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91
CamBam help (General usage) / Re: STEP Transform
« Last post by pixelmaker on November 15, 2022, 00:28:11 am »
The transformation matrix rotates all objects around their center axes. The objects must be joined before the transformation.
Ctrl+A to select all, then Ctrl+J to join the objects. Then you can do the transformation.
It is always better to upload the object.


ralf
92
CamBam help (General usage) / STEP Transform
« Last post by Chip Owner on November 14, 2022, 21:01:47 pm »
As my quest to understand STEP continues.

I've imported a STEP file which appears to be on the wrong axis.

Selecting 'all' then using the transform, on any axis, I'm only getting part of the file to change axis.

As in the attached image example.

 What am I getting wrong?

93
CamBam help (General usage) / Re: Delay for Vacuum
« Last post by chuckeroo on November 14, 2022, 13:28:15 pm »
As far as the park position the router needs to travel to Y+ which will allow me to remove the project from the bed and set up for the next project. I use Cambam and nothing else for the time being. By the way I had to change M9 to M8 before I had success with keeping the Vacuum running for the additional 10 seconds after the Router shut off. Thanks for the input.
94
CamBam help (General usage) / Re: Delay for Vacuum
« Last post by dave benson on November 14, 2022, 02:54:48 am »
Chuck
A word of caution.
If you put the Gcode, something like G53 X.position  Y.position Z.position
or G28 in the tool change portion of the post processor then if you then want to use Gcode
from another cam program say for example “fusion” in the future then you have to make or
modify fusion’s or whatever cam programs you use, post processor.

If you put the Gcode for the tool change position in the Mach3 tool change macro then the
Gcode from cambam or any other cam program just has to output, to change tool six
for example, “T6: M6”.

 However, if you just want to home the spindle during a manual tool change
and only ever intend to use cambam for your Gcode generator and you have limit
switches and you have homed the machine then you can put the Gcode in the cambam
post processor tool change section. G28 see pic

If mach3 is not configured to ignore tool changes then the spindle will raise to the
clearance plane stop rotating, go to the home position and wait for you to change the tool,
This positions the tool at the home position however, this may not be the most
convenient place to change the tool, maybe you want the spindle to move to the front
of the machine in the middle of the Y axis travel.

So, you want to park the spindle in some specified location ‘parking is not homing’
even though you can ‘park at the home position’ for use with linear tool changers or
manual tool changes where the home position is not where you want to do the tool change
use G53 which uses the machine co-ordinate system or G30.

Dave







95
CamBam help (General usage) / Re: Delay for Vacuum
« Last post by chuckeroo on November 13, 2022, 17:05:57 pm »
Seems like x and y positions must be represented in the footer also? Again Thanks for the help! Sooner or later I will get it just  like I need.
96
CamBam help (General usage) / Re: STEP files - MOPs
« Last post by Chip Owner on November 13, 2022, 14:15:23 pm »
I am using .step files on a daily basis.  CB ver. 1 import filter has some limitations (I guess it's not finished) but is useful enough. Sometimes it fails on reproducing more complex surfaces especially if there are geometry elements with active transformation matrix. But the wireframe imports OK.
What I do after opening a .step file is make a new layer named usually '3D', setting its color to a darker shade. Then using the 'Select by object type' plugin I select all 3D surfaces, then apply Ctrl+J (Join) and in the new layer I get a single 3D object with the wireframe in the other layer imposed over it.
Because those are machine parts, not containing some 'organic' shapes by selecting the needed geometry and copying them into yet another new layer; then joining them to closed shapes I obtain the geometry for 2.5D machining. Sometimes it needs some editing or adding polylines to get a closed shape. The 'Snappy' plugin is very handy in this case.
Here is an example - a .step file and a .cb file with a single solid 3D object plus wireframe.

This is a shape cut from a larger part which I cannot share.

Managed to play with this today and this is exactly what I was looking for.

Thank you.
97
CamBam help (General usage) / Re: STEP files - MOPs
« Last post by Chip Owner on November 12, 2022, 20:34:50 pm »
I am using .step files on a daily basis.  CB ver. 1 import filter has some limitations (I guess it's not finished) but is useful enough. Sometimes it fails on reproducing more complex surfaces especially if there are geometry elements with active transformation matrix. But the wireframe imports OK.
What I do after opening a .step file is make a new layer named usually '3D', setting its color to a darker shade. Then using the 'Select by object type' plugin I select all 3D surfaces, then apply Ctrl+J (Join) and in the new layer I get a single 3D object with the wireframe in the other layer imposed over it.
Because those are machine parts, not containing some 'organic' shapes by selecting the needed geometry and copying them into yet another new layer; then joining them to closed shapes I obtain the geometry for 2.5D machining. Sometimes it needs some editing or adding polylines to get a closed shape. The 'Snappy' plugin is very handy in this case.
Here is an example - a .step file and a .cb file with a single solid 3D object plus wireframe.

