Home / Forum / Assembly / Just double checking on the new Z-Axis and Middle assembly / Reply To: Just double checking on the new Z-Axis and Middle assembly

Profile photo of vicious1vicious1
Post count: 2677
#13483 |

How tight should the conduit be in the bearings? I’ve left the bolts that are designated as tension bolts loose but I find that the fit for the conduit is still tight enough that it causes a bit of spring in the plastic for the XYZ pieces unless I loosen very slightly the bolts holding the bearing in the XYZ parts. When the conduit is in place there is no noticeable movement of the bearing bolts. That is they are not loose enough to be flopping around but they are not fully tightened up. With the bolts tightened up there is maybe .5 to 1 mm of spring in the outer ends of the XYZ parts when the conduit is inserted.

The parts should flex a bit sounds like its fine. Nothing needs to be all the way tightened up. The bolts are there to hold the bearings and add tension only if necessary.

I’m assuming that the tool mount will need to be removed from the Z axis in order to install the Z axis in the middle piece. The instructions for the new Z axis show installing the tool holder and the upper and lower motor parts and laying the assy over the edge of a table to check the rail alignment. I’ve done that but obviously you can’t slide the Z axis onto the middle assy with the tool mount in place.

You should be able to slide it in fully assembled. What hits? Please post a picture.

Just wanted to make sure that I hadn’t missed a step somewhere.

I have the Z axis assembled as well as the middle and am about to pull the old assy off the CNC machine and work on the X and Y rails to get them square with the new middle and Z.

Looks really good so far. Everything with the new middle appears to line up perfectly, hole sizes are ideal and no trimming of adjusting was needed. A lot of that is due to finally getting the last tweaks on my 3D printer so it is as nearly perfect as is possible, and using the Zebra plate for the printing surface got rid of warping issues I was seeing with some of the parts before.

So I just wanted to check on the conduit tightness (it’s the opposite of the problems I was having with my original build where things were way to sloppy loose.