Trigger Relay with Extruder Stepper Driver Is there a way that a relay can be triggered only when the stepper driver is moving in a positive direction, ie can I turn on a fan only when the extruder is extruding and turn it off when its retracting? https://reprap.org/forum/read.php?1,629064,629064#msg-629064 Mon, 16 Mar 2026 23:57:14 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,629064,629185#msg-629185 Re: Trigger Relay with Extruder Stepper Driver https://reprap.org/forum/read.php?1,629064,629185#msg-629185 nebbian General Fri, 19 Feb 2016 22:28:23 -0500 https://reprap.org/forum/read.php?1,629064,629076#msg-629076 Re: Trigger Relay with Extruder Stepper Driver https://reprap.org/forum/read.php?1,629064,629076#msg-629076 reprap.org]), but AFAIK the only firmware that supports it is RepRapFirmware.]]> dc42 General Fri, 19 Feb 2016 15:32:20 -0500 https://reprap.org/forum/read.php?1,629064,629064#msg-629064 Trigger Relay with Extruder Stepper Driver https://reprap.org/forum/read.php?1,629064,629064#msg-629064 vulcanrd General Fri, 19 Feb 2016 15:04:16 -0500