Re: Bridgeport boring issues
There are so many possibilities here it is difficult to know where to start. And I am just guessing here due to the limited information provided
Mechanical
Backlash or binding
Overloading the motors
Electrical
Bad Signals/noise
Tool path/G Code
Feed rate
Too aggressive tool path
Overall technique
If the machine is accurate otherwise, then I would have a serious look at how you are 'boring' holes. I suspect you are pocketing rather than boring, which is done with a boring head. Pocketing is done by interpolating with an endmill. It is good practice to rough pocket the hole, leaving about 0.5mm material, then finish contour with a helix tool path.
Jim Dawson
Sandy, Oregon, USA