AM8 config issues - cannot home any axis

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.

Thoemse

@veti
Thanks. Yep the Thermistor is dead out of the box. Plugged in a different one and it reads room temp.
I got some teething issues on this one.
Thanks.

Veti

cut the cable at the crimp contact, and measure again. it might just be a bad crimp job.

Thoemse

Apparently the thermistor was screwed in too hard. The set screw put too much pressure on the wiring. It works now.
Pid tuning the hotend now. Weeee!
Sure had some hurdles on the way on this one but the DuetWifi really grows on me. I love the webinterface and the fact I can modify the config via interface - that's brilliant.

Thoemse

Thanks to all of you my carthesian is printing now. Currently tuning acceleration and jerk. I also need to center the pritnbed still as you can see.

Making good progress though. If this goes will I might upgrade my delta to a Duet too.

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Thoemse

Last update on this topic.
It is dialed in now and it is fantastic.
I wont use any other board on any printer from now on.

It's a simple cartesian but wow does it print well.
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