How do i make a simple hole (AutoCAD / DXF2Gcode)

  • andrei
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07 May 2011 20:24 - 07 May 2011 20:25 #9636 by andrei
Hello. I am new to EMC2 and everything related to it (except 2D CAD designing). First i would like to tell you that i have good knowledges on AutoCAD.

I just want to make a few holes with my CNC but it seems i can't manage to do so. I tried to make a filled donut (having 0 diameter) in AutoCAD but the DXF2Gcode converter will see my dot as circle, then i tried to only make 'points' in AutoCAD but it seems that DXF2Gcode knows nothing about 'points' and will show nothing on my screen.

Please enlighten me, what do i need to draw in AutoCAD to import in DXF2Gcode to make some simple holes in a wooden plank ?
Last edit: 07 May 2011 20:25 by andrei.

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07 May 2011 21:19 #9638 by PKM
It depends on which tool you choose. If you use a drill to make a hole, it needs axial feed only. If you use a mill, you rather need a circular path.

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07 May 2011 21:32 - 07 May 2011 21:37 #9639 by andrei
I'm using a drill, and i need to make a few specific holes. I just need to drill through the wooden plank by my draw. I know how to adjust the CNC but i don't know how to make it to make a few specifically designed holes. I know how make the drill to draw lines and everything but i don't know how to get the machine to make a simple dot.
Last edit: 07 May 2011 21:37 by andrei.

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07 May 2011 21:50 - 07 May 2011 21:51 #9640 by PKM
Why don't you write gcode yourself, it's very simple for 5-10 holes. Something like
G21
G0 X0 Y0 Z0
G0 Z-5
G0 X10.5 Y15
F100
G1 Z-15
G1 Z-5
G0 X15 Y20
....
etc for each hole
....
M02
Last edit: 07 May 2011 21:51 by PKM.

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07 May 2011 21:52 - 07 May 2011 22:07 #9641 by andrei
Actually i have 325 holes. I have to use the AutoCAD, there is no other way. The holes must be made in a specific way by some specific dimensions/rates, not random. I have to go by a specific drawing.
Last edit: 07 May 2011 22:07 by andrei.

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07 May 2011 22:08 #9643 by PKM
You said "a few" and I thought it's less then 325 =)

www.timeguy.com/cradek/autocad
I guess this should help

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07 May 2011 23:04 - 08 May 2011 00:51 #9645 by andrei
I get this error
Error: bad argument type: lentityp nil

i do not fully understand how is this script working. I read the instructions carefully, but i do not manage to make it work.
;; The layer of the drawing entity determines the drill or mill
;; description.  Entities on layer 0 are ignored.
;; 
;; The x and y work in the obvious way.  The z dimension determines the
;; cutting depth.  Therefore the z of all entities NOT on layer 0 must be
;; negative.
;; 
;; All cuts made with a particular tool are made in least-depth-first
;; order.
;; 
;; Tools are used in decreasing alphabetic order, so if you have paths on
;; layers named 250-MILL and 125-MILL, it will ask for the 1/4" before
;; the 1/8".
;; 
;; A text of the form "vfeed: [real number]" or "hfeed: [real number]" on
;; a tool layer will set the vertical/horizontal feed for that tool.
;; 
;; A text of the form "peck: [real number]" on a drill layer will set
;; the increment for a peck drill cycle.
;;
;; A text of the form "chip: [real number]" on a drill layer will set
;; the increment for a chip breaking drill cycle.
;;
;; A text of the form "tap: [real number]" on a drill layer will set
;; the thread pitch for a tap cycle.
;;
;; A text of the form "dwell: [real number]" on a drill layer will set
;; the dwell at the bottom of the drill cycle.
Last edit: 08 May 2011 00:51 by andrei.

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08 May 2011 05:42 #9648 by stevec
If you just want to do a quick one off job for the moment, take a look at www.cambam.info/ .
There is a 40 try demo version which has its own drawing facilities, or it will import DXF files as well.

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08 May 2011 08:13 #9650 by cncbasher
post your dfx file

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08 May 2011 10:04 - 08 May 2011 13:16 #9651 by andrei
I've uploaded the DXF file, thank you for your support. If there is someone who knows how to use this REALIZE.lsp script with AutoCAD i would be more than grateful. I work as a Surveyor and i only know how to draw 2D in AutoCAD. I cannot use other CAD/CAM softwares due to the lack of features and flexibility.


Attachment OnlyPoints.dxf not found



and

Filled Circles:
www.mediafire.com/?criibq7qceeqt3b
Attachments:
Last edit: 08 May 2011 13:16 by andrei.

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