You can use a digital level or download a leveler app on your phone to get an exact reading. On a spirit level, you can tell when you’re at 6. 5 degrees when the bubble is floating right in the middle of the topmost vertical line printed on the glass tube. If the reading is too low or the bubble is in between the center lines, raise the back legs. If it’s too high, lower the back legs.
If the machine is raised to the right, you need to raise the left leg and vice versa.
If his caster has a nut on it, adjust the leg with a wrench by turning the nut. If the caster doesn’t have a nut, adjust the legs by hand by rotating the platform at the bottom of the caster. Enlist a friend to help you lift the machine to help you access the caster safely.
Count the number of times you rotate the first caster so that you can raise the other leg the same number of times.
Adjust both legs the same way to ensure that you’re not messing with the horizontal angle of the machine.
For example, if your machine is perfectly level horizontally but the pitch is 4 degrees, raise both legs by turning each caster 2. 5 times to the right before checking again. As a trickier example, if the pitch is roughly 9 degrees and the horizontal angle is -1 degrees to the right, you would lower the back left leg by rotating the caster 360-degrees to the left once to fix the horizontal level. Then, lower both back legs by turning the casters counterclockwise twice to lower the pitch from 9 degrees to roughly 6. 5 degrees.
