Issue with Ramps/Cura? modded XYZ DaVinci with Ramps1.4, Bowden e3d v6

check the wiring for the thermisistor.

Seems like your thermister is a bit loose.
In marlin you need to tweak the default axis steps per unit.
default axis step per unit (x axis, y axis, z axis, extruder)

steps/mm=(motor steps per rev∗driver microstepbelt)/ (pitch∗pulley number of teeth)

This is a cura issue. Try another host like Repetier just to confirm. The problem is in your start gcode which overrides preheat settings and such that are done from the LCD or machine control panel in cura. You also want to use an older version of cura like 10.5.

Thanks guys, It was Cura.... i tried repetier host and it works. My print quality is pretty gross right now... anyone have any ideas on how to calibrate or make it better? Im printing at 50mms at .3mm with pla running a layer fan. Current steps are Default_axis_steps_per_unit {93.74, 94.184, 2564, 145.513}

I have no idea what kind of belts are on the davinci, so i took the numbers from some other thread... he seemed to be having good results, except he had a different extruder, i have mk7 on the stock motor running a bowden setup... so i took 200x16 and then divided by 7 to get 145.513. It seems ok? I don't know if the stock da vinci motors are true nema 17s so its all guesswork. Gonna try to get better results with ABS when I install the 100k thermistor in the bed here in a few minutes.

Thanks again,
Andrew

50 is wayyyy to fast for s Da Vinci and way to fast for such a small item.

PLA retains heat much longer than ABS. Because of this you need to slow things way down so it spends time longer on each layer to allow it to cool more before doing the next layer.  A layer fan helps but you still need to slow down to 30 or less. You can also print more than 1 at a time of small items. If you only need one then print it with something else.