Noob building a HEVO in need of help.

DIY-O-Sphere

@Quattro said in Noob building a HEVO in need of help.:

Do I select not assigned here if i want to use sensorless?

For me it seams to be right. But I have never set up a system with sensorless homing.
So you better should read her
https://duet3d.dozuki.com/Wiki/Stall_detection_and_sensorless_homing

DIY-O-Sphere

@Quattro said in Noob building a HEVO in need of help.:

Should i change this if I am going to use a fan for part cooling and one fan for the extruder heat sink?

That is set as standard. FAN0 is for part cooling
FAN1 is for the hotend. Configured like that the fan will start to rotate when then hotend reaches 45 °C

DIY-O-Sphere

@Quattro said in Noob building a HEVO in need of help.:

Should the maximum values be changed to 300 - 15mm offset on both X and Y axis? This seems to only measure some of the bed.

That is depending where you will mount the probe.
Normaly the probe sits on the side or behind of the hotend.
So if the aera is set to big it could go beside the bed.
I would keep the sandard values and adept them when the printer is set up.

DIY-O-Sphere

@Quattro said in Noob building a HEVO in need of help.:

Do i select sensorless on X and Y? What kind of Z-probe is NPN? "Simple modulated IR probe?"

I think switch will generate the proper value for M558 (should be P5)

https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_NPN_output_normally_open_inductive_or_capacitive_sensor

To invert the signal in config.g, you have to do that by hand..
For RRF3 the code should look like this
M558 P5 C"^zprobe.in" H5 F120 T6000
(^ inverts the signal)

For a detailed description how this kind of probe is working, read her
https://forum.duet3d.com/topic/2133/connecting-the-z-probe/6

Quattro

I got new problems with the new config.

1: The bed gets a heat error. It does heat some seconds, and then stops. This did work with the old config.
It is heating up if i remove "M307 H0 B0 S1.00 ; disable bang-bang mode for the nozzle heater and set PWM limit"
Should i remove it or change som parameters?
2020-01-13 21.48.42 (Copy).jpg
I also get a warning for "over-powered."
2020-01-13 22.12.37 (Copy).jpg
2: How to i test the probe? The distance is "0" when i run G31. Even with a object placed under the probe.

3: Can I use this for sensorless homing? Or does it need a update for firmware v3? It is from my friends HEVO with firmware V2. Should this be placed in the config.g or one of the other files?

; Endstop configuration -----------------------------------
M574 Z1 S2 ; Set endstops controlled by probe
M915 Y S1.5 R0 F1 ; Higher S = less sens
M915 X S1.5 R0 F1

The Z-axis seems to move the right amount now.

DIY-O-Sphere

Please post the complete config.g

Quattro

@DIY-O-Sphere

New config.g
I forgot and was about to post it. Here it is.

DIY-O-Sphere

Your config is for RRF3

Quattro

@DIY-O-Sphere

Isn't that right?

Quattro

The config for the probe says "P5 (from RepRapFirmware 1.14) selects a switch by default (normally closed) for bed probing between the In and Gnd pins of the Z-probe connector (Duet 0.8.5 and Duet 2 WiFi)."
But I have it the + and GND connected to a fan output and the "Z Probe in".

blt3dp

For the bed.

Looks to me like your bed heater needs to be tuned.

M303 H0 P1.0 Swhatever temperature you usually print

Then take the values it returns and put it in the M307 in your config.g as the A, C, and D parameters.

DIY-O-Sphere

Try this for the probe
; Z-Probe
M558 P5 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to switch and the dive height + speeds

Why have you uncommented that ?
;M307 H0 B0 S1.00
Delete the ;

DIY-O-Sphere

@Quattro said in Noob building a HEVO in need of help.:

100 kohm NTC3950 thermistor

Check what thermistor is really used for the bed. I think it's not the correct one.

DIY-O-Sphere

@Quattro said in Noob building a HEVO in need of help.:

The sensor is connected like this, but the power goes to the 5V ext/fan output.

