I’ve taken the plunge into CNC routing, and I’ve been refining my approach and workflow, but I’m having trouble with a reliable, consistent workpiece home/origin position. This last experiment I thought was going to be nigh on perfect but not so much. Here’s my approach and a pic of the results, any suggestions or advice? Many thanks!
- I design and generate toolpaths from Fusion 360.
- Toolpath plans:
- Adaptive Clearing with a 2F Straight 1/8" (Black collar from Inventables) - rough clear to .2" around the model’s top surfaces
- A second Adaptive Clearing with 2F Fishtail Upcut 1/16" (Blue) to exactly the model’s top surfaces
- A 2D Contour with 2F Fishtail Downcut 1/8" (Neon Yellow) to cut out the model from stock
- Toolpath plans:
- Export toolpath with Easel post processor, import g-code into Easel.
- Workpiece is secured over a second MDF wasteboard to protect my precious new workspace
- Piece was previously planed down to the appropriate height
- I set up the machine for it’s first carve, following the Z-Probe process to set height, then X & Y home
- I run the first carve to the ooo’s and ahh’s of friends
- After the carve, I have to jog the machine to get the dust shoe off and change the bit
- I click “Carve” and run through the Z-probe process, this time using the previously set X & Y home
- Change bits again for the third carve, same Z-probe process
The first two cuts seemed well aligned on top of each other.
The final cut was off (see picture). I expected the third Countour path to cut out relatively close to where the Adaptive Clearing paths stopped (radially), but it was off by a good half centimeter to the left and bottom. Pretty sure nothing was bumped between cuts, and the material was down quite tight and didn’t move, but even if it was shouldn’t have using the previous X & Y realigned?
I want to do more complicated pieces that will require carving from both sides of a piece, so I’m really trying to get this consistent-origin workflow down right. Thanks!