<![CDATA[SoliForum - 3D Printing Community — Replacement Heat Core - new design]]> https://www.soliforum.com/topic/1009/replacement-heat-core-new-design/ Wed, 10 Apr 2013 23:14:46 +0000 PunBB <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/19372/#p19372 though this doesn't explain why you're having your problem, you could manually change those values. the autotune suggested for you:
P9.34 I0.31 D70.06

By comparison, my values are
34.84, 4.39, 69.08. 

[You can expect I'll have a little bit more overshoot than you, since my Kp value is so high.]

Your values seem reasonable for everything except for I. I is integral control, and responds based on how much error from your target that you have accumulated over time.


I would recommend upping it to 2. That should get into the ballpark where you should be able to get rid of the oscillations, without causing many problems.  You can also try increasing it to 1, seeing if that helps, then 1.5, then 2. But you may as well just jump to 2.

Summary: I was going to suggest you increase the  I term, because I term tends to remove oscillations. This being a maybe reasonable idea is further supported by the fact your I term is set to 10x less than mine.  You can easily edit the EEPROM settings in the repetier software when connected to your printer.

]]> Wed, 10 Apr 2013 23:14:46 +0000 https://www.soliforum.com/post/19372/#p19372 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18793/#p18793 ronsii wrote:

Does the M500 command return with a 'settings saved' acknowledgment?

Yes  and I just rebooted and the setting appeared to be saved.  in RH the eeprom setting appear to have the correct numbers as well.

everything now looks good, except the sinewave looking heat fluctuation.

like this https://lh6.googleusercontent.com/-TJJ4RiW6jhA/UWBqEy6ICtI/AAAAAAAAG9I/YKRIO-qIojo/s697/photo.JPG

]]> Sat, 06 Apr 2013 18:36:53 +0000 https://www.soliforum.com/post/18793/#p18793 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18790/#p18790 lobosolo wrote:
ronsii wrote:

Hi Gary and Lobo, Can you post the last PID numbers you programmed the SD with?

sure thing.
i run this in RH after i set the temp to 190

M303 S190 C5

let it cycle until it gives me the PID output which is this


M301 P9.34 I0.31 D70.06

everything looks good so i run

M500

close, unplug restart and i get this
the PID settings are not staying saved.


09:07:41.885 : echo: Free Memory: 1453  PlannerBufferBytes: 1232
09:07:41.885 : echo:Using Default settings:
09:07:41.885 : echo:Steps per unit:
09:07:41.885 : echo:  M92 X88.00 Y88.00 Z2268.00 E138.00
09:07:41.885 : echo:Maximum feedrates (mm/s):
09:07:41.885 : echo:  M203 X500.00 Y500.00 Z5.00 E45.00
09:07:41.885 : echo:Maximum Acceleration (mm/s2):
09:07:41.885 : echo:  M201 X9000 Y9000 Z100 E10000
09:07:41.885 : echo:Acceleration: S=acceleration, T=retract acceleration
09:07:41.885 : echo:  M204 S3000.00 T3000.00
09:07:41.885 : echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum xY jerk (mm/s),  Z=maximum Z jerk (mm/s)
09:07:41.885 : echo:  M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
09:07:41.885 : echo:Home offset (mm):
09:07:41.885 : echo:  M206 X0.00 Y0.00 Z0.00
09:07:41.885 : echo:PID settings:
09:07:41.885 : echo:   M301 P22.20 I1.08 D114.00
09:07:41.920 : N6 M105 *1
09:07:42.125 : ok
09:07:42.150 : FIRMWARE_NAME:Marlin V1; Sprinter/grbl mashup for gen6 FIRMWARE_URL:https://github.com/mlaws/solidoodle2-marlin PROTOCOL_VERSION:1.0 MACHINE_TYPE:Solidoodle EXTRUDER_COUNT:1
09:07:42.150 : ok
09:07:42.150 : N7 M220 S100 *70
09:07:42.150 : N8 M111 S6 *79
09:07:42.155 : ok T:68.7 /3.0 B:46.7 /3.0 @:0

Does the M500 command return with a 'settings saved' acknowledgment?

