Night 2 - Roll bed

Day two disappeared while I was sleeping (odd), but night two was more productive.

I finished the roll bed (Y-Chassis) without any complications. On this bed the heat table will be mounted, where the actual printing will take place. This bed moves in and out (Y-axis).

Make sure that the rods can go in between the ball bearings without too much force. The four 40mm screws you see to the left, going through the plastic adjusts the force on the rod. Lose them up if it is too tight.

I then continued on the X-Chassis, so far the most complicated part. This moves the extruder Left/Right (x-axis), and follows the z-axis movements (up/down). Some parts really showed what you can do with this printer.

This is the motor bracket to move the extruder in the X-axis, to the right you can see the fixture for the Z-axis rod. This was the so far most complex part to build with 6 ball bearings in different angels and four M4 insets in between.

The M4 NYLOCKs has to be press-fitted and I used a screw and a hammer to put them into place. In this case they are press-fitted on both sides.











(Right) Here you can see where this block is placed. You can also see the 4 washers squeezed in and the 6 ball bearings that will clamp around the z-axis rod.

The two holes are for the rods where the extruder "sled" will be located.

Don't drill those holes, they are supposed to be clamped tight around the rods.

(Left) the finished piece.






There is a M8 nut press-fitted in the middle. Don't bather trying to press-fit it before you assemble the other parts. It will be nicely press-fitted when you put it all together.

The plastic parts are both flexible and strong, so don't be afraid to break it.







This is the "sled" where the extruder will be mounted. It slides along the rods on 8 ball bearings, controlled by the x-axis motor.



















At the other end we find the second fixture around the z-axis rod.


















The Z-axis lead screws was quick and easy to prepare. I did the mistake to believe that the rim actually was a part of the support material that should be removed. This resulted in the cog wheel being miss aligned with the driving belt.

After carefully removing the rim, from the support material, with a razor blade it all aligned perfectly.

The left one is with the cut off rim back in place.








That was night two, need to get up earlier tomorrow for midsummer shopping.