Z-axis servo/Stepper motor Pen Plotter mount for V-Slot

thingiverse

12/28/2020 Update: I added the file *RP_200411_Servo_Z_Dual_X.cfg* that has my klipper configuration using the servo for the Z-axis for reference. Z-axis Servo/Motor Pen Plotter Mount for V-Slot ------------------------------------------------ I needed a pen mount for the Rolling Plotter I am designing, and https://www.thingiverse.com/thing:2349232 was pretty much what I wanted except it had to be modified to fit my 2020 V-slot. I redrew it in Fusion 360 like it was and then made some changes to make it work with my design. I encountered some issues getting the servo to work with Marlin firmware, so I created a few other mounts using a Nema17 pancake stepper and a 28BYJ-48 stepper motor. Then I found a way to use the servo with klipper firmware, but I might switch to a stepper motor later. I found models of the servo, Sharpie, and 28BYJ-48 stepper motor on GrabCAD, but didn't include them in the Fusion 360 assembly file here. The build log for my printer can be viewed here: https://openbuilds.com/builds/a-rolling-plotter.9207/ Here's a video of my plotter in action. <iframe width="560" height="315" src="https://www.youtube.com/embed/IIjZrsuUH6U" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> To print the mounts, you'll need to download these files: **Pen_V_Mount.stl** **V2020_Z_6_4mmShim_Plate.stl** **Base_Slide_Mount_Long.stl** or **Base_Slide_Mount_Short.stl**. The long version is 5mm longer for looser springs. **M3_Spacer.stl** if you're using M3x16mm screws to attach the pen mount to the V-slot mount For the servo mount style, you can attach the servo on either side that's most convenient for you. Print: **Z_Servo_SideMount_V2020.stl** Edit the **Z_Servo_SideMount_V2020.f3d** file if you need to make any changes to the design. For the 28BYJ-48 motor mount, you can also attach it on either side that's most convenient for you. Print: **Z_Mount_28BYJ-48_V2020.stl** **Horn_28BYJ-48.stl** Edit the **Z_28BYJ-48_SideMount_V2020.f3d** file if you need to make any changes to this design. For the Nema17 pancake stepper mount, I only made a single-sided attachment. You'll need to attach it on either side that's most convenient for you. Print: **Nema17_Pancake_Mount.stl** Edit the **Nema17_Pancake_Mount.f3d** file if you need to make any changes to this design. All files were printed at 0.2mm layer height with eSun PLA+. The Base_Slide_Mount was printed with 4 perimeters and 30% infill. All other parts were printed with 4 perimeters and 50% infill. Only supports were used on the front of **Pen_V_Mount.stl** print. To assemble the mounts, you'll need to attach them using M3x16mm screws and locknuts. You may also need a plastic washer for the pen mount. M3x10mm screws with locknuts are needed to clamp down the M3 rods on the slider. One M3x16mm screw and nut is used to clamp the pen in place. You may want to use a longer screw for smaller diameter pens. Two or four M5x12mm screws with T-nuts are used to attach to the V-slot. Since the pen is light, I only used two screws. M5x16mm screws with T-nuts are used to attach the V2020_Z_6_4mmShim_Plate to the carriage. I cut a 2020x250mm V-slot in half for the vertical V-Slot and used the openbuilds V-Slot Gantry Plate-20mm for the carriage, which is 65mmx65mm. The springs I used came from pens at a dollar store. Those springs were rather long, so I cut one in half and used half on each side. The M3 rods I used came from an old DVD drive, as mentioned in the build. I have only tested the servo mount, so let me know if you find any issues with the other two mounts. I sized the Nema17 pancake mount around the pancake motor from zyltech.com. All pancake motors are not the same depth.