]]> Sat, 06 Apr 2013 17:23:02 +0000 https://www.soliforum.com/post/18790/#p18790 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18780/#p18780 ronsii wrote:

Hi Gary and Lobo, Can you post the last PID numbers you programmed the SD with?

sure thing.
i run this in RH after i set the temp to 190

M303 S190 C5

let it cycle until it gives me the PID output which is this


M301 P9.34 I0.31 D70.06

everything looks good so i run

M500

close, unplug restart and i get this
the PID settings are not staying saved.


09:07:41.885 : echo: Free Memory: 1453  PlannerBufferBytes: 1232
09:07:41.885 : echo:Using Default settings:
09:07:41.885 : echo:Steps per unit:
09:07:41.885 : echo:  M92 X88.00 Y88.00 Z2268.00 E138.00
09:07:41.885 : echo:Maximum feedrates (mm/s):
09:07:41.885 : echo:  M203 X500.00 Y500.00 Z5.00 E45.00
09:07:41.885 : echo:Maximum Acceleration (mm/s2):
09:07:41.885 : echo:  M201 X9000 Y9000 Z100 E10000
09:07:41.885 : echo:Acceleration: S=acceleration, T=retract acceleration
09:07:41.885 : echo:  M204 S3000.00 T3000.00
09:07:41.885 : echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum xY jerk (mm/s),  Z=maximum Z jerk (mm/s)
09:07:41.885 : echo:  M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
09:07:41.885 : echo:Home offset (mm):
09:07:41.885 : echo:  M206 X0.00 Y0.00 Z0.00
09:07:41.885 : echo:PID settings:
09:07:41.885 : echo:   M301 P22.20 I1.08 D114.00
09:07:41.920 : N6 M105 *1
09:07:42.125 : ok
09:07:42.150 : FIRMWARE_NAME:Marlin V1; Sprinter/grbl mashup for gen6 FIRMWARE_URL:https://github.com/mlaws/solidoodle2-marlin PROTOCOL_VERSION:1.0 MACHINE_TYPE:Solidoodle EXTRUDER_COUNT:1
09:07:42.150 : ok
09:07:42.150 : N7 M220 S100 *70
09:07:42.150 : N8 M111 S6 *79
09:07:42.155 : ok T:68.7 /3.0 B:46.7 /3.0 @:0

]]> Sat, 06 Apr 2013 14:14:21 +0000 https://www.soliforum.com/post/18780/#p18780 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18464/#p18464 Hi Gary and Lobo, Can you post the last PID numbers you programmed the SD with?

]]> Wed, 03 Apr 2013 17:22:26 +0000 https://www.soliforum.com/post/18464/#p18464 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18450/#p18450 You've got to wait for an elmoret or lawsy response or someone else that can debug electronics.  That's my weak point.

]]> Wed, 03 Apr 2013 15:39:21 +0000 https://www.soliforum.com/post/18450/#p18450 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18448/#p18448 I am still having the temp swings as well. I contacted solidoodle support who told me that it if its not affecting the prints, then it should be fine. mine has 20 degree temp swings up and down 10 degrees. when i look at the temperature tab (set to 190) it looks like a sinewave just up and down 180 to 200.  yes i have the Thermistor securely attached.

]]> Wed, 03 Apr 2013 15:32:06 +0000 https://www.soliforum.com/post/18448/#p18448 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18445/#p18445 thermistor secure?

]]> Wed, 03 Apr 2013 15:21:48 +0000 https://www.soliforum.com/post/18445/#p18445 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/18440/#p18440 I am having similar problems with temperature stability. Extrude temps consistently overshoot both heating and cooling by 15 degrees or more. Trying to print PLA at 185C as soon as the skirt start to print the nozzle temp drops below 170, and the extrusion cuts off (but repitier DOESN'T pause or abort the print!). If I jack it up to 190-195, it doesn't cools below 170 and stop extruding, but the PLA softens enough at the cold end to bend and wrap around the drive wheel, and jam the whole works.

