The post processor definition contains a number of sections. Each section can contain a mixture of literal text, which is output to the destination gcode file directly, and text macros of the format $macro. The macro definitions are defined within other sections of the post processor, or by defining user macros in the Post Processor Macros property of drawing's machining options. The macros are evaluated and the resulting text values are written to the gcode output.
Defines how each item of the $tooltable macro is produced. Tool tables are typically inserted in the header of a file and contain commented text describing the list of tools that will be used in the gcode file.
Controls how arcs are output to gcode.
If Convert To Lines, small line moves are used rather than arc commands.
Helix Convert To Lines is similar to Convert To Lines, but only for helical arcs (i.e. arcs with varying Z).
For lathe operations, this should usually be set True. Lathe arc directions are typically relative to the 'Up' direction.This would imply a positive Y axis using a left hand coordinate system. CamBam's drawing view is a right hand coordinate systemso XZ arcs would need to be inverted when written to g-code.
It can also change the gcode instructions that are required. For example, if a toolpath contains a move from X=1.234 to X=1.233 and a number format of #.#0 is used, no move instruction will be written to the gcode as the coordinates are identical when formatted to 2 decimal places.
The post processor will parse gcode as it is created to update internal values such as registers. This can produce error messages for post processors that producenon-standard gcode. In many cases the gcode will still be correctly generated and the error messages can be ignored.
Post-Build Command Args contains any arguments to pass to the application.
The following macros are recognised:
$outfile is the filename of the raw gcode output.
$cbfile.name is the short name of the current CamBam document.
These Gcode macros control how the gcodes are output. The format of each code is taken from the G... definitions in the post processor. This may be useful to control zero padding (eg G1 vs G01), or to use alternative G codes.
If the underscore (_) prefix is used, these instructions are assumed to be modal (or sticky). That is; the first occurrence of the code will be written but omitted if following blocks use the same instruction.
These macros insert the parameters used in common Gcode move operations. If an underscore (_) prefix is used, these parameters are treated as modal. That is they will only be output if the current value has changed. Omitting the underscore will force the parameter to be always output.
Even after the evaluation period has expired, you can continue to use CamBam to edit drawings and test your post processors and g-code, however g-code output will be limited to 1000 lines and scripts and plugins will be disabled.
CamBam is an application to create CAM files (gcode) from CAD source files or its own internal geometry editor. CamBam has many users worldwide, from CNC hobbyists to professional machinists and engineers.
Download CamBam now to provide 40 free and fully functional evaluation sessions. After this time CamBam will still produce around 1000 lines of gcode so you can continue to evaluate and run small jobs.
This tutorial describes using the Heightmap plugin to generate pseudo 3D profiles from bitmaps. The same routine can also be used to generate photo engravings in two-toned materials and lithopanes. The source code for the heightmap plugin is also provided with CamBam for the adventurous.
Warning: The Heightmap plugin can produce gcode that plunges the full depth of your heightmap in one go.The engraving machining operation now supports a Depth Increment property that can be used to machine deep height mapsin multiple passes. Another alternative is to use the Draw - Surface - From Bitmap operation to create a 3D surface meshwhich can be used with the 3D machining operations.
A lathe profile can be generated from a 2D line representing the shape to machine. The shape should be drawn so that:
The lathe +X axis is drawn in the -Y direction and
The lathe +Z axis is drawn in the +X direction.
This is so that the drawing will appear in the same orientation as when standing in front of a conventional lathe.
The toolpaths will be converted to standard lathe X and Z coordinates when the gcode is produced.
Normal is the preferred setting and will use G2 and G3 codes to output arcs. Convert To Lines may be used as a last resort if CamBam can not generate arc codes in a format compatible with the destination controller. Convert To Lines is used with the Arc To Lines Tolerance property, where smaller tolerances will result in smoother curves but larger files.
For example. CutViewer Turn recognises a gcode comment that defines the geometry of the lathe tool in the following format:
TOOL/STANDARD,BA,A,R,IC,ITPRefer to the CutViewer Turn documentation for details of this description. Here is a summary of the parameters:
I have found that UGS defaults to metric (assuming you are using inches). I have to switch from inches to metric then back, rehome and it seems to work ok.
