<![CDATA[SoliForum - 3D Printing Community — What is the white cement on heat core?]]> https://www.soliforum.com/topic/10461/what-is-the-white-cement-on-heat-core/ Thu, 19 Mar 2015 12:11:00 +0000 PunBB <![CDATA[Re: What is the white cement on heat core?]]> https://www.soliforum.com/post/90132/#p90132 I have tried to run the PID autotune with a cold extruder and it would time out every time (on an SD4).

Pre-heat the extruder to your desired temp, then turn it off and run the M command immediately after...

M301 Sxxx C8 - where xxx = your desired temp. the C8 tells it to run 8 times - i think the default run is 3 times?

This method has worked great for me and I get pretty good results with the changes made.

]]> Thu, 19 Mar 2015 12:11:00 +0000 https://www.soliforum.com/post/90132/#p90132 <![CDATA[Re: What is the white cement on heat core?]]> https://www.soliforum.com/post/90075/#p90075 labguy wrote:

JB Weld...brilliant! Thanks for the pro-tip! I certainly will get an EV3. I even printed out the parts to receive a EV3v6 just last week.

I've never done a PID autotune, but will give it a go since the current hotend is actually slightly upgrade from the original. I was looking at these PID tuning instructions:

http://wiki.solidoodle.com/pid-autotune … luctuation

It's interesting that they run it with the hot end cold. I would think that you'd want to bring it up to the desired temperature (195 C in my case) and run it.



Jeff

I believe the temperature ramp time is also figured into the PID calibration as well. That is why they start cold.

]]> Wed, 18 Mar 2015 22:40:23 +0000 https://www.soliforum.com/post/90075/#p90075 <![CDATA[Re: What is the white cement on heat core?]]> https://www.soliforum.com/post/90058/#p90058 The PID autotune cycles as many times as you request, so the actual tuning happens at temperature. I use 8 cycles. The more cycles, the better your PID calibration will be up to a limit

]]> Wed, 18 Mar 2015 20:13:18 +0000 https://www.soliforum.com/post/90058/#p90058 <![CDATA[Re: What is the white cement on heat core?]]> https://www.soliforum.com/post/90054/#p90054 JB Weld...brilliant! Thanks for the pro-tip! I certainly will get an EV3. I even printed out the parts to receive a EV3v6 just last week.

I've never done a PID autotune, but will give it a go since the current hotend is actually slightly upgrade from the original. I was looking at these PID tuning instructions:

http://wiki.solidoodle.com/pid-autotune … luctuation

It's interesting that they run it with the hot end cold. I would think that you'd want to bring it up to the desired temperature (195 C in my case) and run it.



Jeff

]]> Wed, 18 Mar 2015 20:04:24 +0000 https://www.soliforum.com/post/90054/#p90054 <![CDATA[Re: What is the white cement on heat core?]]> https://www.soliforum.com/post/90039/#p90039 I think it's cement but if everything is properly strain relieved I don't believe you need it anyway. Maybe run a pid autotune just in case it affects temperature a bit.

]]> Wed, 18 Mar 2015 17:27:11 +0000 https://www.soliforum.com/post/90039/#p90039 <![CDATA[Re: What is the white cement on heat core?]]> https://www.soliforum.com/post/90036/#p90036 Can't tell you exactly what it is, but I did the same, and repaired it quite well with plain-ole-JB Weld.  Worked great till I replaced the hot end with an E3D.  A lot cheaper than some thermal compound.  Give it a try..

Ski

]]> Wed, 18 Mar 2015 17:24:36 +0000 https://www.soliforum.com/post/90036/#p90036 <![CDATA[What is the white cement on heat core?]]> https://www.soliforum.com/post/90033/#p90033 Hi Everyone,

I was clearing a clog on my SD2 hotend and broke away the white cement paste stuff from the core. Can anyone tell me what exactly that stuff is so I can pick some up (image attached)? In fact, is it critical to the assembly?

Thanks for the advice.

Jeff

]]> Wed, 18 Mar 2015 17:02:15 +0000 https://www.soliforum.com/post/90033/#p90033