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A short video showing how to wire up inductive proximity sensors in our homemade machines. These sensors are used to detect metal. Proximity sensors are useful for example as limit switches in CNC controlled machines like CNC routers, mills, or lathes but the use of them is really wide.
https://youtu.be/ive9NJHU-rA
I use those sensors on my lathe conversion.
Here is a photo showing the X-axis sensor in place
Attachment 42583 Click for full size.
Here is the setup with the trigger bar in place, the gold coloured piece.
Attachment 42584
For both X and Z axis I use one sensor on each axis with two triggers. Sometimes two sensors are used with one trigger. It depends what you want to do with the information. In my case I just wanted limit switches.
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Thanks GBWM! We've added your Proximity Sensor Wiring to our Wiring category,
as well as to your builder page: GBWM's Homemade Tools. Your receipt:
<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-proximity-sensor-wiring"> <img src="/uploads/254689/homemade-proximity-sensor-wiring.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-proximity-sensor-wiring">Proximity Sensor Wiring</a> <span> by <a href="https://www.homemadetools.net/builder/GBWM">GBWM</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/cnc'>CNC</a> </div> </div> </div> </div>
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Thanks tonyfoale! We've added your XZ Limit Switch Setup to our Lathe Accessories category,
as well as to your builder page: tonyfoale's Homemade Tools. Your receipt:
<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-xz-limit-switch-setup"> <img src="/uploads/254694/homemade-xz-limit-switch-setup.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-xz-limit-switch-setup">XZ Limit Switch Setup</a> <span> by <a href="https://www.homemadetools.net/builder/tonyfoale">tonyfoale</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/lathe'>lathe</a> </div> </div> </div> </div>
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Do you use them as home switches too? I'm wondering how accurate are these actually as I'm thinking of using them in my next machine as home switches.
I do not have nor need homing switches on this lathe. So the answer is NO. See https://www.homemadetools.net/forum/...662#post182609Quote:
Originally Posted by GBWM
If I were to need homing switches on which to base repeatable positioning I do not think that I would trust these proximity sensors to provide the required accuracy. For homing I would choose optical sensors, I used the proximity sensors mainly because I had a few left over from a project of nearly 40 years ago. They do have the bonus of being fairly rugged and tolerant of cooling fluids etc. Optical sensors need protection from the fluids. Hall effect sensors offer better protection but I would not trust their precision as much as optical like these, which are cheap as chips.
Attachment 42602
I use them as homing switches on some of the large CNC plasma machines that I manufacture and they are extremely accurate. (bearing in mind that you get a wide range of proximity switches which vary in quality and of course price)Quote:
Originally Posted by GBWM
There are also magnetic sensors that look almost identical and they will detect either a N or S pole from a short distance just like these inductive sensors. They come stock with the inexpensive tachometers that I've installed on all my equipment:
https://youtu.be/M0AiAv8XL7c
Can you put some measured numbers to "extremely accurate"?Quote:
Originally Posted by Tonyg
Here is a link to sensors in general.
Sensor link
To be accurate, this was on a lathe so they are X and Z axes not X and Y.Quote:
Originally Posted by DIYer
The spindle axis on a machine tool is usually called the Z axis.
Fixed, thanks.Quote:
Originally Posted by tonyfoale
Trigger points repeatable to 0.0001 inch (0.00254 mm)
That is very good.Quote:
Originally Posted by Tonyg
Thank you sir. I have one of those and have lost the instructions with the hookup data. Now I can install it as soon as I do the 50 or so things in backlog. I have been working on a house to sell lately and it has been eating up all my time.Quote:
Originally Posted by Guy Marsden
