Hi thanks for the info! Ok so maybe I gotta find someone that can do that for me... Cheers, Aitorby Megator - Controllers
HI Noobman, You are right that was measuring the resistance with the rest of the board connectd. However when I disconect it I still only get 3.5 Ohms. There is no short with the aluminium heater block, but one of the wires from the heater block came lose it created a short just before it died. I am almost certain that the problem is on my Melzi board as I cannot communicate with it through theby Megator - Controllers
Ok thats good to know but how do I get the print to start from that point again? ie if I set it at the point where it left off and start a print again would it not simply go to the beggining again and reprint what it has already printed? So do you think I blew my chip? The sparks were between the hot end wire and my ungrounded soldering iron. If I switch the ATmega1284P chip can I reprogram itby Megator - Controllers
Hi Traumflug, Thanks for the info! I will try to reprogram my Melzi when I get home tonight from my exam. I have been using Arduino IDE 0.23, 1.02, and 1.03 so I dont think thats the problem. As a bit of background, half way through a print one of my hot end wires came loose so I decided that I would solder it back on. Now being a Noob I a) didnt want to turn the printer off so that it wouldby Megator - Controllers
Hi I am getting the same error on my Melzi electronics and from the reading I did this can occur if you blow the chip on your board. I have tried 3 different combinations of Arduino IDE and drivers specific to the 1284p chip on my Melzi and still no luck, also the reset trick. What I have not been able to find is some information that will allow me to conclusively rule out a defective/shorted/bby Megator - Controllers
Ok so I measured the resistance of my bed at 1.5 to 2 ohms (at both the bed and Melzi connections) in line with what the mendel assembly guide says. Using V/R=I gives me 12v/1.5ohms=8 amps. For the hot end this is 12v/3.0ohm=4 amps for a total of 12 amps. My PSU is rated for 20 amps so I dont think thats the problem and it is the one supplied with the kit so I think they would have matched it toby Megator - Controllers
Hi Alfadex, Thanks for the quick reply but that did not work for me! I still get errors when I try and upload to the board. I get one of 3 errors each time I try 1) The COM port is in use by another program but I dont have anything using it. 2) avrdude: stk500_getsync(): not in sync: resp=0x00 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51 3) Binary sketch size: 1190by Megator - Reprappers
Hi NoobMan, Thanks for the quick reply! I dont think its mechanical as the movements are quite exagerated (cm not mm). As for reactive powers I am unsure the only things that would be plugged in around it are a laptop, printer, space heater, TV, various small electronics chargers. Next time I will try not to run any of these machines and see what happens. I dont have another PSU try sadly, butby Megator - Controllers
Hi Guys, I am having the same issue and can not seem to sove it. I tried looking (using windows search function) for where else the avrdude.conf file is saved within the Arduino 0.23 folder but could not find any mention of it! Can you guys please let me know where you copied the folders to? Thanks for the time, Aitorby Megator - Reprappers
Hello Rep Rap Community, This is my first post and sadly it is no a happy one! I have recently had some issues with my RepRap's electronics and am uncertain as to what is wrong and how to fix it. Recently mid way through a print the nozzle sometimes moves to a completely random position and then continues to print the model. Sometime it even adjusts the Z height down in such a way as to crashby Megator - Controllers