Search found 30 matches

by fjohn624
Wed Sep 02, 2015 6:00 pm
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

Any other news on the board, I'm interested even in the "hole" board, I'm in Italy. Regards Carlo D. If you just want the board as I designed it, then you are free to download the files and place an order with a PCB manufacturer such as OSHpark, purchase the components and assemble it. I don't plan...
by fjohn624
Thu Aug 20, 2015 11:13 pm
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

In thinking about this further, I believe the reason I don't have any noise problems is because my limit switches are wired "Normally Closed". I suspect that if the switches are wired that way and the internal pulls are enabled, there is no reason for optoisolators. Yes using them in NC mode does h...
by fjohn624
Wed Aug 19, 2015 11:22 am
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

I'll quickly clarify a few points from what I have read through. The reason why I originally used opto-isolators was because I had them laying around and I got annoyed trying to tune a RC filter. If you look at the first prototype board, the one that I milled, you can see that it is a very very simp...
by fjohn624
Sat Aug 15, 2015 9:11 pm
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

yea these were actually done from OSHpark. They came out good. I didn't think there would be any that would make them for that reason. Too hard to set up so not any profit in it.

The good news is that this board is very easy to assemble. That was kind of the intention behind its design.
by fjohn624
Sat Aug 15, 2015 8:52 pm
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

I have uploaded a zip file with the board and schematic files, a photo, parts list, and connection diagrams. I have uploaded them to be open source as I don't intend on ever making any money off this, all I ask is: 1. No one else takes this and starts selling them for a profit. Group buys are accept...
by fjohn624
Sat Aug 15, 2015 8:31 pm
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

So this never really went anywhere. I did make an updated version which works with grbl 0.8 and 0.9. I am using the new one and I made one for a friend and lordmundi jumped in to cover his share for one. After hearing how much they liked their boards, I have decided it would be smart to just release...
by fjohn624
Wed Sep 17, 2014 10:58 am
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

It's using the old configuration still. I made it before the new layout was released. If I make more in the future I plan to enable the probe input and yes I can do some jumpers for pin swapping as well.
by fjohn624
Wed Sep 17, 2014 2:21 am
Forum: Discussion
Topic: Automatically turn off Spindle after job
Replies: 5
Views: 1015

Re: Automatically turn off Spindle after job

It's basically just a matter of using the output from the arduino to use as a signal for turning it off and on. For example you could use a solid state relay which can accept that 5v signal and interrupt power to your spindle. I see you are using a quiet cut spindle and I think you could get away wi...
by fjohn624
Wed Sep 17, 2014 2:16 am
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19018

Re: i/o shield for limit switches, user buttons and controls

So slight update... okay a pretty major update I have been working on the board and there is a printed prototype. I won't go into too much detail about it. It is basically the same circuit I made earlier only now there is a coolant enable output as well. An M3 turns the spindle output on, a 5V signa...
by fjohn624
Wed Sep 17, 2014 1:33 am
Forum: Build Logs
Topic: Designed my own drag chain and arduino mounts
Replies: 6
Views: 1901

Re: Designed my own drag chain and arduino mounts

WillAdams wrote:
fjohn624 wrote:I can post those if any one is interested. I can do another thread with completed models for those.
Please!
No problem

http://www.shapeoko.com/forum/viewtopic.php?f=5&t=4228