Author Topic: Please help a new guy with a Gcode  (Read 5943 times)

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Offline nivlek

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Please help a new guy with a Gcode
« on: November 26, 2010, 02:07:25 AM »
Good day all
I’m very new here, so if you could assist it would be appreciated.

I have attached a dxf drawing which I wish to mill onto round pieces of aluminium.  The dxf will be milled onto the end of the aluminium, not the curve.

The diameter of the outside circle on the dxf is 67mm (2.63”) approximately.

I was hoping someone could create a Gcode using the following.

I am using a Taig mill running Mach3

Rough cut : End mill 1.5mm (0.06”)
Finish cut : Ball end mill 1.0mm (0.04”)
Depth of finish cut would be 3mm (0.118”)
Depth of roughing cut ??
Motor Speed : ??
Feed rate : ??

I would like to pocket the bull and the waves out to a depth of 3mm.
I would like to pocket the space between the shield and the outer circle to a depth of 3mm.

I would like the mach3 to start in the center of the outer circle.

Locate the Taig mill in the center of the aluminium and 0.0.0 it there. Then press go.

I have tried using Bobcad cam and Lazycam but have got different results. Not that I’ve come close to milling it yet.

What would be the simplest program to do this in.

Thanking you all in advance and I apologise if this is a dumb question as this is my first post

Regards
Nivlek

Offline Tweakie.CNC

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Re: Please help a new guy with a Gcode
« Reply #1 on: November 26, 2010, 02:50:23 AM »
Hi Nivlek,

Welcome to the forum.

First problem:  The wavy lines and parts of the bull's tail are narrower than 1mm when the pendant diameter is set at 67mm.

What parameters would you like to change to resolve this ?

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline nivlek

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Re: Please help a new guy with a Gcode
« Reply #2 on: November 26, 2010, 03:26:42 AM »
Thank you Tweakie,
Now I even feel dumber......
How silly was that, no wonder it wouldn't work.....

Ok I have re-scaled it again and made the outer circle 76mm (3") which is my maximum.

I think this is the best that I can do.

I expect the other way is to reduce the diameter of the mill bit which maybe a problem as I haven't got a smaller diameter mill bit at the moment.

Thank you so much if you could assist again Tweakie.
Regards
nivlek

Offline Tweakie.CNC

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Re: Please help a new guy with a Gcode
« Reply #3 on: November 26, 2010, 04:43:33 AM »
Hi Nivlek,

I have created 4 (very basic) toolpaths, 2 roughing with 1.5mm and 2 finish with 1mm endmills. These have not been tried (I am not the expert here as I usually work with wood and plastics) so you must adjust feedrates etc. to suit your material and machine.

Hope this may be of some use to you.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline nivlek

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Re: Please help a new guy with a Gcode
« Reply #4 on: November 26, 2010, 05:48:33 AM »
Thank you again Tweakie.
Could I just ask one more question and then I will try not to annoy the people reading this.

Which program did you use to generate the gcode ?

Regards
nivlek

Offline Tweakie.CNC

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Re: Please help a new guy with a Gcode
« Reply #5 on: November 26, 2010, 07:45:24 AM »
Hi Nivlek,

You are not annoying anybody - you ask as many questions as you like - this is what the forum is all about.
The GCode was generated with Vectric Aspire.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline nivlek

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Re: Please help a new guy with a Gcode
« Reply #6 on: November 26, 2010, 08:14:57 AM »
Thank you Tweakie

Regards
Nivlek