Back in 2012, I purchased a SeeMeCNC H-1. This was a kit that was probably the cheapest around at the time at “only” $300.00 or so. The kit was actually driven by some 3-axis CNC electronics that required parallel connection to Mach 3 (or Linux equivalent) along with an additional stepper driver just for driving the extruder at a fixed rate (which is not a great way to do it). Eventually some folks hacked it together with some extra pins on the CNC electronics to trigger an EasyDriver direction/step lines. This worked better, but not perfect.
I got the kit together and it sat for a long time when I started to have issues with the electronics. They just never quited worked right. Eventually I bought a Printrboard Rev D. I tried getting this going but when it wasn’t a drop-in fix, I basically gave up on 3D printing. Sad really, but I’d already poured way more than $300.00 in a printer that couldn’t print. It sat and sat and sat.
Finally, this year, I bought my MP Select Mini. Now that I’ve done some printing, and some disassembly, and some experimenting, I think I understand how things are SUPPOSED to work much better. As such, I started playing with the H-1 again. So far I figured out some of the problems with the Printrboard (the firmware assumed you have end-stops, but I never hooked them up). I also started printing out some mods to the original H1. This page will document the rest of the mods as I go. I’m going to roughly be following the links on this page.
Add-on to convert Triple-bearing block to a PLA linear bearing
Flash the firmware on the Printrboard
Compiling New Printrboard Firmware