RUG/Pennsylvania/State College/Printers/PSU Unit Rainbow
This printer started construction in the Fall 2012 semester. It is an [OHM] model developed by the reprap PSU community. Its progress and pictures will be posted here as it is constructed as a resource for the group members and the community to see the printer being constructed and hopefully give more insight to the building of an [OHM] printer.
This printer is part of the [PSU] reprap group
|Rainbow||Running||Ohm||RAMPS||.5 mm hot tip|
This section includes the progress our team has made on our printer on a weekly basis. We hope that this timeline will help other teams in the future know if they are on track while building their printers
Things that still need to be done:
1. Finish assembling the extruder
2. Sauter the thermo couple junction onto the electronics board
3. Connect all wires to the electronics board
4. Organize the wires so they will not be in the way while printing
5. Test. This printer has not been connected to a computer yet
The wires are all crimped and ready to be connected to the RAMPS board. We also hace all of the end switches mounted on the printer as well as their connections made. The extruder has gears and hot tip with the thermocouple installed as well. The electronics have been programmed with the firmware and we are making final adjustments to the machine to put it into final working order. Of course more tweaking is necessary to determine the step size and speed that the motors drive the different axes with the printer interface program. These adjustments are made in the firmware and once all the parameters are in place, the printer will be ready to go.
The electronics have been mounted and the motor wires attached to the board. The extruder base has been assembled and placed on its track. We also installed the pulley system for the print bed.
We have mounted the print bed and have almost all the parts for the extruder printed out. We have also attached the piece to mount the electronics to.
We have almost finished assembling the x-axis carriage and we are waiting on a few parts to finish. We have mounted the z-motors and are ready to mount the x-motor and y-motor as soon as we get the parts needed. After the carriage is finished we hope to print out more parts for the bed of the printer as well as mounting the x-axis carriage.
All of the X axis parts are printed and waiting to be assembled. Our next task is to install the smooth rods associated with the X axis. Also, get the printer ready to be mounted with electronics and motors.
We have named our printer and built this page on the wiki. We have assembled the frame and we have various parts for the x-axis printed. We also have our motors (the top two are mounted) and have braided all the wires on them. If you don't know how to do a 4-strand braid click here
Below is a list of all parts that will need to printed for this specific printer, this table can also be found on the [OHM] page. Also included in this table is an inventory column to help the group keep track of what needs to be printed.
Frame and Z Axis Parts
In addition to these printed parts you will also need an assortment of threaded rods and smooth rods. More information on how to build the OHM can be found at this [Link]!
|6||Camiel_frame_vertex_6off||Alternative part by Camiel||Printing Complete|
|1||y-motor-bracket_1off_mod3-15||Modified by PSU Reprap Collective||Printing Complete|
Y Carriage Parts
In addition to these printed parts you will need a print bed. They can be thin aluminum or in our case a strong clear plastic that gives the printer a sharp look.
|1||OpenY_8mm Belt Harness_1off||Open Y by Buback, modified by PSU Reprap Collective||Printing Complete|
|2||OpenY_8mm Crossbar Mount_2off||Open Y by Buback||Printing Complete|
|2||OpenY_Arm 90 - 180_2off||Open Y by Buback||Printing Complete|
|1||OpenY_arm45||Open Y by Buback||Printing Complete|
|2||OpenY_Undercarriage_Bracket_1off||Open Y by Buback||Printing Complete|
X Axis Parts
|4||pla_coupling_nophead-1piece_4off||Alternative part by Nophead||Printing Complete|
|2||PSU_x_vert_sideplate_360_end_2off||Alternative part to x-ver-drive-side-plate-360-end_2off.stl||Printing Complete|
|1||xaxis-motor-bracket_1off||Alternative part by Rhys-jones||Printing Complete|
Two major issues affected the Open-X carriage: carriages occasionally "walk" up off the tracks, and inconsistent spacing of the undercarriage bracket occasionally allowed the extruder to move/twist laterally. Both of these issues were minimized through modifications by user Joe Bartolai. The OpenX Arm was shortened and an offset was added so that the bearing attached to it is centered on the rail. The OpenX undercarriage bracket was also modified by making the angle steeper where the lower bearings contact the rail and by increasing the spacing where the undercarriage bracket attaches to the carriage. Part models will be added soon.
|1||OpenX_Carriage_1off||Open X by Buback||Printing Complete|
|1||OpenX_Undercarriage_Bracket_1off||Open X by Buback||Printing Complete|
|1||OpenX_arm_PSU_1off||Open X by Buback Modified by PSU Reprap Collective||Printing Complete|
Currently not included in STL zipfile
|1||HerringboneDrivenGear||Alternative part by Rhys-jones||Printing Complete|
|1||HerringboneDriveGear||Alternative part by Rhys-jones||Printing Complete|
|1||Gregs_accessible_wades_v6||Alternative extruder by Greg-Frost||Printing Complete|
This is a picture of a basic RAMPS electronic board and is representative of the one we are using in this project.