Just finished building a printer of my own design. Nothing unique. The X-Y plane is fixed and Z is up and down. Height is gained by lowing the platform. I am using a Printrbot Rev D board and every time I start a print the platform goes up about 5mm. I would like the first movement to be down 5mm. Using Repetier Host and Slicr and have added G28 to start code. Do not know G code but have tried to change Z movement in the code to negative with no luck. Any ideas? https://reprap.org/forum/read.php?1,543675,543675#msg-543675 Wed, 15 Jul 2026 06:41:01 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,543675,543755#msg-543755 https://reprap.org/forum/read.php?1,543675,543755#msg-543755 #define INVERT_Z_DIR true / false
then reload firmware

or

change stepper wires
invert plug or swap wires to pins 1 and 2]]> george4657 General Sat, 08 Aug 2015 20:12:50 -0400 https://reprap.org/forum/read.php?1,543675,543675#msg-543675 https://reprap.org/forum/read.php?1,543675,543675#msg-543675 The X-Y plane is fixed and Z is up and down. Height is gained by lowing the platform.

I am using a Printrbot Rev D board and every time I start a print the platform goes up about 5mm.
I would like the first movement to be down 5mm.

Using Repetier Host and Slicr and have added G28 to start code.

Do not know G code but have tried to change Z movement in the code to negative with no luck.

Any ideas?]]> ntar827 General Sat, 08 Aug 2015 13:39:23 -0400