Just went through this on other thread Sled Balance
Main points were:
- With the sled removed from maslow hang the sled using rope at the top of the metal ring. Instructions indicate that the sled should hang straight down. I found, on my sled, that having it tilt half the angle of the work surface worked better. Adjust the sled balance by moving the ring away/towards the sled base.
- Mount the sled back on Maslow and check the angle of the chains relative to the work surface. They should be parallel. To fix this you can add another backing board to work surface or change the length of the spacer blocks that hold the top beam (that the motors are attached to). Wrong chain angle tilts the sled more when the chains are short (at top of work surface). If your motors are mounted too far away from the work surface then the top of the sled will be pulled away from the work surface. Conversely if the motor mounts are too close to work surface then the bottom of the sled will be pulled away from work surface.