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Chris Warburton posted an update in the group
RepRap: 1 year, 5 months ago · updated 1 year, 5 months ago · ViewPlayed with the RapMan a bit more on Friday. Thanks for the filament Andy! Got the Z axis moving again, but it’s still a bit jerky. The good news is that I’ve tested the extruder and the heater works, the thermistor works (which is the one I was worried about) and the stepper works. The filament goes in fine, but nothing’s coming out of the tip, so that’s my job for today
Was using ABS filament at 240C, tried the stepper and manually pushing it through. The screw-based extruder design is pretty poor IMHO; it shaves the edge of the filament off rather than pulling it down :S
It’s extruding! Turns out the rollers were the wrong way around (I didn’t assemble that part!) so it’s giving out nice tangled plastic squiggles
Now to get it printing test objects 
Wow excellent, well done chris. The worm feed extruder’s are a bit error prone but will get you to the stage of being able to printout a new extruder model. Most folk are going with variants of the Wade geared pinch roller design these days. Looking forward to dropping by on Thursday AM to have a look. Sounds like you are not far of finished really.
Best price I have found for filament retail so far is http://www.reprapsource.com/en/shop As they are in Germany the postage is not as prohibitive as from the states.
Actually I take that back this guy is retailing it marginally more cost effectively in the UK. Providing you buy 5Kg.
http://reprapkit.com/shop/abs/
Oh forgot to mention. Find a thermometer that will read the temps at the nozzle and check that what you set is what you get. Knowing what the error values (If any) are for a range of temps will help you later. Or at least give you confidence in it’s capabilities.
Chris see you in the morning at the Uni will be along at about 10:00 ish after breakfast.
w00t! Good work Chris! Can’t wait to see the results of your first printing
w00t! Good work Chris! Can’t wait to see the results of your first printing
w00t! Good work Chris! Can’t wait to see the results of your first printing