Arduino wire cutter stripper with nextion display
I'm not a professional. I've worked on my own personal 3d printers for awhile so I'm familiar with arduino and steppers. Never have I done a project like this so its my first from start to finish. I basically saw Mr Innovatives video and wanted a machine similar, but no code or layout was provided. I've made some very simple 3d drawings for the supports and during my trial and error build I decided limit switches where the way I wanted to go. This way I dont care about steps when it comes to cutting the wire (other than feeding wire). My first nextion HMI - lots of hardships getting through it and the arduino code, again I'm no pro by far. I'm sure there are alot of things that are questionable and/or not correctly done, but I went with what I could figure out. Please feel free to contribute to the code, if you want to collabrate on this let me know and I'll open the door. I can be contacted through garzajd3@gmail.com or message on github.
In the pics below is my version of this tool. I went with adding limit switches on the "cutter" stepper so that I do not need to actually know the # of steps for a close/open.
There are a total of 5 3d printed parts: 1 for the feed stepper mount, 1 for the wire tube holder (adjustable to align with cutter), 1 cutter holder, 1 piece the holds both limits switches (mounted to the cutter stepper).
I've also opted to use a 5:1 stepper for the cutting unit. I was finding that with a standard 1:1 nema 17 sometimes steps would be skipped when trying to cut wire. I'm sure this can be worked out by adjusting linkage, position, etc but I wanted something that would work consistently with alittle more power.
Sorry this pic is blurry, but it was the only one I took. This is the simple PCB I laid out as a UNO plug-in (shield) for the stepper drivers and connectors. I probably went overkill on the components, but oh well. I do seem to have an issue that I'm trying to pinpoint. When the display is plugged in, the cutter stepper jitters around for a few seconds before acting normal. Without the display plugged in no issue. I've bosted power thinking that the display pull was to much, it seems to help but has not eliminated the issue. My current guess is that the display "boot" is sending data that is causing the uno to do funny things - until the screen "boot" is done. Will keep looking at this until I resolve it.
