ah . . . that totally makes sense. A few questions:

1.at each point: I assume i got to be within 20 to 25 microns repeatable or i've got something mechanical to fix?
2. I assume i have to probe center first. . . .
3. in my bed.g I've got the following example:

[[language]]
G30 P1 X77.13 Y91.93 Z-99999 H0

Where H = (trigger height at that point) - (trigger height at center point).
Why wouldn't i just use the trigger height stand alone? Wouldn't this double up the trigger height?
What do i do about Z? do i leave it at -99999

4. does the bed have to be hot?

Fixed my temp/heater issue . . .

Now I'm having a heck of a time trying to get my delta calibrated. Its a modified rostock max. I've torn it down and rebuilt it a dozen times to see if maybe i got something wrong mechanically.
I use FSRs to probe.
I've added PEI to my boro glass plate.

So here's my process. . .

Added in my config.g

[[language]]
M558 P4 X0 Y0 Z0 H3 F50 T6000 to probe (super slow)
M557 R135 S15 enables grid probing map

Added to Bed.g

[[language]]
bed.g file for RepRapFirmware, generated by Escher3D calculator
; 16 points, 6 factors, probing radius: 120, probe offset (0, 0)
G30 P0 X0.00 Y120.00 Z-99999 H0
G30 P1 X77.13 Y91.93 Z-99999 H0
G30 P2 X118.18 Y20.84 Z-99999 H0
G30 P3 X103.92 Y-60.00 Z-99999 H0
G30 P4 X41.04 Y-112.76 Z-99999 H0
G30 P5 X-41.04 Y-112.76 Z-99999 H0
G30 P6 X-103.92 Y-60.00 Z-99999 H0
G30 P7 X-118.18 Y20.84 Z-99999 H0
G30 P8 X-77.13 Y91.93 Z-99999 H0
G30 P9 X0.00 Y60.00 Z-99999 H0
G30 P10 X51.96 Y30.00 Z-99999 H0
G30 P11 X51.96 Y-30.00 Z-99999 H0
G30 P12 X0.00 Y-60.00 Z-99999 H0
G30 P13 X-51.96 Y-30.00 Z-99999 H0
G30 P14 X-51.96 Y30.00 Z-99999 H0
G30 P15 X0 Y0 Z-99999 S6
M561
G28 

```;

I will then probe and run the M665 and M666\.
enter in the variables in the config g and do it again until they converge. . . (i do this both hot and cold and not much difference)
here are some runs:

Run 1
Endstop adjustments X-0.08 Y-0.05 Z0.13, tilt X0.00% Y0.00%
Diagonal 269.000, delta radius 129.521, homed height 431.005, bed radius 125.0, X -0.107°, Y 0.350°, Z 0.000°
Run 2:
Endstop adjustments X-0.07 Y-0.08 Z0.15, tilt X0.00% Y0.00%
Diagonal 269.000, delta radius 129.471, homed height 431.006, bed radius 125.0, X -0.172°, Y 0.352°, Z 0.000°
Run 3
Endstop adjustments X-0.08 Y-0.06 Z0.14, tilt X0.00% Y0.00%
Diagonal 269.000, delta radius 129.558, homed height 431.013, bed radius 125.0, X -0.145°, Y 0.367°, Z 0.000°
Run 4
Endstop adjustments X-0.05 Y-0.07 Z0.13, tilt X0.00% Y0.00%
Diagonal 269.000, delta radius 129.538, homed height 431.019, bed radius 125.0, X -0.080°, Y 0.363°, Z 0.000°

After I feel my readings are just going up and down, I go through bed compensation.

added to config.g

[[language]]
G29 S1 ; load bed leveling compensation

Run G32 without homing
Run G29

A nice graph pops up with this.

[https://ibb.co/cFaNuv](https://ibb.co/cFaNuv)

So here's the problem:

[https://ibb.co/bOSrnF](https://ibb.co/bOSrnF)

What in the world is going on. Its like I never calibrated . . .
I can't be that far off the mark.

A couple of things. I do adjust my G31 command in my config.g

[[language]]
G31 X0 Y0 Z0.1 P500

I vary Z in 0.025 increments hoping to find a sweet spot. The issue is it doesn't matter because its clear I'm high in one spot and low in another. Isn't bed compensation supposed to fix this?

Please help.

Duet Wifi running 1.15 firmware
Rostock Max V1 with E3D Cyclops hot end
850Watt High quality (OCZ) converted CPU power supply
2 Greg Wade type extruders (bowden setup)
Printing ABS at 250C, no layer fan.

Having issues with my hot end. At first i thought it was a tuning issue.

I have to run M303 H1 P0.7 S260 to hit max temp of 259C
I am able to run the same command and get similar results
I then put those numbers in my config.g with the M307

The problem i'm having is I can reach 240-250 with no issues. Its very stable with no ocillations in the graph. I can leave it like this for sometime with little deviation. I can bed calibrate with this and no issues.

However when I start to print about the 1-2 layer or so I occasionally get a high temp excursion. Its more frequent the higher the temp i go.

Not sure whats going on. Thoughts?

My delta printer is running, seems to extrude, move, ok Temps are calibrated per instructions.

I've been able to run the auto calibration (added some additional probe points) but find that after calibration the nozzle is a bit too close to the bed. This causes the extruders to back up since it can't push an plastic through the nozzle thanks to how close the nozzle is to the bed.

Is there a way I can adjust the overall distance of the nozzle to the bed after calibration?

I see a G31 command but not sure how it works.

G31 X0 Y0 Z4.80 P500

Do I adjust my Z? through this command? Does this mean that after the probe has been triggered its assuming Z 0 is at 4.8? Is 4.8 Steps?

Please help, very close to getting my printer finally running.