Building a second 3D-printer - rails, belt and motors

Time for an update about the 3D-printer build.

What the printer looks like now

Two of the lineair rail carriages were not running smooth.

One of the new linear rail carriages

After receiving a new pair and the M3 T-slot nuts, I could continue the build with mounting the lineair rails to the frame.

The top idler

After mounting the lineair rails, I mounted the top idlers. Two flanged bearings (F623ZZ) make them run smooth.

End stop switch

I designed and printed a small part to hold the end stop switch. Good to have a my Prusa Mendel i2 3D-printer still up and running for that!

Carriage for open ended belt

The carriage for open ended belt is mounted to the lineair rail carriage. The printer arms will be mounted to the two parts sticking out. The screw at the bottom can be used to tension the belt. There is also a screw on top (not visible on the photo), that screw touches the end stop switch and is used for calibration.

Rubber motor mounts to dampen the noise

Motor mounted to the frame.

After mounting the motors the belt can be mounted. I used hex screws and an allen key to fasten the screws.

Parts used

• MGN12-1H-L600 Linear Rail and Carriage for Kossel XL
• Pre-assembly T nuts for 2020 aluminum profile (3 mm)
• Carriage for open ended belt
• Open Ended 6mm Width GT2 Belt
• 6x Flanged Ball Bearing F623ZZ
• Carriage for open ended belt
• NEMA17 Stepper motor 1.8 degrees step / 4.8 kg/cm (set of 4)
• Antivibration damper 4 nema17 stepper
• Rostock 16 Tooth GT2 Pulley
• Endstop Subminiature Switch SS-5GL
• 3x Kossel XL end stop switch holder
• 24x M3, 8mm bolts to mount the linear rails
• M3 bolts to mount the motors