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Tool Length Sensor
Posted: Thu Nov 26, 2020 11:49 pm
by tuffduck
Hello,
I have a tool length sensor that was given to me but being a novice at this I have no idea what wires should be connected to where from the sensor to Acorn.
I have made a donation to Swissi and plan on using his app.
I have attached a diagram that was in the box but confused more than I understand.
Any help would be greatly appreciated.
Thank you.
Re: Tool Length Sensor
Posted: Fri Nov 27, 2020 11:37 am
by martyscncgarage
Would be nice if you post a picture of it.
That document seems to indicate it is a NORMALLY CLOSED sensor. You need to set it up as such.
You need to connect one wire to Acorn Power Supply COM and the other to an unused INPUT and program it
Follow these directions:
https://www.centroidcnc.com/centroid_di ... _setup.pdf
Re: Tool Length Sensor
Posted: Fri Nov 27, 2020 12:53 pm
by tuffduck
Here are a couple pictures of the sensor I have.
Re: Tool Length Sensor
Posted: Fri Nov 27, 2020 2:22 pm
by swissi
tuffduck wrote: ↑Fri Nov 27, 2020 12:53 pm
Here are a couple pictures of the sensor I have.
I can't read Chinese but it looks like this device has two Normally Closed switches with two wires each. One switch is for the actual Tool Setter and the other is a safety switch that opens when the Tool Setter is pushed too far down in a case when the first switch does not stop the motion.
Use an Ohm Meter and check which wire pair belongs together. If you find a pair that's looped trough, just slightly press the tool setter and if the switch opens, this pair is the Tool Setter pair. If the switch opens when you press the tool setter all the way down, this is the safety switch pair.
Connect the safety switch pair either as an external Feed Hold switch or daisy chain it into your Emergency switch wiring.
Wire the Tool Setter pair as NC type TT as Marty described.
-swissi
Re: Tool Length Sensor
Posted: Fri Nov 27, 2020 7:30 pm
by tuffduck
Thanks, I will try what has been suggested and report back.
Re: Tool Length Sensor
Posted: Sun Nov 29, 2020 2:38 am
by CNCMaryland
swissi wrote: ↑Fri Nov 27, 2020 2:22 pm
tuffduck wrote: ↑Fri Nov 27, 2020 12:53 pm
Here are a couple pictures of the sensor I have.
I can't read Chinese but it looks like this device has two Normally Closed switches with two wires each. One switch is for the actual Tool Setter and the other is a safety switch that opens when the Tool Setter is pushed too far down in a case when the first switch does not stop the motion.
Use an Ohm Meter and check which wire pair belongs together. If you find a pair that's looped trough, just slightly press the tool setter and if the switch opens, this pair is the Tool Setter pair. If the switch opens when you press the tool setter all the way down, this is the safety switch pair.
Connect the safety switch pair either as an external Feed Hold switch or daisy chain it into your Emergency switch wiring.
Wire the Tool Setter pair as NC type TT as Marty described.
-swissi
Exactly what Swissi said here. Keep in mind that you do not need to hook up the over travel safely for it to work properly.
Re: Tool Length Sensor
Posted: Sun Nov 29, 2020 12:58 pm
by swissi
Also note that a NC type probe must have a Detect Input if you want to make it pluggable but if you wire it permanently, no detect input is needed.
-swissi
Re: Tool Length Sensor
Posted: Sun Nov 29, 2020 2:23 pm
by Gary Campbell
Swissi....
The OP is using a tool measure, not a probe
Re: Tool Length Sensor
Posted: Sun Nov 29, 2020 4:01 pm
by tuffduck
I was planning on using an aviation connector but leaving it connected. Isolated the two wires and have them installed on Com and input 7. I used the wizard to configure the probe and input. Use the diagnostic menu to determine the TT type. Installed ProbeApp. Should one of the other two wires go to Input6?
Re: Tool Length Sensor
Posted: Sun Nov 29, 2020 6:44 pm
by swissi
Gary Campbell wrote: ↑Sun Nov 29, 2020 2:23 pm
Swissi....
The OP is using a tool measure, not a probe
I was using the term "Probe" in the sense of being the category that comprises all probing devices like Touch Probes, Tool Setters, Tool Touch Off plate, Triple Corner Finder plates etc. in the same way the CNC12 Wizard categorizes all the Input definitions like ProbeTripped, ToolTouchOffTriggered etc. under "Probe". What I said about the requirements for NC type probes is true for all these devices.
tuffduck wrote: ↑Sun Nov 29, 2020 4:01 pm
Should one of the other two wires go to Input6?
You can connect one wire to Input 6 and the other to COM. Configure Input 6 as FeedHold2 and set it to type NO (Red).
-swissi