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Topics - cncorbust

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1
General Mach Discussion / Win 7 and Win 10
« on: August 24, 2015, 03:20:07 PM »
I am aware that it is a forlorn hope that Mach 3 will work with win 10 when expecting to drive motors etc.   Will mach 3 work in win 10 as it does now in XP and WIN 7 without connection to any ports?  I use my office computer (WIN 7) to verify tools paths etc, it has no connection from Mach to the outside world. It works well in this configuration. I would like to run Mach 3 in WIN 10, is there any hope of doing this?

An extra. Can a win 10 install be reversed to a previous win install?

Mike

2
Didn't want to hi jack some one elses post on small size engraving but thought this might be of interest to any one wanting to see how small one can one go with the inverse of engraving (embossing?).  I'm sure with the right equipment it is possible to go smaller but what I am showing is about my smallest limit.

The picture shows an embossed (raised lettering) of a plaque for a 1/2" scale model of a steam loco I am building.

I made the cutter from 1/8" round tungsten carbide. I ground the stock down to a 60 deg point, with the point as dead center as possible. I then changed the angle of the stock from 30 degs from the diamond stone surface to 60 degs. As carefully as possible I moved the tip into the grinding surface to a depth of 0.001" (not really sure if I achieved the 0.001" depth, I don't have the tools to be sure. I did try 3 times!). This puts a flat surface that retains curvature at the tip of the point with a slight offset. In effect it produces a very small round nose cutter. The cutting is done using a raster cut with Gcode derived from a high contrast image of the lettering on the plaque.  With an X step over of 0.001" and Y resolution of 0.001"  and 3 passes to a depth of 0.005" the result is quite surprising.

Mike

3
This is a CNC carving 7" by 7" Routed out in light Oak. The colour was a pretty good match for the subject colour.
Made from a grey scale image much modified to make sure that the depth of cut was consistent with how deep or high the surface
should be to properly represent the relief.

It was an early attempt to use my newly fabricated machine which at the time had  utiility 1/2" by 20 lead screws.

Mike

4
Would anyone care to guess the size of this item?

Mike

5
The attached photos show a golden anniversary gift.  The images were processed from grey scale photos. The greyscale was modified to correct for proper depth of cut (The images look horrible after this process). The processed images were then passed through a raster to Gcode generator (DeskCNC). The Gcode was then passed to my 12" by 8" home brew CNC machine. The carving was done using jewellers wax. The images are double sided.  The carved wax pieces were then cast in 18ct gold using a lost wax process. The surrounding heart was also carved in wax but using convetional 3d CNC cutting. The resulting gold pieces were then assembled and mounted on polished Labradorite, it represents our homeland of Newfoundland. The labradorite is mounted on a block of acrylic to represent an iceberg. The lettering was done on the CNC machine. To make the wax carving I ground my own cutter, it worked surprisingly well.

Mike

6
LazyCam (Beta) / LazyCam, post and other questions
« on: April 07, 2008, 04:26:42 PM »
I finally found out how to post (the "new" post button is real small on my monitor)
I did post questions re Lcam on the Yahoo group and normally a responce is real quick but it
seems the guys over there are very busy discussing Acceleration, newtons, g forces
and the relative merits of same in 3D milling.

That post went as follows:

Is there a way to cancel the default post processor? I don't need the
G91.1, M9, G41 H3. I'm growing tired of editing those items out.

Also Lcam likes to insert a move to safe height at the end of each
pass through a multipath depth cut, why? again I am growing tired of
editing out this move.

Is there any further development happening with Lcam. I find a number
of irritating foibles with it which I know could be corrected and
make the Lcam even better than it already is.

I find that there are too many different places and screens that must
be visited so as to complete all of the information required to get a
good tool path. It's just too easy to make a mistake or forget to
enter all the info.

I'm no expert in CNC machinging but I worked in other areas where
human input is required, parameter inputs were always kept in one
place and usually kept in a logical sequence. Why is it still
required to enter a tool diameter in the offset screen and yet still
have to separately enter a tool in the tool window, would this not
normally be the same diameter as that use in the offset window?
Perhaps this is something to do with the use of offsets setup by appropriate G codes
 (Instructions in a manual would likely help here).

Has any one compiled a basic listing of how to setup Lcam? How does
one set up a personal safe height that Lcam defaults to rather than have
to accept the 1.0000 it now insists on presenting, is there a place
to change this?

How does one write ones own post processor, what is the format of a
post processor? Is it proprietry?

I bought a pro license sometime ago, the outlook for Lcam looked
pretty good then but progress appears to have stalled. I've had license for Mach for over three years .

I'm just hoping I will be able to navigate back to this thread to pickup any answers.
I'd much rather be unravelling some brass than wrestling with the labarynth of links
required to get around the internet to get answers. Once again a manual (hint hint) would be real peachy.

Mike



7
LazyCam (Beta) / Offsets not generated correctly
« on: January 08, 2008, 08:44:17 PM »
I am trying to generate 1/32" offsets from the attachedĀ  AcadR12 LT2 DXF file (Temp.dxf). The result I get is as shown in the attached BMP file (Offseterrors.bmp). It shows that the offsets are not continuous and are infact jumping from inside to outside. I have not had this problem before and just tried an older file and get the same unuseable result.

I know the lines are continuous ie the chain is not broken into separate segments or at least it is not broken in the DXF file, I verified this by taking the chain back into Acad and converting the line to a poly line.

I have not used LazyCam extensively but I have been able to get offsets to work in the past.

Mike

8
LazyCam (Beta) / Offsets not generated correctly
« on: January 08, 2008, 08:36:56 PM »
I am trying to generate 1/32" offsets from the attached  AcadR12 LT2 DXF file (Temp.dxf). The result I get is as shown in the attached BMP file (Offseterrors.bmp). It shows that the offsets are not continuous and are infact jumping from inside to outside. I have not had this problem before and just tried an older file and get the same unuseable result.

I know the lines are continuous ie the chain is not broken into separate segments or at least it is not broken in the DXF file, I verified this by taking the chain back into Acad and converting the line to a poly line.

I have not used LazyCam extensively but I have been able to get offsets to work in the past.

Mike

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