Hi,
Struck a strange one. I crashed a limit switch... don't ask. Replaced the switch but now it seems to be bouncing.
Tried swapping switches & inputs but problem persists. Seems to follow the X axis only.
Switch is a Metrol CS067A/B. Not sure why or is there a recommended de-bounce circuit.
Regards,
Michael
Post your wizard screenshot so the guys who know what they’re doing can help you out. I don’t know what you mean by bouncing?
I do know that I have seen my sensors trip and reset on opening cnc12, but they function fine and I think it’s from how I exited the software or maybe the way I have my sensors programmed or the machine position or the fact they aren’t all installed yet. I honestly haven’t been that worried about it since they work fine and I’m assuming it’s something I’m doing wrong.
Just like if I have my spindle on and exit the software without shutting it down, then reopen the software the reset button will be tripped. The only reason I have exited this way is because my spindle isn’t currently hooked up since I’m still finishing my build.
If you’re sensors work, and you if crashed the machine because it wasn’t homed and the soft limits weren’t active yet, maybe it was because you went + on a - limit switch or vise versa? I did that when I was first setting up my proximities. It’s going to wind up being something simple, Marty or Keith will help you out. Trust me everything I struggled with was simple in the end and just part of learning a new system. The controller from my short experience is rock solid and all the issues I have had have been my fault.
Good luck buddy you’ll get it figured out.
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By bounce I mean that the limit trips when pressed, when the switch is released the system clears then immediately re trips.
lim4.jpg (40.25 KiB) Viewed 4922 times
However this only appears to occur if I reset the clear the system. I cam home ok & otherwise able to move the axis, its just annoying.
Regards,
Michael.
Do you have the switches installed on the machine? Have you tried taking the switch that won’t clear and wire it to one of the inputs that is working for the other axis? That way you can eliminate the possibility of a bad switch or a wiring problem. I’m using proximity sensors on my machine and I don’t know anything about the switches you have or how you have them wired. Maybe you should post a picture of your switch wiring as well as what wiring diagram you used so when someone else that knows more than me jumps in they have all the information.
As far as the wizard goes it’s similar to my settings but I have 4 sensors and they are installed in inputs 1,2,3,4. Did you maybe wire it up incorrectly when you installed the new switch? It sounds like a wiring or switch problem maybe triple check your wiring if the other switches are functioning properly, I’m assuming that since it’s staying tripped that you get no machine movement right now. I’ll have to hook my sensors back up and see if my machine does the same thing or if they just trip and clear at start up, I honestly don’t remember since I haven’t been able to work on my machine for a week.
Also if you look at my build thread you will see a section when I was working on getting my sensors working and Keith and Marty were helping me out. Maybe it will be helpful to you in figuring out what you’re doing wrong. I know it’s frustrating trust me I had plenty of small issues while I was trying to figure everything out.
Dan
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Oh you know what I just thought of do you have soft limits set up? It might be the x axis position in relation to the soft limit? Say you have the limit set at 0 and 20 and you’re at -10, I think it will show a limit trip even though it’s not the switches. Sorry I forgot about the soft limits.
Dan
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If it were the software limits, the message would be "907 _ axis travel exceeded".
The "407 __ limit (#___) tripped" message means specifically that the limit switch input circuit opened.
If the PLC Detective utility is available with Acorn, you could use its logic analyzer to verify the action of the inputs.
If you specify (on the Machine Configuration -> Motor Parameters page) that the input in question is a home switch, but not a limit switch, then you will probably be able to home to it without getting errors even if it does bounce. I don't recommend running that way in the long term, but it may be helpful for troubleshooting.
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Thanks Guys,
Dan, it is set up as a home/limit switch, this type is repeatable to 0.005mm.
I have tried different switches & different inputs to no avail, I have checked the switch with multi-meter & appears clean.
I have soft limits set as well.
CNCSNW, using the diagnostics page I can see the switch trip then clear however the front screen shows the switch re-tripping even though the input in diagnostics is clear (green).
Regards,
Michael
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mick41zxr wrote: ↑Sat Oct 20, 2018 4:22 am
Hi,
Struck a strange one. I crashed a limit switch... don't ask. Replaced the switch but now it seems to be bouncing.
Tried swapping switches & inputs but problem persists. Seems to follow the X axis only.
Switch is a Metrol CS067A/B. Not sure why or is there a recommended de-bounce circuit.
Regards,
Michael
IMG_0747.jpg
IMG_0750.jpg
report_F045DA486298-0813181135_2018-09-29_18-50-47.zip
That is a normally open switch. You really should use Normally Closed switches.
Are all connections from the switch to COM and INPUT soldered and very sound?
Do you have another TYPE of switch you could temporarily test with? Such as a lever type Microswitch?
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
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mick41zxr wrote: ↑Sat Oct 20, 2018 4:22 am
Hi,
Struck a strange one. I crashed a limit switch... don't ask. Replaced the switch but now it seems to be bouncing.
Tried swapping switches & inputs but problem persists. Seems to follow the X axis only.
Switch is a Metrol CS067A/B. Not sure why or is there a recommended de-bounce circuit.
Regards,
Michael
IMG_0747.jpg
IMG_0750.jpg
report_F045DA486298-0813181135_2018-09-29_18-50-47.zip
That is a normally open switch. You really should use Normally Closed switches.
Are all connections from the switch to COM and INPUT soldered and very sound? Acorn terminals tight?
Move wiring around, Acorn input header and see if there are any loose connections.
Do you have another TYPE of switch you could temporarily test with? Such as a lever type Microswitch?
Even a jumper wire to touch from COM to the Input terminal, simulate the opening and closing of the switch.
Can you take a picture of your control cabinet and post?
Is there a VFD in the cabinet? Do you have all grounds going to one terminal point in the cabinet?
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
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