This is a shape cut from a larger part which I cannot share.

thanks I'll take a look.
98
CamBam help (General usage) / Re: STEP files - MOPs
« Last post by Dragonfly on November 12, 2022, 20:23:39 pm »
I am using .step files on a daily basis.  CB ver. 1 import filter has some limitations (I guess it's not finished) but is useful enough. Sometimes it fails on reproducing more complex surfaces especially if there are geometry elements with active transformation matrix. But the wireframe imports OK.
What I do after opening a .step file is make a new layer named usually '3D', setting its color to a darker shade. Then using the 'Select by object type' plugin I select all 3D surfaces, then apply Ctrl+J (Join) and in the new layer I get a single 3D object with the wireframe in the other layer imposed over it.
Because those are machine parts, not containing some 'organic' shapes by selecting the needed geometry and copying them into yet another new layer; then joining them to closed shapes I obtain the geometry for 2.5D machining. Sometimes it needs some editing or adding polylines to get a closed shape. The 'Snappy' plugin is very handy in this case.
Here is an example - a .step file and a .cb file with a single solid 3D object plus wireframe.

This is a shape cut from a larger part which I cannot share.
99
CamBam help (General usage) / Re: STEP files - MOPs
« Last post by Chip Owner on November 12, 2022, 19:49:39 pm »
My issue with .stp files in the past has been the resolution of the import and resulting meshes created. 

I tend to use a CAD program to clean things up because my customers tend to send me a lot of bad geometry.  My CAD program (not cheap anymore for a new user) imports .stp files with fewer errors than any other format.  I tend to think of .stp as the most portable format.  That being said some of the highest end most expensive CAD programs seem to export .stp files with artifacts that I have to remove. 

Anyway, after cleanup I export an STL file in a decent resolution for use in CamBam. 

You will find though in the world of industrial machining 3D CAD is the buzz word.  Some people ask, "Can you do 3D?" with the same slack jawed drool as others might ask, "Can it cut metal?" or in my particular industry, "Will it laminate?" 

There are a lot of parts I make for people where the ONLY use of the 3D model is to show them a pretty picture.  I just use 2D drawings to actually make the part because its faster and easier.  On the flip side of that... most of my work making organic or non simple geometric emulating organic molds for parts requires 3D for the basic cavity.  Even then modeling the entire mold in 3D would be a waste of time.  Surface plate = Draw rectangle.  Drill, chamfer, and thread mill hole = Draw a point.  Pocket a clearance area for hooks = Draw a closed polyline.  Profile the hinges = Draw open polyline.  Round over hinge bosses = draw a straight line. 

Thank goodness for Camotics and the Camotics plugin with its ability to create the model from the tool paths.  I've sent that image to customers more than once instead of telling them how I am really making their part. 

The biggest advantage to using .stp files in CamBam for most people is probably what David already said.  Clean real geometry lines, arcs, and curves.

I think I'm on your wavelength, they're just pretty pictures for people who can't visualise the end from a flat file, a bit like not seeing how a piece of paper might become a swan in the right hands.

I always ask for DXF's or better still just a sketch and I'll draw it. Luckily the most recent one is just a flat cut in acrylic. However, I'm trying to get my head round using them as one day...

I disagree.  They are not JUST pretty pictures.  A lot of the time they are pretty pictures, but sometimes (and for most of what I do) 3D is necessary.  I wouldn't know how to machine a compound curved surface without it.

Using a STEP file, how would you machine a compound curve?
100
CamBam help (General usage) / Re: STEP files - MOPs
« Last post by Bob La Londe on November 12, 2022, 19:30:41 pm »
My issue with .stp files in the past has been the resolution of the import and resulting meshes created. 

I tend to use a CAD program to clean things up because my customers tend to send me a lot of bad geometry.  My CAD program (not cheap anymore for a new user) imports .stp files with fewer errors than any other format.  I tend to think of .stp as the most portable format.  That being said some of the highest end most expensive CAD programs seem to export .stp files with artifacts that I have to remove. 

Anyway, after cleanup I export an STL file in a decent resolution for use in CamBam. 

You will find though in the world of industrial machining 3D CAD is the buzz word.  Some people ask, "Can you do 3D?" with the same slack jawed drool as others might ask, "Can it cut metal?" or in my particular industry, "Will it laminate?" 

There are a lot of parts I make for people where the ONLY use of the 3D model is to show them a pretty picture.  I just use 2D drawings to actually make the part because its faster and easier.  On the flip side of that... most of my work making organic or non simple geometric emulating organic molds for parts requires 3D for the basic cavity.  Even then modeling the entire mold in 3D would be a waste of time.  Surface plate = Draw rectangle.  Drill, chamfer, and thread mill hole = Draw a point.  Pocket a clearance area for hooks = Draw a closed polyline.  Profile the hinges = Draw open polyline.  Round over hinge bosses = draw a straight line. 

Thank goodness for Camotics and the Camotics plugin with its ability to create the model from the tool paths.  I've sent that image to customers more than once instead of telling them how I am really making their part. 

The biggest advantage to using .stp files in CamBam for most people is probably what David already said.  Clean real geometry lines, arcs, and curves.

I think I'm on your wavelength, they're just pretty pictures for people who can't visualise the end from a flat file, a bit like not seeing how a piece of paper might become a swan in the right hands.

I always ask for DXF's or better still just a sketch and I'll draw it. Luckily the most recent one is just a flat cut in acrylic. However, I'm trying to get my head round using them as one day...

I disagree.  They are not JUST pretty pictures.  A lot of the time they are pretty pictures, but sometimes (and for most of what I do) 3D is necessary.  I wouldn't know how to machine a compound curved surface without it. 
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