Tolerance checks are built into the 1911 program to make sure that the frame is no more than 0.008 inches out of square. Once it initially probes the part, it will compare the distance on the right side to the left side. If it is more than 0.008 inches, it will show a tolerance check failure.
1. X axis out of tolerance: (alarm: unknown - m101 command failed - x) There is a significant difference between the x position on the side of the front of the frame and the same side of the rear of the frame. The workpiece may be improperly mounted to the jig ,or the jig may be improperly mounted to the t-slot table. Otherwise, the t-slot platform is likely slightly higher on one side than the other.
a. Follow the procedure in this video to true your t-slot platform on GG1 & GG2. You can use the ¼” end mill used for the AR milling program.
b.If you have a GG3, there is an X auto level function if you go to Settings > Machine Actions > Auto-Level X Axis
c. If you keep getting the X out of tolerance, check that the jig sits flat on the table as well as the frame.
2. Z axis out of tolerance: (alarm: unknown - m101 command failed - z) There is a significant difference between the z position on the top-front of the frame and the top-rear of the frame. When snugging the "anchor" bolt, pull jig towards you, to remove any slack there could be on the rails. Then align the jig so it's close to parallel to the table. Push the left side of the jig forward so that the frame makes contact with the tooling when prompted in order to true the frame's z axis position. It may take numerous attempts.
a. If multiple Z-axis errors, follow these indications.
b. Prior to the probe sequence, when placing the frame-jig assembly into the work bay, push the frame to the left and rotate the tool so that two of the flutes are touching the frame. Snug the bolts and follow the probe sequence instructions.
3. If you continue to have issues, try a different frame, if you have another one. This can rule out the frame being the issue.
a. If, after leveling the T-slot plate and an additional few attempts, you are still having issues, there is a file that will ignore the tolerance checks after the probing sequence.
b. It is not recommended to use the no checks file before leveling the T-slot plate.