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Project:Cupcake-o-Matic: Difference between revisions
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→A Better Extruder
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I'm hoping this bodge will last long enough for me to print an improved extruder, perhaps the latest modified Greg's but with mounting options for the 16mm diameter Cupcake hot end. Alternatively I will have to hope some one will take pity on me and print me a new one. :D | I'm hoping this bodge will last long enough for me to print an improved extruder, perhaps the latest modified Greg's but with mounting options for the 16mm diameter Cupcake hot end. Alternatively I will have to hope some one will take pity on me and print me a new one. :D | ||
I'd also like to alter my hot end, at the moment it consists of the MK4 hotend but instead of nichrome wire wrapped around the brass barrel/nozzle I've added an aluminium heater block. This is a 20x20x10mm block of milled aluminium with a 5.6 ohm 2 Watt vitreous enamel resistor mounted inside. The thermistor is trapped on the outside with a small M3 washer screw. I'd love to reduce the amount of metal on my hot end and just use a nozzle mounted directly into the PTFE heat barrier and go back to using nichrome wire. This would let it heat up much faster but it would mean that it would need to be carefully controlled whilst extruding as it would lose heat much more easily. | I'd also like to alter my hot end, at the moment it consists of the MK4 hotend but instead of nichrome wire wrapped around the brass barrel/nozzle I've added an aluminium heater block. This is a 20x20x10mm block of milled aluminium with a 5.6 ohm 2 Watt vitreous enamel resistor mounted inside. The thermistor is trapped on the outside with a small M3 washer screw. I'd love to reduce the amount of metal on my hot end and just use a nozzle mounted directly into the PTFE heat barrier and go back to using nichrome wire. This would let it heat up much faster but it would mean that it would need to be carefully controlled whilst extruding as it would lose heat much more easily. However I could use a [http://reprap.org/wiki/J_Head_Nozzle J-Head Nozzle] hot end, these are popular due to their high reliability, unfortunately they can cost up to £50 which is a lot for something so small. | ||
