AM8 config issues - cannot home any axis

dc42

Have you tested your endstop switches? It sounds to me that you have configured or wired them incorrectly.
https://duet3d.dozuki.com/Wiki/Connecting_endstop_switches#Section_Test_endstop_switches

Two Z motors in series may be OK on 12V, depending on the type of motor.

Thoemse

@dc42 homing doesn'
t even get to the endstops. The z motors run uneven. First one than the other with a horrible grinding noise because x axis gets uneven as result. It is not a mechanical issue though.

dc42

Please post your config.g file as @Phaedrux requested.

spunone69

I just got my Duet Wifi setup as a CoreXY and its doing the EXACT same thing! I can open Pronterface or Simplify 3D and move the axes in any direction, but when I home any of them it moves Z up and down and X or Y moves only a few millimeters...what is the issue?

spunone69

And if I try to home Z it just goes up and down once or twice...

Thoemse

Ok. Z motors run ok now that they are not in series anymore.
Homign does not work at all though. Homing X and Y moves Z axis still.
Homing Z axis runs the axis down into the switch that does not work and it keeps on running intothe switch - the switch actually died broke this.0_1545766351395_config.g

Veti

thats why dc posted the link. use the m119 command to test each endstop manually first.

Thoemse

@veti
Yeah makes sense. But can you see faults in the config.g?
I am far from anything workable. The hotend throws out a fault. The fans have no power (allways on fans as well - 12V fans, 12V PSU).
No endstops. A moving Z axis when tryign to home X or Y. I don't even know where to start really.

I never had trouble with marlin but this leaves me puzzled.

wilriker

So, unless you have also changed the lead screw then your steps/mm for Z are 10x too high. They should be set to 400.

Also your steps/mm for X and Y are too low if you did not replace the pulleys by 20T versions. Original Anet A8 has 16T resulting in 100 steps/mm.

Then there is no endstop for Z configured at all. And the one for Y is set to active high where default Anet wiring of the endstop is active low.

The original Anet motors run on Z in series - that's how I had mine running for months also with the original 12V PSU.

Veti

M574 Y1 S1 ; Set active high endstops
M574 X1 S3 ; Set endstops controlled by motor load detection

Normally the a8 switches are NO if i remember correctly. You configured NC for Y.
X is stall detection and not via switch. Is that correct?

Check the wiring on the fans. if you swapped them the wrong way the fuse might be blown.
See https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_fans
. If you connect the fan the wrong way round, you may damage the fan, the Duet, or both.

Thoemse

@wilriker

Thanks a lo. I will look into it. The Endstops were the wrong way round. Fault number one solved as well.
Sorry for my stupid questions. I am new to this. I thought the basic config of RFF config tool will get me somewhere. I found no basic values to start with for the anet.

X stall detection is because one switch died. I just fixed it though - back to endstop.

wilriker

@thoemse The easiest way to get the correct values is the use Marlin's appropriate Configuration.h and Configuration_adv.h. These have all the working values in there.

But this reminds me again that I wanted to create a template for Anet A8 in RRF Configurator. But that will probably only happen at the beginning of next year.

Thoemse

@wilriker
Changed steps. Thank you.

Edit: Fantastic. Making progress. All endstops working. Axis are homing.
Now On to the hotend and the no power on fans issue. I shall read up on it first though. I went at this a bit to unprepared.

Thanky ou very much btw. I am starting to get the hang of it.

Thoemse

Fixed the fan. I got an issue with z homing. It tries to home on top but I got a min Z endstop.
Considering it lifts z correctly before homing X and Y I think the Z axis direction should be correct.

I've added the z homing file.

I am sorry for all the questions.0_1545818773565_homez.g

wilriker

@thoemse said in AM8 config issues - cannot home any axis:

Considering it lifts z correctly before homing X and Y I think the Z axis direction should be correct.

What happens if you issue the following commands?

G91
G0 Z5 H2
G90

It should move up 5mm. If it moves down then the direction is reversed.

Warning: this will try to move 5mm ignoring endstops.

Your homez.g looks good although

G1 Z5 F6000 S2    ; lift Z relative to current position

is unnecessary and

;G90              ; absolute positioning

should rather not be commented out to avoid issues with anything expecting absolute positioning.

Thoemse

Thank you. I will try that.
I can't use thos commands. Insufficient axis homed. Only works after homing I guess? I managed to fix it now. All axis homing against endstop fine.

Thoemse

Closing in to get it running. Axis Home. Endstops work. Fans work. Bed heats.
Only the hotend keeps bugging me.

It's a 3d Freunde e3d Full Metal Hotend.

I get the error: Heater 1 fault (T0) - 2000°C

I tried the original E3D thermistor values. I tried the values that work for the 3D Freunde Hotend in Marlin (B 3950) but all I get is a heater fault.

The thermistor and heater are wired to E0.

Heatbed works fine. Pid tuning it right now.

Veti

before you try to heat the hotend see if the thermistor reads room temperature and changes by externaly heating it (hand body temperature)

Thoemse

Thermistor always shows 2000 C.

Veti

check that you have connected it to the correct plug, then measure the resistance of the thermistor using an ohm meter.