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Author Topic: Steam Engine Name Plates  (Read 15024 times)

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Re: Steam Engine Name Plates
« Reply #10 on: November 25, 2007, 08:44:00 AM »
John there really excellent ,beats my efforts hands down.  The clarity is excellent .Lcam likes to leave a little flat on the top and bottom of G,O ect
what cutters are you using ? mine was home made in two minutes flat and was eager to see my machine in action "school boy Patience" after spending so long getting it up and running
i am new to cnc but not cad and have the solidcam anddon to my solidworks i will  have to sit down and try it out.will also have to have a look at Vcarve.
I am going to have ago at this next just to practice.
Is the TICH Name plate cast from  a cnc pattern?
« Last Edit: November 25, 2007, 10:00:30 AM by RobWilson »

Offline John S

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Re: Steam Engine Name Plates
« Reply #11 on: November 25, 2007, 10:30:41 AM »
Rob,
The credit isn't mine but V Carves.

The Llanfair badge was just copy pasted from text off the web [ you don't expect me to be able to spell this ?  :o ], brought into V Carve as text in New Times Roman, a box drawn round it and told to do internal radii and that was it.

The code went into Mach and it was cut using a home made 20 degree vee cutter like a D bit.

The Tich badge is CNC cut but it's been spay painted with wrinkle paint then linished when dry to give the cast effect.

Shoot me a DXF of your badge and I'll sent the code back so you can have a play.

John S.
Re: Steam Engine Name Plates
« Reply #12 on: November 25, 2007, 11:01:48 AM »
Cheers John
The cast effect looks real . i do some home foundry and was hoping to cnc some patterns to save on machine time and material.any ideas on pattern material?
thanks for the offer of doing the code in Vcarve so here's the DXF .
Rob

Offline John S

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Re: Steam Engine Name Plates
« Reply #13 on: November 25, 2007, 11:22:28 AM »


Should it really be 60 " long by 22" high or has the units get changed over in the DXF ?

John S.
Re: Steam Engine Name Plates
« Reply #14 on: November 25, 2007, 12:06:10 PM »
Hi John that was quick no 60mm by 22mm will check my settings . would it be better if i did it in inches?
« Last Edit: November 25, 2007, 12:16:33 PM by RobWilson »

Offline John S

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Re: Steam Engine Name Plates
« Reply #15 on: November 25, 2007, 08:13:29 PM »


Two files to cut this, first is with a 20 degree vee shaped D bit and it will cut 0.5mm deep
File is here.

http://homepage.ntlworld.com/stevenson.engineers/lsteve/files/rsw_engrave.tap

Next file is a 3 mm cutter to do the outer profile 1.1mm deep

http://homepage.ntlworld.com/stevenson.engineers/lsteve/files/rsw_profile.tap

First file takes 7 minutes 34 seconds and the profile takes 26 seconds

John S.
Re: Steam Engine Name Plates
« Reply #16 on: November 26, 2007, 10:11:36 AM »
John S,
Where do you get your 20 degree vee bits.   And why do you call it a D bit?    Good looking plaques. 
Dave
Re: Steam Engine Name Plates
« Reply #17 on: November 26, 2007, 11:45:18 AM »
John, cheers for the code i will post the results. i down loaded V Carve trial whats the limitations on the trial version?
thanks
Rob
Re: Steam Engine Name Plates
« Reply #18 on: November 26, 2007, 04:33:38 PM »
This is an interesting thread.
Thank you  Graham for the URL for local cutters (UK).
Thanks to Rob for the info on technique he used.

tmsmith
Re: Steam Engine Name Plates
« Reply #19 on: November 26, 2007, 06:21:10 PM »
John see what you mean about VCarve 3D Gcode  brillant its a first for me. the definition of the lettering is excellent.theres is bit un- machined under the engineering but hey no matter it's practices.
 ground up a propper cutter for this one instaed of the quick off hand one i used earlyer.had to so down the feed rate as my mill only dose 4300rpm what mill do you have which has 8000rpm?
i will have too redo my earlyer efforts.
Thanks Rob.
« Last Edit: November 26, 2007, 06:23:08 PM by RobWilson »