectric Apprentice
 
Posts: 66
Joined: Tue Mar 02, 2010 6:27 am
Location: Elgin, Illinois
Model of CNC Machine: Shopbot PRT alpha 60 x 148

Re: Engraving Al questions.

Postby Mike-S » Tue Sep 26, 2017 2:17 pm

Not aluminum, but shows what is possible. Done with a CMT 60 deg Laser Point.
Attachments
penny.jpg
User avatar
Mike-S
Vectric Wizard
 
Posts: 953
Joined: Mon Jun 13, 2011 6:45 am
Location: Hayesville, NC
Model of CNC Machine: Joe's Hybrid 4x4 (but 3x3)

Re: Engraving Al questions.

Postby Chuck Keysor » Tue Sep 26, 2017 5:24 pm

Thanks Mike for the added information. With the added size information, I can tell you are up against a tough challenge. With that small size, even my camera has a hard time taking a good picture. The CMT laser point is my favorite engraving bit.

I think I got discouraged with my tiny engraving efforts when a friend of mine burned my test file with his flatbed laser engraver! (I have a Shopbot PRT alpha 60 x 144 with a 5 HP spindle.)

I wonder if you may be at the physical limits of your machine's ability to hold steady enough to cut such fine letters? I hope someone else can shed some light on that question, as I really am interested in such small engraving. Maybe your easiest path to making better looking letters would be to make them larger..........

Thanks, Chuck
Chuck Keysor
Vectric Apprentice
 
Posts: 66
Joined: Tue Mar 02, 2010 6:27 am
Location: Elgin, Illinois
Model of CNC Machine: Shopbot PRT alpha 60 x 148


Return to Aspire - General

Who is online

Users browsing this forum: Bing [Bot], BrianM and 15 guests