Why is the weight weight of the paint film abrasion instrument belt inconsistent? The mark on it is 1000g, and the weighing is only 750g; the 500g is only 250g, and each is 250g less.
May I ask if the QPM plane grinding machine can set the number of turns. You need to be able to set the number of turns. Normally, the test pigment is 50 turns * 3 times. Is this okay?