I've built my machine, electronics and have assembled the whole things. I'm testing each axis individually but have a problem. I often run into the issue that I can run the driver to say 50mm and the axis will push out to that point. But when I try to pull it back to say 10 mm, the lights on the board flash for a single moment, then stop. Pressing ht home button does the same thing. So I can only push it out to a certain point, but not back. Any ideas. I've tried unplugging my opto-switches and new switches to no avail;. Have I forgotten something? https://reprap.org/forum/read.php?4,21394,21394#msg-21394 Thu, 18 Jun 2026 10:49:02 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,21394,21418#msg-21418 https://reprap.org/forum/read.php?4,21394,21418#msg-21418
The current position is not stored permanently so as soon as you switch the machine off it needs to recalibrate itself using the homing switches.
(just like your inkjet does)

'sid]]> sid Reprappers Fri, 13 Feb 2009 08:59:19 -0500 https://reprap.org/forum/read.php?4,21394,21405#msg-21405 https://reprap.org/forum/read.php?4,21394,21405#msg-21405
I did test each opto a few months ago to see if they worked using the test program, I had few problems. I think I'll have to check them again tonight.]]> letsburn00 Reprappers Thu, 12 Feb 2009 18:26:41 -0500 https://reprap.org/forum/read.php?4,21394,21401#msg-21401 https://reprap.org/forum/read.php?4,21394,21401#msg-21401
I'm not sure if the connections are the same on the arduino electronics.]]> greenarrow Reprappers Thu, 12 Feb 2009 17:21:55 -0500 https://reprap.org/forum/read.php?4,21394,21395#msg-21395 https://reprap.org/forum/read.php?4,21394,21395#msg-21395 nophead Reprappers Thu, 12 Feb 2009 08:37:49 -0500 https://reprap.org/forum/read.php?4,21394,21394#msg-21394 https://reprap.org/forum/read.php?4,21394,21394#msg-21394 letsburn00 Reprappers Thu, 12 Feb 2009 08:15:20 -0500