good afternoon YouTube so this is the control screen for my Taipei machine series 1 Pro 3d
printer and recently I installed a point 6 millimeter extruder on the printer and one
of the things I've noticed since doing that is the extruder temperature here or print head as
they label it is rather unstable it swings from here to 45 on the high end fact almost 250 and
I have it set for 2:30 so there we've hit 250 and I think it's gone down into the 220 you can
see it's quite unstable there we go we're going down again to 38 so we overshot by 20 degrees
and I think yeah there we go to 25 to 20 to 18 so yeah the temperature is gone from 218 up to
250 degrees and I have it set at 2:30 so one thing I want to do here I'm going to suppress these em
105 so I'm in the terminal window and what I want to do is run an EM 3:01 command so this reads out
the current settings for what's called the PID or proportional integral derivative control on
the temperature for the printhead so my current numbers are these copy this I've got a text file
over here I just want to save these numbers so now what I want to do is I want to have the printer
run what's called the auto-tune function so what it's going to do is test various parameters for
the three variables so there's the KP the ki and the KD so the way you do that here is I run an
M 303 and then I want to use 230 degrees C as my temperature and in fact let's see yeah he was he
wouldn't even run because that was too high so let me let me try that again I guess what I need to do
I guess I have to set this off I guess we need to let it cool off a little bit hero3 230 there we
go now it's working so it's doing this Auto Tune process and let's take a look at the temperature
here that's weird it's down here I just want to see maybe I typed in the wrong number so I did
s 230 yeah it looks like it's using a much lower temperature here as it's trying to use 168 maybe
the lowercase s cause it a problem I guess I'll have to wait till it finishes and then I'll try
it again with an uppercase s okay it looked like it's finished here for some reason it didn't like
the lowercase s I guess but I got pretty similar results to last time when I ran it to 50 I got
numbers of six point three point two two and forty four forty seven quite close but let me try this
again so I'm going to do M 303 and then s 230 all uppercase so let's see what that does here and we
can take a look at the temperature okay yeah now it's going up to 230 should be dropping off pretty
soon here we hit 250 again for the high and then it starts to drop let's take a look at the output
here so yeah I guess you must use uppercase so be sure to hit the caps lock before you send any G
code commands funny it doesn't report it as an error but it just gets the wrong data from the
out so you can see here it's made one adjustment and now it's going from 220 to 240 so we'll come
back and see what the third adjustment does okay now it looks like it finished here so the final
came out to 220 and a half up to 240 and then my numbers here again are pretty close to what
I had but what I want to do now is write these numbers to memory so I use the M 301 command
and then you set the P term P to 6.59 the i2 0.24 and the D 45 point 91 so it should be
these numbers six point five nine zero point two four and forty five point ninety one so we'll do
a send and let's just check we'll do a three zero one to verify okay and then to actually
write them to the non-volatile memory you do an m5 hundred so we'll do em five hundred settings
are stored yeah I just want to save these over in my text file so I know what I did and let's
go back over here and we're going to set it to 230 and let's just see what it looks like here
hey now we're back at 2:30 so we hit to 35:37 and then it drops back down
so much better to 36 to 32 to 26 to 22 if we did go to 18 to 16 so
it's going a little lower than they said in the test there it looks like
okay now it looks like it's smoothing out there so there we hit 232 looks like yeah
now it that's a lot better that's what it used to do with the original extruder that
came on the machine so it must have been calibrated to the heater that
was in that original extruder yeah look at that we're just rock-solid
so that's how you can fix a wobbling or unstable extruder printhead temperature