I have done the PID recalcs - multiple times at 185, and the numbers come back consistent. The damn thing just can't hold within a 15 degree range.

Suggestions?

]]> Wed, 03 Apr 2013 14:59:27 +0000 https://www.soliforum.com/post/18440/#p18440 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/10802/#p10802 cmetzel wrote:
jefferysanders wrote:

"The PID auto tune helped enormously after I switched hot ends."

I M303 S200 C(x) anytime I change anything with hardware or software.  It can't hurt; just set X for a reasonable amount of cycles so you get a good number w/o cooking the filament and clogging.


Yeah I missed that tip and got my first clog while "autotuning".  Plus now my voice sounds like kanye west.

HAH!

You think the new heat core design is necessary now that we've switched to heater blocks?

]]> Sun, 27 Jan 2013 15:46:04 +0000 https://www.soliforum.com/post/10802/#p10802 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/10742/#p10742 I used to have a hard time with really long prints myself, after I added small ram heat-sinks (to the stepper drivers) and a 60mm fan and everything seems much better...and now you said that and since I have extras I will stick a couple on the Mosfets (couldn't hurt).  I use a full case for my sang and 60 to 40 Fan adapter keeping positive pressure which helps with dust.  I normally do 7-15 hour prints w/o problem now.  My printer is in use nearly 24-hours a day...so much that demand for redundancy has me adding a couple Prusa i3 printers the first-to-mid next month.  I have almost all the parts in and will begin construction next week!!!

]]> Sun, 27 Jan 2013 02:03:22 +0000 https://www.soliforum.com/post/10742/#p10742 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/10655/#p10655 Interesting issue with the new hot end and temperature control.  My extruder has been stable within 1-2 degrees most of the time.  However, since I've been running 4-5 hour prints there seems to be a longer cycle where the hot end will stay stable for five minutes and then fluctuate more wildly for 5 minutes a ways into the print.  When it fluctuates wildly, it swings back and forth about 10-11 degrees.  I understand thoroughly how PID controls work and I did run the autotune, but I don't understand what the additional input would be that would cause the change in stability. My case is completely enclosed and I am not running the fan.  Is it possible the MOSFET needs additional help cooling? There is already a fan on the electronics, so I guess the only thing I could do is add another fan or a bigger heat sink.  Any other ideas?

]]> Sat, 26 Jan 2013 06:52:36 +0000 https://www.soliforum.com/post/10655/#p10655 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/10407/#p10407 jefferysanders wrote:

"The PID auto tune helped enormously after I switched hot ends."

I M303 S200 C(x) anytime I change anything with hardware or software.  It can't hurt; just set X for a reasonable amount of cycles so you get a good number w/o cooking the filament and clogging.


Yeah I missed that tip and got my first clog while "autotuning".  Plus now my voice sounds like kanye west.

]]> Wed, 23 Jan 2013 22:17:52 +0000 https://www.soliforum.com/post/10407/#p10407 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/10388/#p10388 "The PID auto tune helped enormously after I switched hot ends."

I M303 S200 C(x) anytime I change anything with hardware or software.  It can't hurt; just set X for a reasonable amount of cycles so you get a good number w/o cooking the filament and clogging.

]]> Wed, 23 Jan 2013 20:42:03 +0000 https://www.soliforum.com/post/10388/#p10388 <![CDATA[Re: Replacement Heat Core - new design]]> https://www.soliforum.com/post/10380/#p10380 cmetzel wrote:

I still print from pronterface and it seems to have helped, although from time to time I notice that my set temp changes from 195 to 200 by itself, don't know what that is about.

Settings of your slicing package.

]]> Wed, 23 Jan 2013 20:00:54 +0000 https://www.soliforum.com/post/10380/#p10380