Direct mounting ER20 touch probe (this time using all the tools)
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- เผยแพร่เมื่อ 4 ก.พ. 2025
- A follow up to my previous video about making a touch probe. This is a modification of that design that fits directly into an ER20, either a toolholder or a spindle nose.
I have an ER20 high-speed spindle, and one of the reasons is sees little use is the incompatibility of my existing probes.
The previous video is here: • A Simple Touch Probe m...
The 3D model can be viewed and downloaded here: a360.co/3HHQlHs
As with others, I'm agog at the angle drilling. It's astonishing what you can do with that mill.
If you were to machine a 'ball', instead of the ER taper, you could leave a small amount of space around where the retaining ring interfaces with the probe. Then drill and tap 4 set screws at 90' offsets. Using those screws, you could adjust the body within the holder, while running the ruby against a dial test indicator, until it runs truly concentric with the spindle.
I added an adjuster to the existing design: photos.app.goo.gl/MhEp1XDGMSq1kouA9
@@andypughtube
Another way to skin the cat! Nice job!
Awesome Andy. Is this a cliff hanger? Next video revealswhat the run out is measured at the ruby?
You really get the most out of your machines with LinuxCNC. Brillian use of the virtual axis.
good job andy
wobbly tip
Excellent work. As mentioned above, it looks like the ruby is not concentric with the probe shaft?
Awesome video!
Brilliant!
That angle drilling was really cool. What would you say is the main cause of the remaining runout, flex in the pins from the back screw pressure?
I think you could machine a groove into the center piece and use set screws from the bottom pushing across the groove to provide enough flexure adjustment to center the stylus. Adjust the groove width and depth based on the stiffness of the material.
An alternative to soldering to the pins could be constructed with a copper clad PCB milled (like a washer but with electrical connections) and screws to maintain electrical contact with the pins. I modified your design but haven't made it yet. I tried to attach my modified F360 file, but my comment didn't post???
I am working on a follow-up video which will attempt to prove that (within reason) the odd-centre probe does not matter if you have a spindle encoder. (and there are ways to work around the lack of an encoder too)
@@andypughtube Looking forward to the spindle encoder with this. I do think it makes sense to have an adjustable center. I just verified in Delrin that grooving down to a 8mm diameter, 10mm wide can easily be adjusted +-25 thou. I resized slightly for 5mm pins and the delrin rod I have on had. Very simple design! Add another task to the project list.
Have you seen the Grimsmo "KMT 110 - DIY Tormach touch probe tips" video?
Most of those WiFi aerial connectors are good for a few insertions only. I wonder if the plastic parts could be 3D printed to a decent accuracy. Interesting vid again 😀
It will stay plugged in pretty much permanently, it's just a way to make it possible to change the cable if it gets damaged.
most cnc user not newer use wifi, and not sure need 2 wire probe have most used probe and more not need newer.
@@mattivirta
He's not using wifi. He's using a wifi CONNECTOR in order to make the cable connection.
Most CNC users DO have wifi, but aren't using it to connect a homemade probe to their CNC machine.
normal hobby cnc user not use ER20 ,totally out of budget, most cnc users use ER 11 and ER 16 spindle not newer ER20.
Not true.
@@Wrenchmonkey1 totally have true, i not has seen newer any hobby cnc user were have ER20 or servo motors because have normal user out of budget super expensive all, not possiple buy. maybe if have millionaire. expet my retiree salary not can buy, if salary have 800/month need save money many year can buy all expensive parts. need live too and buy food and pay rent, elektric,internet,phone, many.