I keep having left cut deeper than right: my bed is flattened and square. What causes this? Is this tiling? Do I need to adjust spindle in some way?
Pics show me chamfer a small sign and the end result. Starts off good, the more right spindle goes, it just doesn’t cut. Drawing in CC pro is correct. This is not the first time.
Help appreciated!
2 things come to mind:
Wood has been planned to size, so thickness is equal. Clamps- could be but it also happens when I tape wood to the table.
Thickness planing will get you equal thickness, but not necessarily flatness. In your first picture, I see a single clamp about 6 inches from the end of the piece. I would try clamping closer to the end of your stock. (having more clamps in the middle wouldn’t hurt either)
Are you chamfering after performing the contour cutout to full depth?
If so, remember you are releasing tension in the wood. Even with some fairly beefy tabs the board could flex enough to affect the chamfer.
If that is the issue you have two options:
I had a larger piece of wood that I was carving a 3D ship on. I had the back taped with blue tape and superglued together. all of the surface area that touched the board had tape and glue. I made sure the wood couldn’t move and even tested the center for flex or bowing. I started running my part and during the roughing out stage with the 1/4" flat upcut endmill, I started noticing the sound of the cut changing as it went into the center area. I started watching it closely during the cutting of this area and noticed that the upcut bit was pulling the material up into the cutter. During this hard pull of the material, some of the tape released from the part and another area released from the table.
The material was pulling up into the endmill every bit of 1/8". Needless to say, the board was ruined. the carving was scrapped, and I had to rethink my holding. I decided to forego cutting the ship again and gave up on it. The job was just a test of a 3D carving that I was trying to increase in size.
Most of the times when we design something and check the simulation, and see that the simulation looks good across the board, then we run it and things change and don’t look anything like the simulation, then something has moved. There is only 3 things that could move if your machine has all of the framing tight. One: the part could be moving if it is tied down with clamps. Two: the part maybe moving from the tape if it is blue taped and glued like my example given above. Or Three: the endmill in the spindle is moving in the collet, thus changing the depth of cut.
