Well UPS in there infinite wisdom decided not to deliver one of my packages today, so much for two day delivery guaranteed. It really pissed me off as the one package that they don't deliver is the one with the bearings and shafts in it so I really can't do anything on the build until I get that box.
Amazon says they gave it to UPS on Friday, the jerk on the other end of the chat that I waited 45 minutes for it to be connected claims that Amazon didn't give it to them until Monday, granted I am upset that they didn't get me the package and that I have to way until four pm tomorrow to get the parts to start, the thing that had me in an absolute rage was the attitude and the of the chat guy and how he treated me, I was so mad I could spit nails, after telling me basically to go eff myself and then asked if there was anything else he could do for me I told him "Well since you have done nothing but blow smoke up my ass I don't see how you were any help at all." and disconnected.
I didn't expect them to run the package over that night all I asked him was that if they indeed were going to deliver it first thing in the morning like Amazon said that they said UPS would or if it would be the normal four to five pm delivery time like normal and the guy treated me like total and utter shit.
Now that the rant is over I did work on the electronics today though.
I apparently ordered a hotend (extruder) that comes with a thermocouple instead of a thermistor; So what you ask? well a thermistor is like a potentiometer (volume control on your stereo) but instead of you twisting a knob the resistance changes as the temperature changes, a thermocouple is two dissimilar metals put together that when heated generates a small amount of electricity; So what you still say? Well the thermocouple generates a tinsy tiny amount of electricity 0.02 - 0.03 volts so for it to be any good you need a booster/amplifier circuit if your board is not thermocouple compatible (which mine is not) for the thermocouple to do any good as the board normally uses five volts normally., the one that comes with my hotend will not work for me without that circuit.
So order the circuit.... well the only place I found it was slow boats from china that will be here at the end of April unless I want to spend $60 in shipping for a $10 part.
I thought I would order the chip and make my own circuit.... nope same thing no one has it locally and slow boat from china again.
I do however have a ten pack of thermistors so I am saved..... well sorta, there is a -cough- size issue.
As you can see the LITTLE glass thermistor is so not going to fit, and since it is glass if I use the set screw that held the thermocouple in place it was shatter it, I was thinking about gluing it in when I had a brilliant idea, I have some brass rod that I bought to make a tool for scratch building houses etc for my N-scale model train and it was the exact same size as the thermocouple so my idea was to cut a piece then drill out the center (I didn't get exact center but I tried) then glue the thermistor in with some Arctic Silver adhesive and then slide the brass piece in and clamp down all I want a perfect solution.
And here with it in place but not glued into the brass adapter yet.
It worked out beautifully and if the thermistor goes out I have enough brass rod to make several hundred of those adapters so I am set for life there.
Now don't get me wrong there is nothing wrong with the hotend, I was not deceived I just ordered parts at four am and did not see where it was clearly marked thermocouple so that was my bad but honestly I would order it again in a heart beat.
It is listed as "Generic Hotend" but I was running low on money so I ordered it, it was forty dollars, however I was looking at the E3d hotends that everyone is carrying on about and how they are so awesome and why. Well guess what, when I got my generic hotend I looked it over of course, it is very nicely built and then it hit me, it has every feature that I read about for the E3d v6 head has except the shroud around the heat sink is different but I could print out anything there, I was so psyched, I thought I was settling for something cheap that I would swap up to something better later and heck it has all the features of the "better" one, I am extremely happy with it so far, it looks like it should print nicely.
Oh and it uses standard nozzles so I was able to get some different sized nozzles also.
Here is a list of links for what I bought that I talked about in this post.
1. Generic Nozzle Metal J-head Hotend Thermocouple Extruder 24v 0.4mm with 700mm Tube
2. RioRand(TM) Upgraded 10 pcs 100Kohm NTC Thermistors thermistor,temperture sensor,Reprap,Prusa 3D printer
3. Kingstorm 3D Printer Extruder Nozzle 0.2mm 0.3mm 0.4mm 0.5mm Nozzle Print Head Kit for MK8 1.75mm Printer
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