@T3P3Tony I think I've read your article about the Kraken when I first looked into buying one.
So no mesh bed compensation for me then.
Thanks again for the help.

p0.9 did the Job
16:04:42M307 H0
Heater 0 model: gain 159.6, time constant 1084.6, dead time 50.7, max PWM 0.90, calibration voltage 24.1, mode PID, inverted no, frequency default
Computed PID parameters for setpoint change: P23.9, I0.102, D849.4
Computed PID parameters for load change: P

16:03:01Auto tune heater 0 completed in 1388 sec
Use M307 H0 to see the result, or M500 to save the result in config-override.g

15:46:21Auto tune phase 3, peak temperature was 64.5

15:45:22Auto tune phase 2, heater off

15:39:58Auto tune phase 1, heater on

15:39:52M303 H0 P0.9 S60
Auto tuning heater 0 using target temperature 60.0°C and PWM 0.90 - do not leave printer unattended

@fcwilt what i was hoping for was that i could put the locations of my belts in have it touch of near the belts do some calculations and be square, thats it. But now that i know that this is not possible i will try something else, but i still think that a function like this could be very usefull.

@fcwilt i will put them on the print head but this post was not about discussing where i want to put my endstops but to discuss options for compensative homing like the g30 for multiple leadscrews.

@fcwilt they are at the bottom of the corner pieces and are activated with a foot on the carriage and the entiere homing system is about 25mm high

@dc42 i currently have dual enstop mounts but want to have the mounts on the pint head in order to shorten the xy-motion systen by about 20mm in the z direction.

@phaedrux That is not the point, the unalignment is unknown which is why i want to do the resquaring every time i home the machine and the easiest way to do that is to measuare the points and after that to adjust for the difference which is what the g30 comand does.

@phaedrux exactly. i would love to have the points predefined so that the board can calculate the corection needed. Is that possible or would i have to do some remapping trikery to make the printer think the x axis is a z axis with two leadscrews and then do the same for y?

@jay_s_uk said in Dual x and y homing similar to g30 for multiple z screws:

@killernoy you could, in which case you just map them together in M584 and you're done.

Would there not be any issue of both motors getting out of sync?

yes, as i am building it unaligned the tention on the rods connecting the carriages with the print head will pull it back into misalignment.

@jay_s_uk what im thinking about is one end stop for both motors like a z probe for multiple z axis

I would like to have my machine home the x and y axis similar to my z axis which is homed like described here https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors
I have a design similar to the ultimaker machines but with independent motors on each side, that makes it possible to put two endstops on the printhead and home against the x and y carriages.
So my question is if this is possible or if i would have to home in the middle, split up the x axis, home again on each far end and then combine the axis again.

I want setup a Dummy heater so I Put this in to Config.g:

M308 S5 P"duex.e4temp" Y"thermistor" T100000 B4138 	; configure sensor 5 as thermistor on pin duex.e4temp
M950 H5 C"e6heat" T5 					; create Dummy heater and map it to sensor 4

I Tested Sensor 5 using M308 S5 and got this

M308 S5
Sensor 5 type Thermistor using pin (e4temp,duex.e4temp,exp.thermistor5,exp.37), reading 40.5, last error: sensor not ready, T:100000.0 B:4138.0 C:0.00e+0 R:4700.0 L:0 H:0

Now I want to know how I remove This Error