I have a 4 and am having horrible problems with the z axis binding. I see that the taz 6 has a radically different setup for the z ends and x carriage. If I print new z tops and bottoms and x ends can I use the rest of my current parts (screws, rods, nozzle, etc) to upgrade my printer?
Yes, though you would need the larger 12mm rods and bearings for the X axis. You can get most if not all of what you need right here: https://itworks3d.com/product-category/parts/taz-6-parts/
You will also need to upgrade to a hexagon hotend and implement the auto leveling setup, because the 6 parts do not have a manual Z height adjustment target. A 6 style bed is $20, a hexagon kit is around $70ish. the corner bits for auto leveling and the harness are probably going to be another $30-$40 or so.
All that being said, you really need to track down and understand what the Z binding issue you are running into is before you attempt an upgrade that may compound that issue. To eliminate that, try the following first
- With a set of Verneir calipers, Make sure the distance from the bottom of the X axis end leadscrew nut to the top of the lower leadscrew bearing is the exact same on both sides.
- Look at the top leadscrew bearing. is the top of the leadscrew up the center shaft all the way, and the same height both sides?
- check the bottom Z motor mounts. Are they both down on the leadscrews all the way so there is no leadscrew play?
- watch the z motor couplings for a couple of layers. Do either of them look like they are compressing on one side? Are there any breaks
- does each leadscrew coupling have all 4 setscrews, are they down and tight and on the motor and leadscrew shaft flat spaces for at least one setscrew per side? These can easily fall out and cause binding.
- If none of that was it, check the frame front and back with a 90 degree square
- if it still has issues, unbolt the X axis bearing rod setscrews on the idler side, then run the axis up and down the Z axis agin. Move it back to the middle of the axis, then retighten the screws. This will eliminate either pinching or over bowing.
8 if it still is binding, try loosening the bolts holding the Z motor in place on the side it is binding and see if that has any effect.
You also want to put white lithium grease on your Z axis leadscrews if there isn’t any already.