RUG/Pennsylvania/State College/Printers/PSU [email protected]

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Revision as of 14:49, 29 April 2012 by Mtg5072 (talk | contribs) (Build Notes)
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Progress

4/29/2012:
[email protected] is now fully operational in all axes. The next step in its developement will now be to undergo print testing, or alternatively, convert the electronics to RAMPS_1.4 with Marlin Firmware now that all electrical components have been confirmed opperational.

2011:
Pennsylvania State University (PSU) [email protected] is in operational mode and continue to be in diagnostic form. Within next week, we have an idea how to approaching for the future project.

Printer Status

Operating Specifications
Name Status Design Electronics Firmware Extruder Temperature Comments
[email protected] Purple Working [email protected] LPC-H2148 Microcontroller Model 4 Syringe ??? ???



Build Notes

The majority of the initial PSU [email protected] build was completed by original owner, before it donated by after prolonged difficulties regarding its initial operation.

After extensive trouble shooting, we were able to drive all axis. Problems that were fixed included incorrect wiring from X-axis stepper motor to microcontroller board, faulty 24V power supply, disconnection of endstop ground connections, and a missing endstop pullup resistor, and loose pin to endstop connections.
The only problem that still exists a driver error when the power supply is disconnected before the USB. No advancements were made in the course of our trouble shooting, but this problem seems to be avoidable. Students found that one must simply be careful of the order when disconnecting these cords, and if mistakes are made, a simple restart is all that is necessary to have printer back in working order.

Electronics

We were fortune enough to have all the working electronic kits and installed as instructed. Microcontroller for [email protected] model 1:Microcontroller Olimex Philip LPC-H2148 (under ARM) Apparently, we are missing the JTAG cord which is important for flashing the microcontroller. I believe we are specifically looking for OpenOCD with firmware v4. However, the board were flash for firmware v3. Firmware module

Software

Currently, PSU [email protected] is using [email protected] v.23 made by cornell university and [email protected]


A Fab@home Toolchain.

[email protected] Software: Necessary for operation in stock form.

  • FabStudio: Slicing software that generates .fab files.
  • FabInterpreter: Printer control software. Only capable of printing with .fab files.
  • svg2fab v2.0: Useful for producing 2D .Fab files for toolheads such as vinyl or foam cutters.
  • Fab2GCode: Converts .fab files to .gcode files.




Printable Materials

Currently we have Acrylic Winsor Blue available for part to print. More to come on order and check out vendors for harware and material

Diagnostic Notes

Currently, [email protected] machine has a working X axis and Z axis. Y axis does not function very well because there is something wrong with the motor not being adjusted. Also, the X axis seem to be driven itself after the program are close, which is not good. With in this week, we can expected to get the [email protected] ready for future project.

Future Projects

  • Electronics and Software:
    • Convert electronics to RepRap style electronics and firmware(RAMPS1.4 w/ Marlin firmware). This would allow [email protected] to our ultilize newer and more advanced RepRap slicing and control software, since original [email protected] software relies on .Fab files (developed by [email protected]), instead of standard gcode. This conversion would not only allow the use of newer and more advanced gcode slicing and control software, but would also allow use to easily integrate the use of the [email protected] system into the Penn State EDSGN course.
  • Electronics: RAMPS_1.4 would be the easiest switch since it allows for max and min endstops. Differences between our current RAMPS_1.4 configuration and one used on a [email protected] would be:
1. The use of only two end stop pins(3 are needed with Opto endstops)
2. The use of only one set of Z-Axis stepper pins.
  • Firmware: Marlin would be the wisest pick for the same reasons it was choosen for the Mondo and Unit Clear Ramps based printers. Uniformity between machines would a highly desirable byproduct as well. Changes needed to adapt to Marlin firmware would be:
1. Change the endstop settings from optos to mechanical.
2. Check to make sure inactive endstop code is 1 instead of 0.
3. Change esteps/mm to that of the lead screws utilized by the [email protected]
.
  • Extrusion
    • Develope and print L-bracket carriage adapter for Wade's Extruder. This would allow PSU RUG to utilize the machines precision linear movement for prints requiring higher tolerances.

Reference