I'm not shure where you have puged power of the probe.
I would suggest to plug it in the +5V for PanelDue

And also check if the diode is in correct direction.

Quattro

@blt3dp said in Noob building a HEVO in need of help.:

For the bed.

Looks to me like your bed heater needs to be tuned.
M303 H0 P1.0 Swhatever temperature you usually print
Then take the values it returns and put it in the M307 in your config.g as the A, C, and D parameters.

Heater 0 model: gain 129.7, time constant 343.8, dead time 1.0, max PWM 1.00, calibration voltage 23.7, mode PID
Computed PID parameters for setpoint change: P463.5, I24.749, D331.1
Computed PID parameters for load change: P463.5, I93.008, D331.1

Like this? M307 H0 A129.7 C343.8 D1.0 V23.7 B0

@DIY-O-Sphere said in Noob building a HEVO in need of help.:

Try this for the probe
; Z-Probe
M558 P5 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to switch and the dive height + speeds

Why have you uncommented that ?
;M307 H0 B0 S1.00
Delete the ;

Because the bed heating did not work with this command.

2020-01-13 23.10.07 (Copy).jpg
(Black cable) Signal connected to "Z PROBE IN"
2020-01-13 23.10.45 (Copy).jpg
(Brown and blue) Power connected to fan output (always on fan, measured 4.86V)
The probe does read "Current reading 1000, threshold 500, trigger height 4.000, offsets X21.0 Y0.0" with G31 now.

It's a cheap Chinese probe, so it might be crap, but I expect it to work.

@DIY-O-Sphere said in Noob building a HEVO in need of help.:

@Quattro said in Noob building a HEVO in need of help.:

100 kohm NTC3950 thermistor

Check what thermistor is used for the bed. I think it's not the correct one.

The bed is working after the PID adjustment.

DIY-O-Sphere

@Quattro
So I think the part where I could support you is working.

As mentioned I have never set up sensorless homing.
But I have realized that the stall detection M915 is missing in config.g
I think you have found that?
https://duet3d.dozuki.com/Wiki/Stall_detection_and_sensorless_homing

Quattro

Good and bad news. I got the probe to work. It is a 6-36V probe, not 5V as advertised. Its working on 24V. Should the non triggered value be "0" and the triggered value "1000"? The probe does not read thru the glass and down to the alu bed. Do i need to change to a BL touch? Is it reliable to manually adjust the springs on the bed and run without a Z-probe?

DIY-O-Sphere

@Quattro said in Noob building a HEVO in need of help.:

Should the non triggered value be "0" and the triggered value "1000"?

Detail of the guide:
"HIGH during probing, LOW at other times"
I would expect that is correct.
Have you tried to remove the glass and maybe stick some tap on the alu plate?

Edit:
I'm a satisfied BlTouch user

Quattro

I have attached the belt to the X Y assembly and I am trying to home the X-axis. I had to change the homex.g and congig.g according to https://duet3d.dozuki.com/Wiki/Stall_detection_and_sensorless_homing
But I can't figure out why the motor keep "skipping" for so long. After some time it is detecting stall and runs the next g-code. I did try a few S-values. I get G28 X Error: Homing failed.

Does anyone have a suggestion?

homex.g
config.g

dc42

@Quattro said in Noob building a HEVO in need of help.:

Good and bad news. I got the probe to work. It is a 6-36V probe, not 5V as advertised. Its working on 24V. Should the non triggered value be "0" and the triggered value "1000"? The probe does not read thru the glass and down to the alu bed. Do i need to change to a BL touch? Is it reliable to manually adjust the springs on the bed and run without a Z-probe?

NPN-output sensors are usually active low, so you need to invert the input to get a reading of 0 when not triggered and 1000 when triggered. How you do this depends on whether you are using RRF2 or RRF3.

Capacitive sensors can usually detect glass beds. Inductive sensors don't detect glass, and may have difficulty detecting aluminium below glass. They work best on steel and other magnetic materials.