Hot end questions
- barry99705
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Hot end questions
Do thermistors and heater cartridges slowly go bad, or just all at once? In the last month or so, I've had problems keeping temperature. Yesterday I had two prints quit because it couldn't keep up. Printing with an e3d v2, .4mm nozzle, 50mm/s perimeters, 55mm/s infill. All this is wired through seeme's he280 accelerator board. I really wanted to like that hot end, but couldn't keep the fuse ferrules tight.
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Re: Hot end questions
Do you have a sock on the heater block?
g.
g.
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- barry99705
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Re: Hot end questions
Yep. Just for giggles I unplugged the part cooling fans and that helped a little, but it's still not keeping up.
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Re: Hot end questions
It wouldn't hurt to double check the hotend connections at the RamBo board,,,,
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- barry99705
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Re: Hot end questions
Yea, that was the first thing I checked. They're tight.
Never do anything you don't want to have to explain to the paramedics.
Re: Hot end questions
I'd almost suspect the power supply if it's a v2. Can you try monitoring the 12v rail while you're printing?
g.
g.
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- barry99705
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Re: Hot end questions
I'll give that a shot, will update later.
Never do anything you don't want to have to explain to the paramedics.
- barry99705
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Re: Hot end questions
Hot end connection bounces between 11.55vdc and 9.25vdc while printing. From the power supply I'm getting 12.31vdc.
Never do anything you don't want to have to explain to the paramedics.
Re: Hot end questions
The voltage makes sense at the hot end - it's the PWM you're seeing. The raw output from the power supply seems good though.
It may be a case of the heater cartridge beginning to fail. If it was ME, I wouldn't just change the cartridge - you figure if you're going to tear into the thing, might as well replace the thermistor at the same time and save some hassle.
g.
It may be a case of the heater cartridge beginning to fail. If it was ME, I wouldn't just change the cartridge - you figure if you're going to tear into the thing, might as well replace the thermistor at the same time and save some hassle.
g.
Delta Power!
Defeat the Cartesian Agenda!
http://www.f15sim.com - 80-0007, The only one of its kind.
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Defeat the Cartesian Agenda!
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http://geneb.simpits.org - Technical and Simulator Projects
- barry99705
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Re: Hot end questions
Cool. Thanks for the second opinion!
Never do anything you don't want to have to explain to the paramedics.
- lightninjay
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Re: Hot end questions
I had something similar happen, but it turns out my heater cartridge was fine, the Thermistor was failing, and so it kept underreporting temps. This eventually would lead to a Decoupled error being thrown and the hotend shutting off. My stupid mistake would be to turn the printer off, turn it back on, and continue trying to heat the hotend. This cycle would continually heat the cartridge, even though the thermistor was not reporting any temperature change. Ultimately I melted the PEEK section of my hotend and had to swap out for my Prometheus from the stock V2 hotend. Once I discovered it was my thermistor, I replaced it, and I have had stable temps ever since.
If at first you don't succeed, you're doing something wrong. Try again, and if it fails again, try once more. Through trial and error, one can be the first to accomplish something great.