servo movement So, after much fighting, I've got my z - probe moving, the problem is that when it give the command for up (M401) the probe goes down and vice versa. Similar story happens when I enter G28 and G29, when it goes to probe the z axis it lifts the probe instead of lowering it. Is there a place in the firmware to invert the direction? If not, what other options do I have? https://reprap.org/forum/read.php?344,389435,389435#msg-389435 Mon, 10 Aug 2026 19:42:04 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?344,389435,389713#msg-389713 Re: servo movement https://reprap.org/forum/read.php?344,389435,389713#msg-389713
For example with my servo M280 P0 S10 moved the arm to the correct position for retraction, and M280 P0 S88 was correct for extension.

Then you need to edit this line in the Marlin Configuration.h file.

//smartrap : version pololu servo (dark blue)

#define SERVO_ENDSTOP_ANGLES {0,0, 0,0, 88,10) // X,Y,Z Axis Extend and Retract angles

Hope that helps]]> madmike8 Smart_Rap Thu, 31 Jul 2014 13:19:10 -0400 https://reprap.org/forum/read.php?344,389435,389444#msg-389444 Re: servo movement https://reprap.org/forum/read.php?344,389435,389444#msg-389444
[www.pololu.com] Thats the exact one that I have

What values are you using for your servo locations? I think I have found that parameter in the firmware, maybe if I put in different values that would fix the problem?]]> mashedtaters Smart_Rap Wed, 30 Jul 2014 19:28:32 -0400 https://reprap.org/forum/read.php?344,389435,389440#msg-389440 Re: servo movement https://reprap.org/forum/read.php?344,389435,389440#msg-389440 duranza Smart_Rap Wed, 30 Jul 2014 19:19:04 -0400 https://reprap.org/forum/read.php?344,389435,389437#msg-389437 Re: servo movement https://reprap.org/forum/read.php?344,389435,389437#msg-389437 mashedtaters Smart_Rap Wed, 30 Jul 2014 19:04:13 -0400 https://reprap.org/forum/read.php?344,389435,389436#msg-389436 Re: servo movement https://reprap.org/forum/read.php?344,389435,389436#msg-389436 duranza Smart_Rap Wed, 30 Jul 2014 18:59:13 -0400 https://reprap.org/forum/read.php?344,389435,389435#msg-389435 servo movement https://reprap.org/forum/read.php?344,389435,389435#msg-389435
Is there a place in the firmware to invert the direction? If not, what other options do I have?]]> mashedtaters Smart_Rap Wed, 30 Jul 2014 18:56:24 -0400