50 WATT Heater Cartdrige on Volcano hotend Pid-tune problem
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@sniper23 said in 50 WATT Heater Cartdrige on Volcano hotend Pid-tune problem:
Hi, I've got myself a new volcano hotend with 50-watt cartridge. The problem is that when I do write M303 H1 S270 it gets up to 310 degrees.
That's normal when the heater is very powerful for the size of the heater block it is in. Have you measured the resistance of the heater, to calculate the actual power at the VIN voltage you are using?
Basically, it can't give me a stable heating performance.
In what way is the heating performance not stable?
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
not 100% applicable
but here are the values for the original e3d ones
https://matterhackers.dozuki.com/Wiki/E3D_Heater_Cartridge_Resistance -
@dc42 By not stable, I mean this one.
For example, I have set 220 degrees. But, it just doesn't stop there, it goes higher and because of 15c limit, heater faults.
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@sniper23 The reason for that overshoot is the same reason why the predicted fully on temperature would reach nearly 1200 Deg C. Have you measured the resistance yet?
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@sniper23
just checking. how did you have the values from the pidtune? -
@deckingman I don't have tools to check resistance. After some more tweaking, there isn't a huge temperature space between reach and actual temperature.
Well, for now.
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@sniper23 If you can't beg, borrow, steal, or buy a multi-meter, I suggest you buy another heater cartridge from a reliable source that is guaranteed to be for 24V use. Looking at the model gain and the warning about predicted temperature reaching 1175 deg C, I strongly suspect that you have a 50 Watt 12V cartridge, and not a 50 Watt 24 V one.
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@sniper23 said in 50 WATT Heater Cartdrige on Volcano hotend Pid-tune problem:
I don't have tools to check resistance.
you should get one. otherwise you can not diagnose a lot of problems
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@Veti Okay, after a lot of playing with values, it can finally stay in the reached temperature in a stable condition.
M307 H1 A759.9 C180.5 D8.3 S0.50 V23.3 B0
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@sniper23 said in 50 WATT Heater Cartdrige on Volcano hotend Pid-tune problem:
S0.50
this would be a strong indicator that you have a 12V catridge
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@sniper23 If you drive an 50W 12V heater from 24V then it's actually 200W. Since you draw 8.3A from a circuit not designed to handle that (according to this 6.7A max: https://forum.duet3d.com/topic/1925/max-hot-end-heater-current/7) you can blow the mosfet easy. If you do that, or the duet fw freezes for any reason, then you'll probably have a fire on your hands caused by molten aluminum dripping on your printed part and other stuff. So, !!please!! stop using it and find out what you're dealing with before that happens!
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@denke I have fixed the issue, for now.
I use 24V, not 12V. I use a 220W power supply.
