I’ll try to get a photo of the exposed wire. But I’ve been having constant THC Voltage jumping from 10V to 250 V. I’ve noticed every time I press on the Y1 Limit switch the voltage drops to zero. I noticed the motors cables Yellow, Blue.. Cables are showing and now fully sleeved in the little clap. Could that cause the issue? Or am I chasing the wrong path. I know electrical issues are the biggest nightmare but I’m trying to see what happened.
I’ve had Tech support send me new Limit switch cables and motors and Modules for the Electric box.
A bad limit switch grounding out to the frame of the machine. Some of the first machines were sent out with limit switches that had no gasket around the switch so water ingress may cause them to fail.
Also replaced the motor with a clean motor where the cable isn’t showing. I did notice when I press on the Y1 limit switch I instantly drop to 0. When I unscrew the limit cable I goes straight to zero. Is that what you’re talking about?
Oh the little rubber thing where the limit switch connects to?
Around the actual red button part of the limit switch. Some of the older ones did not have a membrane there so water could get in between the red little switch and the body of the limit switch
I had issues with torch rise because of this in the past
I’ll check it out and see if that could be it.
Is there voltage being displayed in fire control even when you’re not cutting?
Yes it’s constantly resting at 30ish…
I couldn’t find a membrane on in and now im running at 300 voltage (before i took off the limit switch…)
unplug all the limits from your electronics enclosure and see if this drops to 0.
Voltage is leaking into ground somewhere in wrecking your reference.
Is there a way to discharge the storage voltage safely? I’ll get the switch back on do that.
I’m not sure what you’re saying? There’s no battery holding voltage somewhere. If you’re talking about what fire control’s seeing. the 300 volts it’s talking about could be as little as a 4 volts difference in its reference because it upscales it 73 to one to be viewed by you.
When do your new limit switches come in?
IF he’s using divided voltage, which he probably is.
The VIM on either the divided or the raw puts out a 73 to 1 signal for the electronics.
The circuit board should only be seeing 1 to 5 volts input for the THC signal.
My understanding is he’s showing 300 volts while it’s not firing?
THC is controlled by the voltage reading from the torch/negative and the work clamp/positive. The 300 volt reading called raw is basically a dead short between the positive and negative when the torch fires. THC normally does not have anything to do limit switches when the torch fires. Unless their is a short from the positive/work clamp to the negative/torch from a bad limit switch or the wiring of the limit switch to the table.
