Part 0002 finished

I did Part 0002 again with no mistakes.
The chamfer is about 0.2mm under size. I don't think this will be a problem.

Part 0002 again

Only one mistake, this time. The chamfer was too big. I worked out what I did wrong. I wanted to offset the path 1mm from the part, so I told the software it was using a 1mm slot drill. I should have told it it was a 2mm slot drill. The chamfer is 3.8mm instead of 3mm. I left on 0.2mm for safety, but it was not enough.

Part 0002

I am making another part using HeeksCNC 0.13.0 and my Sieg KX1.
I made several mistakes and the part is scrap, but I didn't break any tools.
Mistake 1: The clamps were not far enough from the toolpath. I loosened one clamp and moved it and retightened it during cutting. This let the part lift up a little and I cut too deep. I should have pressed STOP, then moved the clamp, then restarted the operation.
Mistake 2: I zeroed the Z of the chamfer tool assuming it comes to a sharp point, but it has a small flat. So the chamfer was cut too big.
Mistake 3: I saw 5 holes and assumed they were all the same size, but some of them were smaller.
I will try again with no mistakes.

Part 0001

I have made the easiest of the Delrin parts. First I sawed out a piece.
Then I clamped a piece of wood and pocketed an area big enough for the Delrin.
I clamped it down and pocketed a rectangle at z10 with my 6mm slot drill.
Then I changed tool to the 3mm slot drill and pocketed and profiled the holes.
Then I profiled around the outside shape with the 6mm slot drill. The first operation used two depths of cut and left 0.1mm around the outside, climb milling. The second op used one depth of cut and took off the 0.1mm.
I used two tags.
I was pleased with the accuracy. I sawed out the part and sanded off the tags.
All done with HeeksCNC software ( www.heeks.net ). Although I did find some problems and improvements which I had to make to the software before I could get the toolpath.

opencamlib problems

I found a problem with opencamlib on this cone example this morning and I added an "issue" on opencamlib, hoping to fix it myself tonight, however Anders has already fixed it now.
This was what it looked like before:

This is what it looked like after:

More Zigzag

Added material allowance and made start_depth, final_depth and step_down work.

PathDropCutterFinish

I changed the ZigZag operation in HeeksCNC to use the new PathDropCutterFinish class that I wrote in opencamlib. This takes samples every 0.1mm along the path and the refines the results so that the final number of moves is reduced within a deviation of 0.1mm. This means that the number of lines of NC code are less, making backplotting faster. In the example pictured, post-processing took about 1 second and then backplotting took about 3 seconds.