Equipment/Makerbot Cupcake: Difference between revisions
From London Hackspace Wiki
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, 18 September 2011
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| *Temperature of Shape Next Layers: 220.0 | | *Temperature of Shape Next Layers: 220.0 |
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| ====Troubleshooting====
| | Yup, that slhuod defo do the trick! |
| *Replacing the heater barrel
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| **[http://store.makerbot.com/toolheads/plastruder/makerbot-spare-parts-kit.html MakerBot store - spare parts kit]
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| *Uncloging the extruder
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| **[http://makerblock.com/2010/02/how-to-unclog-your-extruder-barrel-and-nozzle/ MakerBlock - How to unclog your extruder barrel and nozzle]
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| *Extruder
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| **The extruder mechanism is now the [http://wiki.makerbot.com/plastruder-mk5 MK5 plastruder].
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| **For unknown reasons, the heater resistors needed replacing. Replacements were obtained but were the wrong physical size (didn't fit the mounting hole spacing). The correct resistors are 5R, 10W, 1% and the mounting screws are M2 at the diagonally opposed corners of a rectangle 15.9 x 14.3mm (ohmite series 810 footprint [http://www.ohmite.com/catalog/pdf/89_series.pdf pdf]). Also [http://uk.farnell.com/welwyn/wh10-5r-ji/resistor-15w-5-5r/dp/9507116 Welwyn parts from Farnell] (only 5% tolerance but I can't see why that would be an issue).
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| ***They also need to be able to stand a maximum temperature of 250C. .. which the aluminium-cased ones can't, apparently : "Derating: Linearly from 100% @ +25°C to 0% @+275°C" (Ohmite datasheet). Is this just their way of saying you can't dissipate any power (and hence increase the temperature) above 275C ? Or that Makerbot have underspecified the resistors ? Or is there another manufacturer that permits higher temperatures ?
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| ==Consumables== | | ==Consumables== |
