Delta z height AC Predator

jay_s_uk

These are the type you'd need.

Gary

@jay_s_uk
Thanks for the link.

I still don't understand how config override has H456.513 as below
M665 L440.000:440.000:440.000 R224.891 H456.513 B185.0 X-0.442 Y-0.213 Z0.000

And doing a Homdelta, (with it being edited to just home), the web interface shows z 456.42. Am I missing something?

jay_s_uk

@Gary
Whats in your homedelta file?
Are you doing the home after any sort of probing or is this as soon as the machine is turned on?

Gary

@jay_s_uk
Soon as printer turned on. No probing. There's stuff edited out in there that needs deleting, but Homedelta below;

; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v2 on Tue Feb 26 2019 21:31:01 GMT+0000 (Greenwich Mean Time)

G91 ; relative positioning

G1 S1 X490 Y490 Z490 F1800 ; move all towers to the high end stopping at the endstops(S1 checks for endstops) (first pass)
;G92 X0 Y0 ;force this to read 0,0
;G92 Z456.747

;below 3 comment/uncomment
;G1 X-5 Y-5 Z-5 F1800 S2 ; go down a few mm GARYuncomment (S2 - Ignore endstops while moving. Also ignore if axis has not been homed.)
;G1 S1 X10 Y10 Z10 F360 ; move all towers up once more (second pass) GARYuncomment
;G1 Z-5 F6000 ; move down a few mm so that the nozzle can be centred GARYuncomment

;G1 Z-10 F1800 ;need to move down for x0 y0 to complete
;G92 Z456.747

G90 ; absolute positioning

;G1 X0 Y0 F1800 ;force to centre
;G92 Z456.747

Gary

Normal Homedelta below
Below obviously moves z height. It becomes 441.42

; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v2 on Tue Feb 26 2019 21:31:01 GMT+0000 (Greenwich Mean Time)

G91 ; relative positioning

G1 S1 X490 Y490 Z490 F1800 ; move all towers to the high end stopping at the endstops(S1 checks for endstops) (first pass)

;below 3 comment/uncomment
G1 X-5 Y-5 Z-5 F1800 S2 ; go down a few mm GARYuncomment (S2 - Ignore endstops while moving. Also ignore if axis has not been homed.)
G1 S1 X10 Y10 Z10 F360 ; move all towers up once more (second pass) GARYuncomment
G1 Z-5 F6000 ; move down a few mm so that the nozzle can be centred GARYuncomment

G1 Z-10 F1800 ;need to move down for x0 y0 to complete

G90 ; absolute positioning

G1 X0 Y0 F1800 ;force to centre
;G92 Z456.747

jay_s_uk

One thing I have noticed is your endstop adjustments in M666 are a lot larger than mine

M666 X0.081 Y0.238 Z-0.319 A0.00 B0.00

What 'S' value are you using at the end of your bed file?

Gary

@jay_s_uk
I'm sure it's your bed file with S6

jay_s_uk

Try overriding the M665 and M666 values and then reprobe.
I.e. resend whats in config and then probe

Gary

@jay_s_uk
Yeah I did that before. I deleted config override and re-probed, but I've noticed that re-probing overwrites the M665 and M666 values in the override file. Worth another try though. When you said your endstop adjustments were smaller than mine by how much?

jay_s_uk

@Gary

The code I included is my endstop M666.

As you can see, my X is 0.081. Yours is -6.790

jay_s_uk

I don't know how yours can be so different unless the original owner messed with the little metal flags on the top of the carriages.

Gary

@jay_s_uk
The flags look/feel the same as my other stock machine. I'll need to get to the endstops as that's a huge difference.

Just done another re-probe and similar results.
M665 L440.000:440.000:440.000 R224.513 H456.388 B185.0 X-0.646 Y-0.364 Z0.000
M666 X-6.930 Y3.322 Z3.607 A0.00 B0.00

jay_s_uk

I would investigate your X endstop then as its 10mm different to your Y and Z enstops

Gary

@jay_s_uk
Yes. Got my finger under all of them and one is maybe a 0.5/1mm higher, not 10. Disassembly required. Never seen an endstop could it be upside down?

Gary

@jay_s_uk
I got the error " Warning: the height map was loaded when the current Z=0 datum was not determined probing. This may result in a height offset." Just wondered if the problem could be anything like the link below?

https://forum.duet3d.com/topic/10835/z-0-datum-was-not-determined-probing/3

I can kind of see that having both a Z endstop switch and a Z probe could cause a problem, as the z tower is not the z height.
Mine Firmware is: RepRapFirmware for Duet 2 WiFi/Ethernet 2.04 (2019-11-01b1)

Have you got the same firmware version?

jay_s_uk

@Gary

I wouldn't worry about the message around the height map just yet.

If you're going to stick with RRF2 for the moment, I would be upgrading to 2.05.1
I'm on the latest RRF3.01 release and I use conditional gcode in my bed file.

You need both a Z stop and a Z probe. The Z stop is set at the maximum end to signify its at the top of the tower. The firmware knows that the Z stop is for the Z tower and will treat it accordingly.

Gary

@jay_s_uk
Will update the firmware. It was just a thought as X-6.790 and my probe offset of 5.52 gives 1.27mm which would correlate roughly to what I felt with my finger maybe.

jay_s_uk

@Gary

What do you mean your probe offset is 5.52? In your config, your Z probe offset is 17.656

Gary

@jay_s_uk
Sorry I meant initial hot end paper touch before using probe. z=0 at this height.

Gary

Updated, checked all endstops/tabs and they all look okay. Similar distances and wiring the same. Just done another probe and config override as below.

M665 L440.000:440.000:440.000 R227.000 H456.747 B185.0 X0.000 Y0.000 Z0.000
M666 X0.000 Y0.000 Z0.000 A0.00 B0.00

That can't be right all zeros. I did notice that the first probe was not in the center of the bed - 10ish mm out.