I’ll try manually creating 90 and 180 degree segments to see if that changes things.Īs an aside, my laser also doesn’t fire properly on these moves - just gives a little blip at the start. Nothing wrong with that, but perhaps it’s an edge case that trips things up. The only thing slightly odd about the generated gcode is that CamBam will split a complete circle into 3 arcs of 120 degrees when generating the gcode. (Perhaps I’ll move this to its own thread once I’m sure it’s not CamBam related.) I’ll spend a little longer poking this over the weekend and then I’ll post the exact gcode and my settings to see if anyone else can replicate it. If process them as a file then it all starts to go weird. I seem to have tracked it down to the fact that if I run the lines of gcode that CamBam has generated one at a time via Pronterface then it works fine. CAMBAM POST PROCESSOR SOFTWAREHowever I’m fairly sure this is not the case. Main page for CamBam CNC software, best value for money, feature rich, CNC Software for G-Code generation on CNC Routers, CNC Mills, Homemade CNC machines (Home made CNC machines), for 2D pocketing. If you ever get odd circles then arc centre mode is usually the culprit. My initial suspicion was the gcode that CamBam generated - things like arc centre mode settings, etc. I’m also having issues with circles generated by CamBam starting out well but then becoming triangular. I have had reasonable results using V bits (60° 0.2mm) but I’m still experimenting. I’ve tried end mills from 0.5mm and 1mm but I keep snapping them. STEP4 – In Pronterface load the files produced in Cambam (.nc files) for etch/trace and hole files you can recombine these files to one in Cambam if that is easier. When happy you can produce gcode for edited board. If you want to edit the tap file in Cambam, open file, Right click on machining tab and select “Toolpaths to geometry” this converts the traces to polylines which can be edited as you like. You can set machining properties within PCB-GCODE but I didn’t. You then select the machining parameters and produce toolpaths and gcode. If you open the bottom etch file, for example, it will show the tracks to be cut. tap files which I couldn’t get to open in Pronterface, so I used Cambam. STEP 3 – The files produced in Step 3 are. I think it produces top and possibly other layers also but I haven’t tried. For a single sided board it will create a file for bottom etch and file for holes. When board is finished you run PCB-CODE from within Eagle it produces the Gcode files. CAMBAM POST PROCESSOR HOW TOIf you go on Youtube there is an excellent tutorial by a guy called Matt Westwick which explains how to get, install and use the PCB-GCODE software. From 3 Axis Mills to 5 Axis Mill-Turns & more, ICAMs CNC post-processors allows manufacturers to generate reliable G-Code quickly and effectively. If you, or anybody else, wants to try yourself I will explain how I did it, but I will say now I’m no expert, this worked for me but there are probably much easier ways.
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