XYZ printer extruder not heating up properly. (Page 2 of 3)

N/P x-ray,

You have no idea ... I lost my mind last week,
I am so glad you solved this issue. You should be humming along for awhile.

Ps. I recommend purchasing

1. A couple the thermoresistors, (thin cable that goes to your extruder, Mine is okay but you never know) these are very inexpensive and can be found for less than a buck ea.

2. Ceramic Heater Core (red wrapped double cable, heater cylinder) this just crapped out on me and unavailable locally! I live in NYC and not one store sold these. We have 4 3D printer specific stores which includes Makerbot. Nada.
A 5 pack is 16 bucks from amazon (thank you next day shipping)

3. Another Davinci (just in case)

My heater died 88 days after purchase. It took about four days of back and forth messages to convince xyz of that--then they said sorry it is out of the 90 day warranty. It took another four days to point out that I had submitted the trouble before the warranty expired. Long story short, they had me remove the heater and return it. Two weeks later I am still waiting on the replacement to get here. In the meantime I ordered and installed one of the 40W ones off of eBay and it works great--better than the factory one.

I have the same problem with my printer which I bought in mid-Decemer. It has about 130 hours on it. Is there a solder free option for replacing this connector? I saw some conductive glue at radio shack, for example. or would binding the connector tightly with electrical tape be a possible fix? I don't know how to take this connector apart. And I'm not at all good with a soldering iron (whiff of burning skin...)

I replaced the extruder heater with the 40w and blew out a transistor on the logic board. It looks like the transistor got too hot.

I stopped getting voltage from the board and found a spot above the transistor where I get ~1v when the heater is supposed to be on and wired in an arduino to detect the voltage and activate a 5v relay using a Letex LA213 optoisolator that I found in some e-waste.

Thought I should warn you.

Had same problem as all above. XYZ sent replacement heater and new harness has anyone remove the harness from back of printer? How do you get to the bundle of wire behind the bed.(maybe I must have short arms :-))

You guys might be the answer to my prayers.  When I disconnect/reconnect the heater connector, the extruder works. Once.  On the next cycle, it won't reheat again unless I dis/reconnect again.  Does that sound like a bad connector to you guys?

If it is, I'll have to find an electronics repair shop near me.  No way do I trust myself to rock new connections.

Thanks

*****Update*****
I had three DaVinci's go down and this was the reason for all three.  I don't trust myself with a soldering iron so I took all 3 to a computer repair shop.  I just had the guy there cut the connector and just solder the wired together.  They're all working like new.

You guys were a lifesaver.

So I know it's been a while since my last post I've been busy, I finally got my connectors replaced with the vinyl bullet connectors. they're making contact but my extruder still won't heat past 25C it's quite disheartening. Is there anything else I can check or replace to see what could be causing it?

unfortunately I don't have hardware to check the voltages, I'm not even sure what to buy for that. I really like this printer It would be a shame for me to have to scrap it. when it was working it worked good. The wire is crimped in nice and tight. I had my grandfather come over and help with it because he used to do electrician work. My friend who was supposed to help would always have an excuse.

Hi guys.. same Problem but different cause:

My extruder stopped heating up. I tried fixing the connector but no luck. It seems the motherboard is not sending electricity to my heating element. I then tried the following:

I found a 35w/12 v electricity source and connected the heating element... and voila it heated up... But of course. it heats up way too much as it is not regulated by the printer which tracks the temp.

Does anyone have any idea how I can fix this problem? Pleeeaassseeeee.... Thx a lot!

not really, since it is a heating problem... not a clogged nozzle problem. wont heat up from the printer itself... or would leaning the nozzle help with no power going to the heating element????

I asked this quetion for diagnostics. If you clean the nozzle while powered with the brass brush you cause a short that blows the zero ohm protection resistors at the heater output on the mainboard. It is a common mistake and common issue with these printers due to their hotend design.

Oh.. I see.. yes. that could definitely be a reason for this.

Is this fixable?

Depends on your soldering skills with surface mound components. The bad resistors need to be removed and then new ones which can be ordered from mouser or digikey put back in . But it does require surface mount soldering and desoldering skill.