I am having an issue with the hotend not heating up quickly enough. I start the Printer and then set the hotend temperature to 200 C. It starts to heat up but after some time I get a message saying "Heating fault on heater 1, T = 196.8 C; still not at temperature 200.0 after 150.484131 seconds." I can get past this by resetting the hotend while it is still hot and setting the temp again but this doesn't fix the issue. During printing, it is also dropping the temperature by 10 to 20 C when it starts to print quickly. But the prints seem to come out fine despite this. I think this is caused by the hotend heating up slowly and not being able to keep up with the amount of material that it is extruding. I have had this printer for a while and it has only started doing this recently. Could it be a firmware issue? Is there anyway to change the hotend temperature check so it can heat up quicker? FYI, I have just changed the hotend and the whole heatsink assembly because the same was happening to the old one so I don't think that was the issue. Also, I am not sure when I updated the Firmware last or if this started after a firmware change. https://reprap.org/forum/read.php?340,875644,875644#msg-875644 Tue, 21 Jul 2026 16:28:23 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?340,875644,894467#msg-894467 https://reprap.org/forum/read.php?340,875644,894467#msg-894467
1) power supply
2) not having done the PID tuning

Doing/fixing either of those solved my problems.]]> Sardi Ormerod Mon, 04 Mar 2024 07:35:45 -0500 https://reprap.org/forum/read.php?340,875644,894463#msg-894463 https://reprap.org/forum/read.php?340,875644,894463#msg-894463 dongdong5212a Ormerod Sun, 03 Mar 2024 03:00:19 -0500 https://reprap.org/forum/read.php?340,875644,894462#msg-894462 https://reprap.org/forum/read.php?340,875644,894462#msg-894462 forum.duet3d.com].]]> dc42 Ormerod Sun, 03 Mar 2024 01:55:09 -0500 https://reprap.org/forum/read.php?340,875644,894449#msg-894449 https://reprap.org/forum/read.php?340,875644,894449#msg-894449
With the heater turned on I measured approx 4.3V gate to ground where the +5V rail measured 5V. The voltage should have been around 4.95V.

I also noticed that TR4 heated up but not enough to burn the PCB.

With the damaged gate I was surprised that that the MOSFET switched at all let alone partially.

The printer was still under guarantee and RS Components insisted on changing the printer so when I built the new printer I confirmed that T4 gate voltage was almost 5V.

Hope that helps."

Now the E3D tool changer is based on duet2, I think maybe changing duet3 will solve the problem. at first, I wan to change the hot end, or the temperature sensor. but I see the discussion above, the problem still exists.]]> dongdong5212a Ormerod Thu, 29 Feb 2024 08:05:58 -0500 https://reprap.org/forum/read.php?340,875644,894448#msg-894448 https://reprap.org/forum/read.php?340,875644,894448#msg-894448 dc42 Ormerod Thu, 29 Feb 2024 01:50:33 -0500 https://reprap.org/forum/read.php?340,875644,894443#msg-894443 https://reprap.org/forum/read.php?340,875644,894443#msg-894443 dongdong5212a Ormerod Mon, 26 Feb 2024 19:56:18 -0500 https://reprap.org/forum/read.php?340,875644,875937#msg-875937 https://reprap.org/forum/read.php?340,875644,875937#msg-875937 b-irwin Ormerod Sat, 08 Aug 2020 14:39:10 -0400 https://reprap.org/forum/read.php?340,875644,875923#msg-875923 https://reprap.org/forum/read.php?340,875644,875923#msg-875923
With the heater turned on I measured approx 4.3V gate to ground where the +5V rail measured 5V. The voltage should have been around 4.95V.

I also noticed that TR4 heated up but not enough to burn the PCB.

With the damaged gate I was surprised that that the MOSFET switched at all let alone partially.

The printer was still under guarantee and RS Components insisted on changing the printer so when I built the new printer I confirmed that T4 gate voltage was almost 5V.

Hope that helps.]]> Dennisvlo Ormerod Sat, 08 Aug 2020 04:16:45 -0400 https://reprap.org/forum/read.php?340,875644,875661#msg-875661 https://reprap.org/forum/read.php?340,875644,875661#msg-875661
I haven't done any tuning to the heater as far as I can tell. I can't remember doing any tuning when I built the machine so I didn't realise I needed to.

I replaced most of the wiring loom and checked it so I am pretty sure the wire is still good.

I haven't checked the thermistor B parameter but I am not sure what it is supposed to be. The printer still works so I assumed this was correct.]]> b-irwin Ormerod Thu, 30 Jul 2020 08:59:42 -0400 https://reprap.org/forum/read.php?340,875644,875657#msg-875657 https://reprap.org/forum/read.php?340,875644,875657#msg-875657 duet3d.dozuki.com]

Check that the heater wiring is in good condition with no signs of overheating at the connectors.

Check that you have set the correct thermistor B parameter in the M305 command for the heater.]]> dc42 Ormerod Thu, 30 Jul 2020 06:28:43 -0400 https://reprap.org/forum/read.php?340,875644,875644#msg-875644 https://reprap.org/forum/read.php?340,875644,875644#msg-875644
I start the Printer and then set the hotend temperature to 200 C. It starts to heat up but after some time I get a message saying "Heating fault on heater 1, T = 196.8 C; still not at temperature 200.0 after 150.484131 seconds." I can get past this by resetting the hotend while it is still hot and setting the temp again but this doesn't fix the issue.

During printing, it is also dropping the temperature by 10 to 20 C when it starts to print quickly. But the prints seem to come out fine despite this.

I think this is caused by the hotend heating up slowly and not being able to keep up with the amount of material that it is extruding.

I have had this printer for a while and it has only started doing this recently. Could it be a firmware issue? Is there anyway to change the hotend temperature check so it can heat up quicker?

FYI, I have just changed the hotend and the whole heatsink assembly because the same was happening to the old one so I don't think that was the issue. Also, I am not sure when I updated the Firmware last or if this started after a firmware change.]]> b-irwin Ormerod Wed, 29 Jul 2020 17:11:00 -0400