Hot End Not Turning On When I try to turn on my hot end in pronterface, it says "Setting hotend temperature to 100.000000 degrees Celsius. Setting temperature: no tool selected." Is this most likely due to unconnected wires (poor crimping)? Also, for my temperature readings, I get, for example "T:B: 22.5" But should it be something like "T: 22.5 B: 22.5"? Does this mean my thermistor wiring is not connected right as well? My fan is running though. Thanks for the help. https://reprap.org/forum/read.php?340,383053,383053#msg-383053 Wed, 07 Oct 2026 20:44:35 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?340,383053,383362#msg-383362 Re: Hot End Not Turning On https://reprap.org/forum/read.php?340,383053,383362#msg-383362
Quote
ezwul

I think you have not defined a tool, there are none defined by default and your old config.g will not have the new G-Codes, so you need to add the following in your config.g

M563 P1 D0 H1 ; Define tool 1 to use extruder drive 0 and heater 1 (heater 0 is the hot bed)
G10 P1 S0 R0 ; Set tool 1 operating and standby temperatures

I was not getting temp readings until I did this.
You should probably check all your homeing files as well to make sure they are still compatible.

This did the trick! Thank you so much for the help.]]> itwbaer Ormerod Tue, 15 Jul 2014 12:21:31 -0400 https://reprap.org/forum/read.php?340,383053,383152#msg-383152 Re: Hot End Not Turning On https://reprap.org/forum/read.php?340,383053,383152#msg-383152
Have you just upgraded to the 078 release?

If so you need to read the news feed on the RepRapPro blog ReRapPro Blog point 2.

I think you have not defined a tool, there are none defined by default and your old config.g will not have the new G-Codes, so you need to add the following in your config.g

M563 P1 D0 H1 ; Define tool 1 to use extruder drive 0 and heater 1 (heater 0 is the hot bed)
G10 P1 S0 R0 ; Set tool 1 operating and standby temperatures

I was not getting temp readings until I did this.
You should probably check all your homeing files as well to make sure they are still compatible.]]> ezwul Ormerod Tue, 15 Jul 2014 04:35:51 -0400 https://reprap.org/forum/read.php?340,383053,383096#msg-383096 Re: Hot End Not Turning On https://reprap.org/forum/read.php?340,383053,383096#msg-383096
Your fault is likely because no (extruder) tool is selected. If it works, wiring faults are ruled out.

Putting the "T1" in your config.g should solve the problem.

:-) Carsten]]> colsenfoto Ormerod Tue, 15 Jul 2014 02:15:39 -0400 https://reprap.org/forum/read.php?340,383053,383053#msg-383053 Hot End Not Turning On https://reprap.org/forum/read.php?340,383053,383053#msg-383053
Also, for my temperature readings, I get, for example "T:B: 22.5" But should it be something like "T: 22.5 B: 22.5"? Does this mean my thermistor wiring is not connected right as well? My fan is running though. Thanks for the help.]]> itwbaer Ormerod Mon, 14 Jul 2014 21:38:38 -0400