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winder / Universal-G-Code-Sender

A cross-platform G-Code sender for GRBL, Smoothieware, TinyG and G2core.
http://winder.github.io/ugs_website/
GNU General Public License v3.0
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Limit switch issue #444

Closed jahnj0584 closed 8 years ago

jahnj0584 commented 8 years ago

Ive switched to a new machine with the same gshield and limit switches. I wired it up like the old machine, with them being NC (ground on pin 2, other on 1 (C and NC)) and homing now doesnt work.

With the multimeter, Z and X switches read 1 and then drop to nothing when I click the switch. The Y goes from 1 and only drops to 3 when I click the switch (faulty switch?) (My multimeter is analog, so 60ohms is on the left (no signal) and 0 is far right.

When I home, the Z will just rise and crash into the switch and I get an alarm.

Any ideas? Is it just the X causing mayhem? Is there any way to see in UGS if a switch is actuated?

faultylee commented 8 years ago

Feels like wiring problem if you didn't change the settings. It should either be 4~5V dropping to 0V or the opposite. 1~2V is weird. You might also want ask here https://github.com/grbl/grbl

winder commented 8 years ago

I think feedback on which switch is activated is coming in grbl 1.0... for now I'm not sure what UGS can do to help troubleshoot this sort of problem.

jahnj0584 commented 8 years ago

I only have an analog meter now and I think I was using an Ohm setting....I still gotta watch a few YT vids on how to use these properly and have a digital one in the mail.

I was just wondering if there was a command I could send that would be like limit switch (pin X) = activated/no signal

faultylee commented 8 years ago

I guess you can always upload a simple Arduino sketch to read the limit GPIO pins. Make sure to configure the input as per your Grbl config (Pull up or external pull down).

jahnj0584 commented 8 years ago

I have 0 knowledge with arduino, besides sending the light blink sketch to make sure it works when you get it. Is this something someone here could write up?

On Wed, Aug 3, 2016 at 1:34 AM, faulty.lee notifications@github.com wrote:

I guess you can always upload a simple Arduino sketch to read the limit GPIO pins. Make sure to configure the input as per your Grbl config (Pull up or external pull down).

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/winder/Universal-G-Code-Sender/issues/444#issuecomment-237135307, or mute the thread https://github.com/notifications/unsubscribe-auth/AQlzDJu42jN2F6VEahXcNf85oG4agXimks5qcBo6gaJpZM4JWWWt .

faultylee commented 8 years ago

If you can wait, I don't mind to hack one up over this weekend. For the meantime, you should try ask in other forums, such as http://www.shapeoko.com/forum/viewforum.php?f=3 or http://electronics.stackexchange.com/search?q=grbl

Btw, you might need some basic electronic skill to fix the actual problem. If you can find a local buddy to help out, that would save you a lot of time.

jahnj0584 commented 8 years ago

I have replacement switches here and a multimeter in the mail. If you could, that'd be great! I won't be able to mess with them until Monday anyways.

For what I do run now, I just reconnect the machine at my work 0 and start it from there.

On Aug 3, 2016 10:04 PM, "faulty.lee" notifications@github.com wrote:

If you can wait, I don't mind to hack one up over this weekend. For the meantime, you should try ask in other forums, such as http://www.shapeoko.com/forum/viewforum.php?f=3

Btw, you might need some basic electronic skill to fix the actual problem. If you can find a local buddy to help out, that would save you a lot of time.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/winder/Universal-G-Code-Sender/issues/444#issuecomment-237421286, or mute the thread https://github.com/notifications/unsubscribe-auth/AQlzDNd8E10B7WF1o-YvUBW5cAiP_FPgks5qcTqAgaJpZM4JWWWt .

faultylee commented 8 years ago

Do you mind to share you setup in more detail? Btw, I've been using my Shapeoko2 for 2 years now without using limit switches, don't really find the need to. I did set it up once to learn the "real" CNC workflow, but had some problem with the wiring after a while, and stop using it since. Any particular reason why you need to use the limit switches?

jahnj0584 commented 8 years ago

Mostly for templates and jigs/repeat operations as I do small (2-10 piece) production runs. There also the G28 at the start of my Post that causes issues if you don't have homing as a possibility.

I'll be doing two sided milling soon and need them then for sure.

On Aug 3, 2016 10:12 PM, "faulty.lee" notifications@github.com wrote:

Do you mind to share you setup in more detail? Btw, I've been using my Shapeoko2 for 2 years now without using limit switches, don't really find the need to. I did set it up once to learn the "real" CNC workflow, but had some problem with the wiring after a while, and stop using it since. Any particular reason why you need to use the limit switches?

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/winder/Universal-G-Code-Sender/issues/444#issuecomment-237422514, or mute the thread https://github.com/notifications/unsubscribe-auth/AQlzDE78GEsY8YKJE6CC0ejhguPNlkVOks5qcTyHgaJpZM4JWWWt .

COEP-Anasane commented 2 years ago

We want to add limit switch to a X-Y plotter. We are using Universal GCode Sender Version 2.08.

$20 = 0 (Soft limits enable, boolean) $21 = 1 (Hard limits enable, boolean) $22 = 1 (Homing cycle enable, boolean)

are set as shown. Still it is not taking the limit switch input to stop the process of plotting. Can someone help us?