How to identify the weak foot
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I want to know how to determine the position of the virtual foot. It needs to be fast. I don’t want to look for them one by one
Align the dial of the dial indicator vertically, loosen each foot one by one; the foot for which there is no change in the reading of the dial indicator is the false foot.
There’s not much that can be done; usually it’s just a few bolts, and after aligning them, each one still needs to be checked individually.
First, remove all the shims, then check with a feeler gauge. Check the gap between each leg for any skew; if there is skew, level the base or frame. Add shims to the spaced footings, level them, and ensure even contact with each footing. 2. Check with a meter. Bring in the foot bolts and check each one using a dial indicator; once each foot bolt is tightened, the value shown on the dial indicator should be within 0.05 MM. If it exceeds this range, further adjustment is required. 3. In actual work, if it is found that the alignment data does not follow the calculated values and the system malfunctions, the soft feet should be checked.
I have a good solution, and it’s quick – you just need to use the function for finding the center point in the laser aligner; if you don’t have one, you can borrow one first
During operation, use a handheld vibration meter to measure the vertical vibration levels of each foot; those with significantly high vibration values, or those showing a large difference in vibration levels on either side of the joint, are considered false feet
After inserting the shims, you can try to pull them out manually; if they can be pulled out, it means the shaft is loose. However, this method works well only for ordinary motors, as it isn’t very effective for large motors.
The dial of the dial indicator is at a vertical position??? Won’t you accidentally move the dial indicator when loosening the screws?
It can be determined by simultaneously touching the foot and the foundation with your hand during operation.
Use a wrench to slowly loosen Ruth’s foot; at that moment, the significant change in the readings occurs with the loose foot