RUG/Pennsylvania/State College/Printers/PSU Mcd

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Revision as of 01:50, 5 December 2013 by Dgdwazzaaa (talk | contribs) (Table colors are now consistent.)
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Mcdonalds1.JPG
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McDonalds
Colors: Yellow / Red
Extruder: .5mm
Temperature: 210C


This page is for information about the PSU Mcdonalds printer.

Log

Date Modification / Problem
Unknown Mcdonalds is working well. Two fans need to be on when the printing is running. One is the large cooling fan. It is used to cool the extruded plastic in case of its warping. Another smaller fan is used to cool down the y motor.
Unknown The only issue about Mcdonalds is the flatness of the bed. The bed is slightly higher toward positive y.
10/8/13 Mcdonalds is not working right at the moment. The filament was changed from White to Blue and the extruder would not feed the filament correctly. We tried tightening the bolts that hold the extruder assembly together but it still will not feed the filament. We also moved Mcdonalds to another table.

Operating Specifications

Design Ohm
Electronics Monotronics
Firmware
Extruder

Problem detecting

There were some very common problems that happened to McDonalds. So I will talk about what the problem is and what the solution is. I think these are major problems that might occur to a printer. (on-going section)

  • Problem: hard to assembling frame. hard to fit each rod into optimum position.

^solution: It is easier to assemble the two triangle parts first. Then using the horizontal rods to connect two triangles.

  • Problem: belt is loose in X-axis

^Solution: find the good tension. Also it is likely the bearing that the belt is running on is wobbling. So make sure the screw is secured.

  • Problem: plastic is not extruded consistently.

^Solution: First, check is the two bearings are pushing against the plastic and sending it into the hot tip. If not, check the screws. Second, two gears might be sliding on each other. Sanding is a solution to reduce the sliding. But it is better to print higher quality gears that match with each other.

  • Problem: hot tip is not hot.

^Solution: three thermal wires are suppose to be attached on the hot tip. Be careful when working with these wires. they are very easy to come off.

  • Problem: how the extruder base is connected with the piece of mental plate.

^Solution: recommend to use big washer. Small washer could crack the entire plastic base. The result is that there will be a crazy gap between the base and the mental plate.

  • Problem: X-carriage wobbles on x-axis.

^Solution: the long x-axis rods might be not parallel. It is also possible that some bearings of the x-carriage are not sliding on rod. carriage wobbling can be found every time the carriage changes direction during printing.

  • Problem: Belt is loose on y-axis.

^Solution: First, check the belt tension. When the tension is too much it is necessary to change the zip tie. When changing zip tie, make sure new zip tie is on before cutting off the old one. This tip makes life much easier. Third, check if belt is parallel.

  • Problem: y motor is not spinning well.

^Solution: Due to the pulling force from y belt, y motor is sometimes spinning while against the piece that holds the motor. This makes the spinning not smoothly.

  • Problem: y carriage is not moving smoothly.

^Solution: I think y carriage is the most important part in entire printer. there could be many problems in y carriage. First, rods could not be parallel which causes the y carriage wobbling. Second, some bearings of y carriage could not slide on rods. Third, it is also very important to find the right distances that match the bed, carriage, and rods.

  • Problem: problems with circuits, chips and electric board.

^Solution: be aware when dealing with circuits. Pay attention of the directions of wire.

Operation

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PSU Mcdonalds - Current Condition



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