SO far I like it better than Easel because Easel has a real issue with where the work zero is. It wants to go somewhere off the machine.
Easel is not bad but very limited.
I have found GWizard Editor for creating the G code because it shows you the path the tool takes for eack move , points out errors and generates a clean G code. UGS takes it from there.
Try it, best thing out there.
Unfortunately, nothing could be further from the truth of how CAM software works. I have never seen a single CAM package that will do what the beginner expects, but some are easier than others. Think of your CAM software as being a helpful assistant that has to ask you a lot of questions before it can get on with doing the job of producing your g-code. Usually, the more sophisticated the CAM package, the more questions it wants to ask.
Recently, my computer has started to bluescreen while I'm gaming with the WHEA UNCORRECTABLE ERROR and no error code. I'll paste the resulting Event Viewer XML below. As far as I can find online, it is a hardware problem. I have tried AIDA 64 Stability test on the CPU with no problem, furmark for ages and the GPU seems fine. Memtest for 30hrs with no issues. I have tried a different ssd for a couple days and there were no bluescreens but when i switched back to my original ssd, the bluescreens didnt return, for a couple days at least. The last thing i was able to test is removing a pcie riser cable. It seems to be running fine now but im sure the bluescreens will start again. Does anyone have any ideas on what else i can test and if there is any more information i can provide please let me know/ thanks,
I am using CamBam 0.98 but I have tried the 0.97 processor and the new 1.0 with the same results.
I will try your fix to see the results but I would prefer not to have to modify the code for each change. The total project is over 5000 lines.
@gero I tested it with the Y value added and it still made the bump. It looks to me like it is carving the wrong arc of the circle. Line 140 is a simple move (G1) but 181 is an arc (G3). I can look at the other places in the code where there are bumps and see if it is the same command with a small move.
When this happens, the start and end point of the arc are the same (and with the
limits of single precision math in the arduino, this happens once in a while
even when the g-code has different positions)
There are some situations where you might want to perform some more advanced analysis on your G-Code or link with your own programming. Perhaps you are using the code as part of a research project or you are developing your own 3D printer.
Thank you both, @eelik and @qu1ck! I appreciate the gerber spec excerpt. I felt I learned enough about the problem and was seeking algorithmic solutions and upon review of options decided that the Clipper library was going to be useful. Then I looked at the KiCAD source code and, of course, the KiCAD developers needed the same functionality.
CamBam is a CAD / CAM application designed to take common CAD files such as DXF and 3DS, manipulate drawings using CamBam's internal geometry engine then produce tool paths and gcode for CNC machines. Some key features include:
- 2.5D profiling and pocketing.
- Toolpaths from True Type (TTF) Text.
- Fully scriptable using VBScript or JScript.
- Some 3D support is appearing.
- The application is extentable by user written addins written in a variety of .NET supported languages include C/C , C#, Visual Basic.
- Bitmap to heightmap included for rudimentary 3D machining from photographs.
I appreciate the comment. Nothing worse than getting so close to finishing a project and one little setting is keeping it from working. I have never used CAMBam or Chilipeppr, however, I did not need to make any changes in my GRBL settings to run a gcode program. Have you tried running the sample circle code from the GRBL GitHub site? -Code-Examples Scroll all the way to the bottom of the page. Copy and paste the gcode into a text editor and save as a .nc file. Try opening this and running it with Chilipeppr. If it works, we know there is something that needs to be adjusted in CamBam. If my explanation of the .nc file creation was not clear, just send an e-mail to me T...@diymachining.com and I will reply with the file attached. Let me know how it goes.
Hi I want to make a cnc machine the can use a pump to pour batter.
My question is is there a way or what build do you recommend I want it to do the same thing over and over again. Is there a way to store gcode on the arduino and make so a push button will send the code and make it do the work.
I plan on making a t bot as it will have to hand over hot out (funnel cake robot )