You bet bud. Change that inner circle to a pocket.
Right I can do that. But still, how will I cut out the piece? If i can’t do a cut like this then I’ve no hope of cutting anything out. I had this exact issue on the outside cut too.
Just re-ran the job again with the .nc file you sent me. Exact same problem once again. Videos recorded and uploading…
Ah, didn’t know the outside had created the same issue.
How deep is your cut? I ran it 0 to -6.8 I think.
Yeah thats what I just did, zeroed to the surface of the stock, cut down to -6.8. At that depth it should cut into the MDF a little, but it shouldn’t go crazy chattering like that.
I honestly don’t know what to do at this point.
Yeah the end Mill is whipping around. Is this on one of my collets?
I’ve tried two different collets now, I’m assuming the 4mm one that the machine came with (don’t know where else I got it), but these last two cuts were done on the Maritools precision collets. I’ve measured the runout and we’re down to < 0.001" now.
Hmm. I’m starting to get baffled as well now. All your gantry plates are the original.
Only thing thats outstandingly different about my build now is the TinyG G2v9 board. I have an older TinyG v8, considering ripping out the fancy and putting in the old one.
Here’s the video of the last cut with your .nc file. https://photos.google.com/share/AF1QipOyzxOaqj-sMEPbizZWsKCBoPZkybBc-LJ4NsmqmgB6HsTqyAlGz3KVVzQBN3KE7Q?key=SVBoeUZkNXk0YUdQLW5Ed3BEb2M4cWM3NGNzcG5n
For some reason my phone thinks its in portrait, all technology hates me today 
Just did two more tests. Cut a 40mm square, same thing. Tried another cut of the round here at 0.4mm doc, same thing.
@Brandon_Satterfield how do you have your machine secured to the table, and what sort of table do you have?
I’m wondering if its actually the machine resonating against the table.
Your not going to love this idea. I think you need to grab a 3/4" 4’x4’ sheet of MDF and slide it under the machine. Put everything on a perfect playing field.
2x4 frame, 2 qty 3/4" 4’x4’ MDF.
Its currently on a 3/4" plywood table top, with 3/4" spoilboard bolted to that. The spoilboard is split though, cut into strips with track in between. So I guess each bit of the spoilboard could separately be vibrating when the bit hits it. Seems unlikely given that each bit has 4 bolts into inserts in the table top.
I just grabbed each of the spoil board pieces, a couple of them do have a small amount of flex in them. I guess its possible they’re vibrating when the bit hits them.
Ah. Do me a favor, raise the work piece. Add a 3/4 or 1/2" MDF spreader underneath the work piece. The more it’s spread the better. I have never really worked below the machine surface. You are pushing the moment arm harder.
Ah… Good idea. I have a 3/4" 2x4’ MDF board I can try that with.