So I am trying to figure out why my z-axis keeps moving the wrong amount - it seems that when I put in 1 mm (I have a 8mm lead screw - from the Another Z-Axis 3D print instructions) and the unit moves 5 mm. I run the motor test and my motors are not reporting back happy - they both move but then both say fail on direction. (The sled motors are also reporting as fail on first move but ok on 2nd?). Any thoughts or ideas?
Here is a post to the formula to calculate your z axis plunge.
I think I just need a new z-axis encoder… going to try that next. Currently the z-axis just goes so far because of time… it does not seem to move based on where it is at all… it currently goes about 5mm each move
The new z-axis motor solved my problem… now I just need to get the right tension on my chain pulleys. Any suggestions on a proper weight?
Bradley Miller wrote:
The new z-axis motor solved my problem… now I just need to get the right tension on my chain pulleys. Any suggestions on a proper weight?
The key is to not have enough counter-weight that there is more force on the
non-sled side of the sprocket (there is backlash in the gearbox, you want to
keep the net forces always towards the sled side). somewhere in the 4-7 pound
range is typical, but it will depend on exactly how heavy your sled is.
David Lang
