Start of the nozzle heating is not stable When I start my print the heating of the nozzle is erattic in the beginning. wiebeltemp.png mod_embed_images_loadimage('c31e6449d45ce3436d1120c30b13a6ce', '/forum/thumbcache/307/6ee/dd9/e64/4ab/6b0/708/a56/364/273/e7_800x400.png', 'https://i.postimg.cc/0QnxcWDr/wiebeltemp.png', 'https://reprap.org/forum/addon.php?1,module=embed_images,check_scaling=1,url=https%3A%2F%2Fi.postimg.cc%2F0QnxcWDr%2Fwiebeltemp.png', '', 878593, 800, 400, 'Loading image ...', false); During the total length of the print the temperature is stable. Firmware is Marlin 2.0.5.4 Mainboard is SKRv1.3 Hotend is E3Dv6 And I'm heating the hotend to 140 degC and Bed to 50degC simultaneous. When the bed reaches 50 deg the second stage heating to the desired hotend temp is commenced. What can be the cause of this phenomenon. best regards Piet. https://reprap.org/forum/read.php?1,878593,878593#msg-878593 Sat, 06 Jun 2026 03:56:07 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,878593,878602#msg-878602 Re: Start of the nozzle heating is not stable https://reprap.org/forum/read.php?1,878593,878602#msg-878602
Quote
Ohmarinus
Looks to me like the nozzle temp is related to the bed temp. It waits for the bed to reach full temp before it continues heating the nozzle. This is probably to reduce stationary plastic getting heated for too long in the nozzle, preventing clogs.

Yes that is intentional, as I wrote.
But the reason "to reduce stationary plastic" is a bit obsolete because of the PID algoritme, I guess.

But my question was about the fading sinusoidal curve of both bed and nozzle reaching the target temperature.]]> Bossie General Fri, 06 Nov 2020 11:30:43 -0500 https://reprap.org/forum/read.php?1,878593,878599#msg-878599 Re: Start of the nozzle heating is not stable https://reprap.org/forum/read.php?1,878593,878599#msg-878599 Ohmarinus General Fri, 06 Nov 2020 10:53:21 -0500 https://reprap.org/forum/read.php?1,878593,878595#msg-878595 Re: Start of the nozzle heating is not stable https://reprap.org/forum/read.php?1,878593,878595#msg-878595 VDX General Fri, 06 Nov 2020 07:48:13 -0500 https://reprap.org/forum/read.php?1,878593,878594#msg-878594 Re: Start of the nozzle heating is not stable https://reprap.org/forum/read.php?1,878593,878594#msg-878594 VDX General Fri, 06 Nov 2020 07:46:30 -0500 https://reprap.org/forum/read.php?1,878593,878593#msg-878593 Start of the nozzle heating is not stable https://reprap.org/forum/read.php?1,878593,878593#msg-878593
During the total length of the print the temperature is stable.
Firmware is Marlin 2.0.5.4
Mainboard is SKRv1.3
Hotend is E3Dv6
And I'm heating the hotend to 140 degC and Bed to 50degC simultaneous.
When the bed reaches 50 deg the second stage heating to the desired hotend temp is commenced.
What can be the cause of this phenomenon.

best regards Piet.
]]> Bossie General Fri, 06 Nov 2020 07:30:31 -0500