Delta hot end keeps melting plastic body Im building a Delta Rostock, my j head gets so hot it melts the PEEK housing, its the second time its happened, I have noticed even when I set the temp in ponteprint to 200 it heats up to 230 then backs off to 200, I suspect the thermistor may have something to do with it, any advice on this problem and how to solve it, what settings should be? https://reprap.org/forum/read.php?178,302637,302637#msg-302637 Fri, 12 Jun 2026 16:53:56 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?178,302637,306706#msg-306706 Re: Delta hot end keeps melting plastic body https://reprap.org/forum/read.php?178,302637,306706#msg-306706
One other question I have- is there a Delta rostock bed settings on slicer do you know I cannot seem to find one, but I hear a rumour? I am have trouble telling slicer 0,0 is at the centre of my bed, and so it tries to print off the bed?]]> rm2014 Delta Machines Wed, 05 Feb 2014 13:24:29 -0500 https://reprap.org/forum/read.php?178,302637,304300#msg-304300 Re: Delta hot end keeps melting plastic body https://reprap.org/forum/read.php?178,302637,304300#msg-304300
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rm2014
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gmh39
Yea that definitely sounds like a PID issue. It sounds like you are WAY overshooting your target temperature.

I am still have a problem, when M303 C8 S100 it on pronter face it returns- Bed auto tune fail, temperature too high. Any thoughts advice on this?

In the code it is set that if it goes 40 degrees higher than whatever you told it to go to it will abort.
In the marlin firmware folder look in the file temperature.cpp line 284 it has this:

if(input > (temp + 40)) {
SERIAL_PROTOCOLLNPGM("PID Autotune failed! Temperature too high");
return;

Change the 40 to something higher to stop it failing. 80 would be an ok figure if you told it to only go to 100 degrees. Obviously you don't want to overheat it.]]> TheTechnicalNoob Delta Machines Sat, 01 Feb 2014 05:42:28 -0500 https://reprap.org/forum/read.php?178,302637,303902#msg-303902 Re: Delta hot end keeps melting plastic body https://reprap.org/forum/read.php?178,302637,303902#msg-303902
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gmh39
Yea that definitely sounds like a PID issue. It sounds like you are WAY overshooting your target temperature.

I am still have a problem, when M303 C8 S100 it on pronter face it returns- Bed auto tune fail, temperature too high. Any thoughts advice on this?]]> rm2014 Delta Machines Fri, 31 Jan 2014 09:51:19 -0500 https://reprap.org/forum/read.php?178,302637,303099#msg-303099 Re: Delta hot end keeps melting plastic body https://reprap.org/forum/read.php?178,302637,303099#msg-303099 rm2014 Delta Machines Wed, 29 Jan 2014 18:31:24 -0500 https://reprap.org/forum/read.php?178,302637,302848#msg-302848 Re: Delta hot end keeps melting plastic body https://reprap.org/forum/read.php?178,302637,302848#msg-302848 gmh39 Delta Machines Wed, 29 Jan 2014 08:39:49 -0500 https://reprap.org/forum/read.php?178,302637,302677#msg-302677 Re: Delta hot end keeps melting plastic body https://reprap.org/forum/read.php?178,302637,302677#msg-302677 caffeinatedsoap Delta Machines Tue, 28 Jan 2014 21:12:18 -0500 https://reprap.org/forum/read.php?178,302637,302637#msg-302637 Delta hot end keeps melting plastic body https://reprap.org/forum/read.php?178,302637,302637#msg-302637 rm2014 Delta Machines Tue, 28 Jan 2014 18:25:52 -0500