Hello All, Pretty new to CAM in fusion 360 and I had an issue where my router started the job 5 mils off of the work piece in both x and y. I have a custom machine I made using black box and xyz probe. I set the origin to the top and bottom left corner of the material with 2 mil to the model. I've looked around online and in fusion but didn't find anything. FYI Z had no issues and luckily those sides of the part didn't matter. Any help would be appreciative.
Did you enter the correct diameter for your endmill before probing? Or does the probe wizard not require that? I have not yet played with my XYZ probe in combination with OpenBuilds Control.
Yes I did have the correct one selected the wizard does have a box to select size of the bit.. This was my first go at fusion and my router. I have another item I'll be making later and will see if I have the same issue, I am hoping to get some pointers at things to look for either in fusion or G-code that may cause this kind of behavior..
Is that 5mils (thousands of an inch) or 5mm? The Interface wizard assumes accurate diameters at this time, if you use endmills that are underground too far that can affect things, as can flute angle. For super accurate probing, use a dowel pin
I am no longer proficient with Fusion 360 for CAM, so sadly I can't help there. However, there may be something wrong with an offset in your set-up.
If it's mm off it sounds as though the problem lies in your set up in Fusion cam. Post the file and one of us will be happy to have a look at it. Alex.
Well I ran my second project and didn't have the same issue. The only thing I know I did different was set the WCS to 1 on the first model and left it undefined on the second.
That shouldn't have made a difference - are you using the Openbuilds post processor? - that would set the wcs to G54 (1) if you left the wcs undefined in Fusion cam setup. I suspect you may have set up your stock in setup larger than your actual workpiece - worth checking that. I still forget things in Fusion cam after using it for nearly 3 years Alex.
Yes Alex I use the post processor but I modify the starting routine in G-code to turn on my cooler and dust collector with the coolant output and set a pause before the spindle starts, would be cool to alter the post for this in the future but that's another rabbit hole . I likely did something weird in Fusion since it was my first go around and had no clue what I was doing.
Not so much "doing something weird" - the default In Fusion cam assumes your stock is larger than the thing you have designed - it took me a while to get into the habit of changing that every time in cam setup. Alex. PS - tell us the code you are adding to your g-code header and one of us will tell you how to add it automatically to every g-code file.
When you post, change "has coolant" from no to yes. As long as you have coolant setup in your toolpaths, M8/M9 will be in your code.
Thanks Shamstr I do that I just don't like the order where it puts the command and I set a 10 second pause to allow the industrial cooler to boot up. Currently the post puts it after the start of the spindle and I like it before that.
If you select 'flood' in the Fusion Coolant options you will get a M8 coolant on code in your Gcode. You have to select this for each cut operation or default it on for the tool. Then you need to select 'has coolant?" in the postoptions And all this assumes you are using the Openbuilds GRBL postprocessor, of course Releases · OpenBuilds/OpenBuilds-Fusion360-Postprocessor (yes I just updated the coolant processing, but older versions will also work) oh yes, notice 2 lines above the pink arrow? spindle on/off delay can be set in seconds and will cause a pause after the spindle is turned on to wait while it gets up to speed.
hmmm, ok, get the latest post file and put it wherever you have Fusion finding it. make a copy of it. in the copy just move lines 785-791 to before line 739. select this copy of the post in Fusion why copy? so you don' loose this change in future updates so you have a working post for laser and plasma should you need it. the change above can sideeffect laser/plasma operation.
