Trouble with Firmware Values/printing

[batman]

Hello,

I am trying to get my printer to print and cannot seem to despite my best efforts. I have finished building, I have measured and found the height of my z-axis but after these steps nothing else seems to be intuitive.

I know the height of my printer, which I have put into the firmware under: Manual z home pos, however I do not understand what else needs to be added to the firmware because the other steps don't give me values.

For instance, setting the 3 probing points after homing, my values seem close (using a ruler to check) but the hotend is still 1mm or so away from the bed, do I need to do anything with the firmware and if so, where?

I also do not understand this step:
8 Define the Z_PROBE_OFFSET
You can calculate the Z_PROBE_OFFSET values with this procedure:
Put down the prob. Manual y move the print head down slowly, place the probe at the
center of the print bed. When you hear the trigger of the endstop, you can get the
coordinate on the Repetier host. In my case, it is【-20.35,11.75,0.3】, you can add it to
the following settings.
#define X_PROBE_OFFSET_FROM_EXTRUDER 20.35
#define Y_PROBE_OFFSET_FROM_EXTRUDER -11.75
#define Z_PROBE_OFFSET_FROM_EXTRUDER -0.3
//these are the offsets to the probe relative to the extruder tip (Hotend - Probe), these
values are very important, especially the Z_PROBE_OFFSET.
Then modify the Z_PROBE_OFFSET in the firmware

I do not get those values when my endstop is triggered, I get the same value for x, y and z; I have tried entering m114 to see the values, not sure if that is what Im supposed to do.

also entering g29 seems to nearly break my extruder/hotend because the hotend hits the bed. I do not want to proceed without help. Simplified help.


Here is the thing, I was mailed a printer with a missing piece which I have still not gotten, so I went out and got one myself. Then my hotend just melted, but I went out and got one myself. All of this occurred within 2 weeks and now it is almost a month I've had this printer. Everyone I ask for help gives me a link to the wiki page or passes me onto the next person or says they need more information.


Please help.

[Mark]

"setting the 3 probing points after homing, my values seem close"
This values are used to keep the center point and its around point in one plain, so you didn't need to change anything in the firmware as long as your initial Z axis height is precise enough.
"I do not get those values when my endstop is triggered, I get the same value for x, y and z"
Did you mean the values were not show in the console of the repetier host? how about the LCD controller?
And to do this you should manually control the Z axis to move the probe down, and do not move it in X or Y directions.

[batman]

Move the z-axis manually? Using the repetier host controls or the LCD controls of the G2? I do not get any x and y values showing on my lcd but if I do I just wanna know how to proceed. My hotend still hits the bed when I try to send command G29 and nearly scratches if i dont turn it off in time.

[Mark]

You can manually control the Z axis down here at the manual control menu, and record the coordinate here.
As for the hotend hits the bed, you should notice that the coordinate you got on the repetier host, its not the same value to set in the firmware, they should be reversed in sign.
You can see the example here: the blue value and the red ones are just the opposite in sign.

"In my case, it is 【-20.35, 11.75, 0.3】, you can add it to the following settings.
#define X_PROBE_OFFSET_FROM_EXTRUDER 20.35
#define Y_PROBE_OFFSET_FROM_EXTRUDER -11.75
#define Z_PROBE_OFFSET_FROM_EXTRUDER -0.3"

[batman]

Hi Mark, I do not get values for x and y axis when I manually move my z-axis using repetier. I only get the value for my z-axis. From the picture you've shown I should be looking at screen on the repetier.

[Mark]

Sorry, I think I made a mistake. "Manualy move the print head down slowly, place the probe at the center of the print bed."
That means you should manually move the probe to the centure point of the bed, so there will be X and Y shift , and the shift will be the coordinate you want.