Posts made by oogway

Calibrating the extruder was the missing step, thanks for save dc42!

I have not, i must have missed that step during the initial setup. I'll calibrate it and report back the results.

Hey all,

These are my first prints and they are coming out super jagged. I've tried messing with different extruder speeds but it doesn't change much. My Delta moves super quick when printing. Not sure if that is the cause… anyways. The prints are below. What does it look like to you?

Here is my config file if that helps.

Configuration file for T3P3 Kossel XL with Duet WiFi: https://postimg.org/gallery/2gl47q47k/

And the pictures of my prints. https://postimg.org/gallery/3c054p24m/

Just to confirm, it was my thermistor. I replaced it and it heated up immediately. Thanks for the help everyone!

@T3P3Tony:

The Hotend PCB is on Github here:

https://github.com/T3P3/KosselHotendBoard

It certainly sounds like a new thermistor is the most likely.

Awesome, I'll start there. Should i replace both wires coming out of my hotend? or just the thicker red one?

Does anyone know where i can find the hotend pcb? I tried looking on the E3D website and the Think3dprint3d website but did not see it.

Was also wondering this…since my hotend pcb still powers on my 2 fans connected to it...is it safe to assume that it's ok? I'm now thinking it's just the thermistor that needs to be replaced..

So i measured the pictured black and green wires and got a resistance of .010 when the mm is set to 2M. Hope that's normal.

https://postimg.org/image/qfql2u489/

I measured the resistance of the thermistor plug (link to picture in a previous post) and got the same .0l reading.

Thanks for all of your help so far everyone. I'm a total noob. lol

@T3P3Tony:

Sounds like you have a faulty thermistor or faulty wires between the board and the thermistor on your hotend.

Ok I'll look into replacing the thermistor. Is it possible I blew that little board that sits above the hotend? The one i plug everything into.

I ended up stripping the wires just to be sure. Still same error message.

@dc42:

You could put wires in the connector holes and measure between those.

I put wires into the holes as far back as i could and measured but still get a reading of .0L. Perhaps i'm measuring it incorrectly? I used speaker wire and made sure to stick them in as far as they would go.

@T3P3Tony:

So just to be clear you should have 2 thin wires and two thick wires coming from your hotend. Then another 4 wires (probably black blue green red) coming from the e3d titan motor. Ignore the 4 wires coming from the titan motor. Check the resistance across the two thin thermistor wires where they plug into the board, but with them not plugged into the board. If you get similar readings to those you already mentioned then you have a short circuit on your thermistor

Ok so the 2 thick wires are what i originally tested and what gave me the numbers that jump around.

The 2 thin wires i'm not able to test because of the connector they go to, i tried sticking my multimeter sticks in the 2 holes but didn't get a reading. Should i cut the wires off from the connector to get a reading from the bare wires?

I've attached a picture just to show what i'm talking about.

https://postimg.org/image/dqe59walv/

@sigxcpu:

There is no extruder thermistor. There is the hotend thermistor.
The 4 color wires from Titan are the motor wires. You need to measure the two wires (either white or red/black) coming from down below, inside the heater block where the nozzle is.

Gotchya, measuring those 2 wires from my hot end i got a range of numbers. I listed a few of the ones in an above post.

@T3P3Tony:

Those thermistor values are so low - looks like the multimeter just picking up noise. You are looking for values in the region of 100K for a 100K thermistor.

Do you get the same readings of for the extruder and bed thermistors?

If not then what temperature for the bed is displayed when the bed thermistor is plugged in?

I'm not sure how to test the extruder thermistor, there's only a white connector with 4 different color wires coming out of my extruder. ( E3D Titan ).

When my bed is plugged in and reading from the duet wifi control, the temperature is 34 Degrees Celsius.

Thinking maybe my hotend board might be burnt out?

The interesting part is that even though the heat bed has a short it heats up just fine, it's the hot end that doesn't heat up. What else can i check for to diagnose the hot end issue?

Thermistor values on the hot end jump around from .338, .466, 1.326, and about 10 other numbers. The measurements of resistance were taken from the heat bed while it was completely removed from the printer.

@T3P3Tony:

Can you describe how the thermistor values are jumping about. What values do you get and do they change when everything is still or only when you move/touch the hotend/bed

0 Ohms on the heated bed indicates a short circuit. I would expect about 1Ohm for a "standard" heatbeds on a 12V system

I'll have to record all of the readings i get from the thermistor but i made sure to be steady and accurate with it. If this heat bed is indeed shorted, what would the next step be? Replacement? Thanks for your help so far.

Ok, so i started measuring resistance between different points.

Measuring Thermistor the readings jump around quite a bit.

I did however measure the resistance of my heated bed from the two red wires and it was .000. Is it possible my bed is the culprit?

Thanks for the reply, forgive my ignorance but how can i go about checking for a short with a multimeter?

Hello all,

I'm receiving the error message "temperature reading fault on heater 1: open circuit". I replaced the fuse with a .25 amp fast acting fuse and 5 x 20 fuse holder, but that didn't work. I made sure to solder the fuse to the same spot user "cap" did in this thread: https://www.duet3d.com/forum/thread.php?id=247. This is on my new kossel XL with the duet wifi. Everything was working fine until i replaced one of my fans on my hotend. I accidentally had it wired wrong and it burnt out the fan. Though the hot end was still heating up fine. It wasn't until i got the new fan, replaced it, that i started to get the above error message. When i checked my hotend for a short i indeed saw that the back of my z sensor board was touching the hotend. Fixing that and the fuse i assumed would be the end of it but the message remains. Even after resetting the hotend in the duet web control with command M562 P1.

thoughts?

Hello all,

I'm receiving the same error message "temperature reading fault on heater 1: open circuit". I replaced the fuse with a .25 amp fast acting fuse and 5 x 20 fuse holder, but that didn't work either. I made sure to solder the fuse to the same spot user "cap" did in this thread: https://www.duet3d.com/forum/thread.php?id=247. This is on my new kossel XL with the duet wifi. Everything was working fine until i replaced one of my fans on my hotend. I accidentally had it wired wrong and it burnt out the fan. Though the hot end was still heating up fine. It wasn't until i got the new fan, replaced it, that i started to get the above error message. When i checked my hotend for a short i indeed saw that the back of my z sensor board was touching the hotend. Fixing that and the fuse i assumed would be the end of it but the message remains. Even after resetting the hotend in the duet web control with command M562 P1.

thoughts?