Two extruders doesn't heat "together"
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@jay_s_uk said in Two extruders doesn't heat "together":
@the_dragonlord yep, nothing obvious in those
have you see my video https://www.youtube.com/watch?v=2CgUXAy0Zoc ? what do you think about the LEDs blinking?
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@the_dragonlord said in Two extruders doesn't heat "together":
@jay_s_uk said in Two extruders doesn't heat "together":
@the_dragonlord yep, nothing obvious in those
have you see my video https://www.youtube.com/watch?v=2CgUXAy0Zoc ? what do you think about the LEDs blinking?
You have to be a bit careful when looking at the heater LEDs. As a general rule, the bed heater uses a PWM frequency of 10 Hz which is low enough to detect the on/off switching of the Mosfet. But the hot end heaters use a much higher PWM frequency by default, so it's impossible to visually distinguish between say fully on, or switching under PWM control. In RRF 3 you have to set the PWM frequency using the "Q" parameter in M950. If no "Q" value is present, I believe the default is 250 Hz for heaters and fans. If you used the configuration tool, it will likely have set the Q value to 10 Hz for the bed heater and not specified a Q value for the other heaters (so default would be 250 Hz).
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@deckingman said in Two extruders doesn't heat "together":
@the_dragonlord said in Two extruders doesn't heat "together":
@jay_s_uk said in Two extruders doesn't heat "together":
@the_dragonlord yep, nothing obvious in those
have you see my video https://www.youtube.com/watch?v=2CgUXAy0Zoc ? what do you think about the LEDs blinking?
You have to be a bit careful when looking at the heater LEDs. As a general rule, the bed heater uses a PWM frequency of 10 Hz which is low enough to detect the on/off switching of the Mosfet. But the hot end heaters use a much higher PWM frequency by default, so it's impossible to visually distinguish between say fully on, or switching under PWM control. In RRF 3 you have to set the PWM frequency using the "Q" parameter in M950. If no "Q" value is present, I believe the default is 250 Hz for heaters and fans. If you used the configuration tool, it will likely have set the Q value to 10 Hz for the bed heater and not specified a Q value for the other heaters (so default would be 250 Hz).
as you can see in my video the frequency is about 2-3Hz so I think that this is abnormal....when the heating works (with just a tool and the bed active) both the LEDs seems always on so the PWM (blinking) frequency is high enough to "cheat" the eyes
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@the_dragonlord said in Two extruders doesn't heat "together":
as you can see in my video the frequency is about 2-3Hz so I think that this is abnormal....
Not necessarily. But let's try to do things in a methodical and logical way, rather than speculate as to what might, or might not, be wrong. Run those commands I suggested and let us know what happens.
@jay_s_uk made a valid point about the tool change macros. Whilst there doesn't seem to be anything amiss, I would be inclined to comment out the commands in those macros. Then if we can get things working, you can add them back in.
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@deckingman said in Two extruders doesn't heat "together":
@the_dragonlord said in Two extruders doesn't heat "together":
as you can see in my video the frequency is about 2-3Hz so I think that this is abnormal....
Not necessarily. But let's try to do things in a methodical and logical way, rather than speculate as to what might, or might not, be wrong. Run those commands I suggested and let us know what happens.
@jay_s_uk made a valid point about the tool change macros. Whilst there doesn't seem to be anything amiss, I would be inclined to comment out the commands in those macros. Then if we can get things working, you can add them back in.
I will, thanks! I think that later I'll be able to do so when I'll be back home
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@deckingman said in Two extruders doesn't heat "together":
@the_dragonlord said in Two extruders doesn't heat "together":
as you can see in my video the frequency is about 2-3Hz so I think that this is abnormal....
Not necessarily. But let's try to do things in a methodical and logical way, rather than speculate as to what might, or might not, be wrong. Run those commands I suggested and let us know what happens.
@jay_s_uk made a valid point about the tool change macros. Whilst there doesn't seem to be anything amiss, I would be inclined to comment out the commands in those macros. Then if we can get things working, you can add them back in.
I've put back the old cartridges and now it seems all solved....i have no words....
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@the_dragonlord said in Two extruders doesn't heat "together":
i have no words.
How about incredulous?
I'm as confused as you are.
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@phaedrux could this be due to a different PID tune at all I wouldn't expect it but who the hell knows
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@dougal1957 Might be worth measuring the resistance of the old/new cartridges? Maybe the new ones are drawing more current than they are supposed to?
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@gloomyandy said in Two extruders doesn't heat "together":
@dougal1957 Might be worth measuring the resistance of the old/new cartridges? Maybe the new ones are drawing more current than they are supposed to?
not me with the issue just throwing ideas into the pot!
