Hi guys! Back again with another problem with our school ShopBot Here is what is happening; nearly every file I cut now is a bit inaccurate. What I mean by this is that lines aren't cut where they should be, they always seem to be offset just a little bit. Sometimes it seems like it cuts too far, sometimes not far enough. It's difficult to explain in words, so I will let the pictures do the talking.
Here is a test file I made in ArtCAM. The idea was to draw a bunch of shapes and then connect them with lines. Here is what it looks like on the computer:
cZf07bM.jpg
And here is what it looks like when cut:
5xKrzM1.jpg
Notice that the line connecting the bottom of the star to the bottom left box is completely offset, also if you zoom in, some of the lines don't attach to the corners of the shapes.
As another example, here is the Arrow of Light on the computer:
T849u1D.jpg
And after cutting:
WuvQFI2.jpg
You can see in the tail of the arrow how it messed up a lot, also in the rays of light, etc. Lots of messed up lines on that one.
Some useful info:
- I am running the motor at 16,000 RPM
- Move speed is 50 in/min
- Plunge rate is 28.5 in/min
- The cut depth in those pictures is about 0.03 inches.
- I am using the original, white control box that says "ShopBot" on the front in blue.
- I believe we are using a 4' x 4' PRT
- Software version is 3.1.7.
- Ramp settings are default.
- Tool being used is a 5/8 inch 90 degree V-Bit.
I thought this may have been caused by the machine having a hard time cutting through the wood, so I tried it with a 0.015 inch Step Down, and that didn't really change anything. Even when cutting just barely into the wood, it still messes up.
What is going wrong? Thanks for any help!! I can supply any more info needed.