Equipment/Makerbot Cupcake: Difference between revisions
From London Hackspace Wiki
→Troubleshooting
| Line 44: | Line 44: | ||
**The extruder mechanism is now the [http://wiki.makerbot.com/plastruder-mk5 MK5 plastruder]. | **The extruder mechanism is now the [http://wiki.makerbot.com/plastruder-mk5 MK5 plastruder]. | ||
**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]). | **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]). | ||
**They also need to be able to stand a maximum temperature of 250C. .. which the Ohmite ones aren't, apparently : "Derating: Linearly from 100% @ +25°C to 0% @+275°C." 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 ? | **They also need to be able to stand a maximum temperature of 250C. .. which the Ohmite ones aren't, apparently : "Derating: Linearly from 100% @ +25°C to 0% @+275°C." 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 ? | ||
