@GregValiant very, very true and yes I agree I hate throwing money and hoping it fixes the problem and mind you I'm new to 3d printers. I'm excited to learn and understand all the mechanics of it.
I'll try this out and I also found another post about the problem I'm having but in a different format
and the first comment by Nenotriple clarified and sums up what is happening in the most simplest of terms:
"To boil down exactly what's happening: The Z screw is turning and moving the left side of the X gantry up, (side with extruder) but the right side is either bound or loose. The Z axis keeps going up, but the nozzle height only changes when the slack is gone. That's why everything is perfect after those layers, except the cube you printed is short."
If the problem was the right side then I would call it "sagging". Since the problem is on the left side, I'm thinking the problem may be inconsistency in the Z.
Starting at the beginning (and trying to make no assumptions):
In closing (and because the coffee is done) The Z motor is direct drive to the gantry. On the left side, there should be no slippage or any inconsistency in the stop point. It is the driver side. The right side is different as it's a follower. The videos cover the fact that the X beam must be rigid while allowing gravity to always hold the entire assembly "down" on the threaded rod. There cannot be any backlash. If the threaded rod is having to "pull" the gantry down then there are going to be inconsistencies in the stop point when leveling. They might show up during a print if you enable Z-Hops. They probably would not show up if the Z motion during a print was constantly upwards.
I HATE throwing money at a problem when I don't understand the problem. The dual Z drive may fix the problem, or you may just be adding another level of complexity.
Remember the words of that noted philosopher Dr. Bunsen Honeydew who said (just as he started his second bottle of tequila) "Gravity is a myth...the earth sucks."Edited by GregValiant
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