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Need help before first print - No Heat

Posted: Sat Jun 14, 2014 9:19 pm
by Inkrig
I am having some problems with the 3.0 I just assembled. I have looked everything over a number of times and can not find anything wrong other than nothing will heat up now. This is my first build of this kind so please be patient with me.

The good news first. All axis are working as they should. I have the bed calibrated and Z height set properly. My problem started when I went to print the test piece. First extruder 1 would not heat. The temperature monitor was reading -50c. I tried extruder 2 and that heated just fine along with the bed heating properly. I I could not load the filament and realized that the motor was running backwards. I realized that I had somehow mounted the motors and extruders in the opposite positions. I corrected this by swapping the wiring for the extruders, temperature sensors and motors on the circuit board. I assumed that this should simply have solved the motor running backwards problem. Now neither of the extruders or the bed will heat. The extruder motors will not turn but I think that they will not operate until the extruders are at operating temperature. The temperature of extruder 2 now reads -50c. I have tried the spare temperature sensor on the extruder that reads -50c and that did not help. I get the same temperature reading with sensors.

I am not sure if something is wrong with my board to start with because the LCD Display that I purchased has a blank screen. The whole display lights up but there is not any information on the screen at all. I would really appreciate any help that you guys could give me. I am going to be sending this same message to support but I thought I might get help here a little faster.

Thank you,
Marc

Re: Need help before first print - No Heat

Posted: Sun Jun 15, 2014 8:06 am
by Legion 2.3
Hi Inkrig

First of all, which version of the mainboard do you have? V2.0, V2.1 or V3.0? Did you install the correct firmware as mentioned in the manual?

You say that one of the thermistors worked on both extruders, so i think it´s not a problem of the board. Maybe you had bad luck and recieved 2 defective thermistors. Felix should send you a replacement in this case, they are very helpful in these things.
OR you can buy yourself some new thermistors. The modell that´s used for the Felix 3.0 seems to fail pretty fast, resulting in volatile temp readings.
I just ordered this thermistor: http://www.amazon.de/JMT-Thermistor-Res ... istor+100k
They weren´t shipped yet but i think they´re worth a try for about 2€.

If a thermistor doesn´t work, the board won´t heat anything for protection.

Regarding to your LCD-problem, i had a similar problem when i replaced my v2.1 board with a v3.0 board. I forget to adjust the trimmer that sets the current for the display. After I´ve set it to the correct position, it worked fine. Maybe you did the same.

Re: Need help before first print - No Heat

Posted: Mon Jun 16, 2014 4:20 am
by Inkrig
Thank you Legion 2.3. It was a case of me working on the assembly for too long and not being thorough. After checking my wiring for the 100th time I scrolled back through the log and realized that as soon as the system detects the bad sensor it only allows "Dry Run" mode until the next restart. I must have changed to the spare temp sensor without doing a restart on the system the first time. After changing the temp sensor again and restarting the system the printer is working just fine with the USB cable. Marc from Felix replied to my message quickly and gave me a couple of ideas why the display is not working. The adjustment as you said but also the potentiometer might have been touching the electronics board within the display. I have made sure that there is clearance between the items now but I can not test it for a few hours because I have an item printing now.

Thanks again,
Marc

Re: Need help before first print - No Heat

Posted: Mon Jun 16, 2014 5:56 am
by Inkrig
I had to wait for the printer to stop printing a part before I could test the display issues Marc mentioned. I think that I had both problems. It looked like the potentiometer may have been touching the board but after I made sure there was clearance between the two pieces I still needed to adjust the screw on the board. I looks like everything is just fine now.

Thanks again,
Marc