Search found 430 matches

by PsyKo
Fri Jan 01, 2016 10:21 am
Forum: Electronics
Topic: Advice needed : PCB for home switch
Replies: 11
Views: 2166

Re: Advice needed : PCB for home switch

Bump on this topic. I did some test (using cvoinescu's diagram http://www.shapeoko.com/forum/download/file.php?id=6114) and it seems that it doesn't work with a 3.3v signal. It does works with a 5v limit input. If my understanding is correct, it's because the voltage on the base of the transistor (B...
by PsyKo
Sun Dec 20, 2015 10:53 pm
Forum: Electronics
Topic: TinyG - Configuring NC switch - Active low/high?
Replies: 0
Views: 522

TinyG - Configuring NC switch - Active low/high?

Hello, I want to configure my homing (1 per axis only) switches as NC. (So when a switch is not plugged, it can be easily identified). I'm having a lot of trouble making it work. I thought it only requires 2 wires : - 1 from the NC pin of the switch to the GND pin of TinyG limit header - 1 from the ...
by PsyKo
Thu Sep 24, 2015 7:55 pm
Forum: Electronics
Topic: Advice needed : PCB for home switch
Replies: 11
Views: 2166

Re: Advice needed : PCB for home switch

Thanks for the explanation. I'll go with your schematic then ;)
by PsyKo
Thu Sep 24, 2015 6:20 pm
Forum: Electronics
Topic: Advice needed : PCB for home switch
Replies: 11
Views: 2166

Re: Advice needed : PCB for home switch

Ok then no IC :) I actually open my eagle file to clean up my diagram (the wire are the same) and I have this, which is more easy to read : diagram.png I think it's almost the same as the first one you posted (and should work better than the first one I posted). The only thing I don't understand is ...
by PsyKo
Thu Sep 24, 2015 4:57 pm
Forum: Electronics
Topic: Advice needed : PCB for home switch
Replies: 11
Views: 2166

Re: Advice needed : PCB for home switch

cvoinescu wrote: No, you were right, you kept them separate. Check whether your LEDs work at 3.3 V -- I bet they do, only not as brightly.
They do work, but so low that given the workshop environment I almosst can't distinguish if it's on or off.
by PsyKo
Thu Sep 24, 2015 1:39 pm
Forum: Electronics
Topic: Advice needed : PCB for home switch
Replies: 11
Views: 2166

Re: Advice needed : PCB for home switch

Hello, Thank you for taking the time to look at it. TinyG includes a capacitor from v8. I own a v7 which only includes a pullup resistor. TinyG switch input is limited to 3.3v but the 5v is required for my LEDs (constructor data). I though my schematics kept both 3.3 and 5v away from each other. I w...
by PsyKo
Thu Sep 17, 2015 7:25 am
Forum: Design Ideas
Topic: V Rail covers and brushes - ShapeOKO
Replies: 10
Views: 3371

Re: V Rail covers and brushes - ShapeOKO

Hello,

Nice work. I wanted to do this for months now. Still couldn't find time to work on it.
by PsyKo
Thu Sep 17, 2015 6:48 am
Forum: Electronics
Topic: Advice needed : PCB for home switch
Replies: 11
Views: 2166

Advice needed : PCB for home switch

Hello, I've been using home switch on my Shapeoko for a long time now, but always had some noise, triggering wrong home location. I'm using TinyG v7. I'd like to add capacitor/resistor to reduce the noise and also add a state led for each limit switch on my main control enclosure. That's where I nee...
by PsyKo
Tue Aug 18, 2015 6:21 am
Forum: Discussion
Topic: Stuck in metric
Replies: 7
Views: 909

Re: Stuck in metric

Hello I can't watch the video right now, but assuming you're running Grbl, did you check your $13 setting ? After the G20, sending a G0 X1 will really move the machine 1inch or 1mm ? If it moves 1inch but report millimeters, it's probably that the $13 is 0 when it should be 1 Ok I managed to watch t...
by PsyKo
Mon Jun 08, 2015 1:23 pm
Forum: Software - CAD, CAM, Workflow Help
Topic: Gcode time estimator
Replies: 10
Views: 2734

Re: Gcode time estimator

Hello, While still in development, Goko includes this feature. It's mainly a software for CNC control / GCode streaming, but it provides an rough estimation based on the speed and feed in the GCode file (using the F keyword). It's a basic estimation since it does not include acceleration in the calc...