CNC Z Tool Touch Probe
ฝัง
- เผยแพร่เมื่อ 26 ก.ย. 2024
- In this Episode I am building a CNC Z Tool Touch Probe that can be used on a CNC Router or CNC Mill .
Now this is a prototype so I can see what I like and what needs to be improved for the final version of the Tool Touch Probe.
Finding the optimal fit of a bushing and the shaft by using material of the shelf was one problem. The Panasonic optical sensor however worked perfect!
In part two I will reveal the final version and the changes I made.
Here a Link to my website:
www.jbworxstud...
Nice work. However, the real test is when going off center. I did some intensive testing on multiple different models back in 2021. On the center most of them performed within one step with of my machine (0,00125mm), with only the occasion deviation. The interesting part started when comparing the center measurement to out of center measurements. Good designs stayed within ~0,006mm while one especially bad design got up 0,2mm between center and off center.
Thank you for sharing Klaus-Michael! I think you are spot on and this will be my findings as well. There is a bit of a tilt that is created once the tool touches out of center and the higher the spring loading the higher the force required to push it down and this will creat the tilt if there is any play in the mechanism. I will test this as well. At the moment I am machining one housing without the bushing but using a H7 reamer and machining the shaft for the best fit.
This is precisely what I’ve been looking for in the last few months and you’ve delivered!
Nice that you can use my content !
Very nice smooth motion on the shaft. snirk yeah baby.
😂
Wow that is really good accuracy. Hope said accuracy holds against more testing!
I think I got a really good sensor. I have 2 more on the bench that I will test as well. We shall see, in former tests I got 0,02mm max but also a lot of dead on 0 repeats. So we will see.
Clean and straightforward.
Thank you Gerrit
Very nice! Its funny because since your video about limit switches, I've replaced all my induction sensors for the Panasonic's for that sweet sweet accuracy and I also saw the potential for the Z probe but seems like you beat me to it! (Although Im planning on going the 3D printing route for the body instead!)
Now that is awesome ! Excellent that this worked out for you! I might have a few extra housings in plastic available later on that you can get on my website. I will make no additional stock so when they are gone they gone lol. And thank you for reaching out.
Great stuff man! Keep it up!
Thanks! Will do!
Hmm, I need to build this 👍🏼👍🏼
Thanks for c o MI g up with great ideas.
Thx Nicolas, plans are available soon with parts list
It's a good job there are no voice activations for your probe as it would have said a few bad words to like how many time do you need to be told the error is 2 tho ok duh
😂😂😂👌
Nice! next step is to make a more thermal stable version? What sensor are you exactly using? There is a bug in the Eding software while using tandem-homing. If only 1 of the 2 sensors is active when a homing procedure is started, it tries to tear your bridge apart. Either ugprade to the latest patch or move your g28 a few mm beyond your homing sensors. I discovered it and was able to reproduce it, Eding has somewhat fixed it in the latest version. (for both V4 and V5).
Yes you are correct the plastic needs to go - way too much movement in it. I would also like to use stainless steel for the plate as it does not corrode. I use the Panasonic PM25 series with 3m wire in NPN. I have 3 more arriving today in a different form factor. I will be very curious if these show the same accuracy or if the one I have is just a fluke.
Yes, I had the new Eding Software version downloaded and then read in the forum the problems and lucky me never installed it. I do drive off the sensor so by probably 5mm. Right now I have my head in this macro programming what a dread. Do you have Macro for a 3D sensor ?
@@JBWorx thank you. Do you need a macro for probing?
Yes I downloaded one from GitHub but have not installed it yet. Currently I use my own for the Z-Probing but I need one for the 3D Probe that I bought.
Nice video!
Thx 🙏
That is excellent job!! Mb your own cnc project in the future?)
Yes could be we will see
Sweet. Is the whole CNC your design? Like are there any plans/BoM available?
It kind of grew over the years to what it is today. I don’t have plans for it as I am somewhat old school and dew most parts out on paper and then just machined the individual parts. I think the PrintNC is pretty good and easy to upgrade you might like to check into that one.
Why use a sensor with mechanical parts and not just a continuity trigger?
Because there are several tools that this is not recommend for. For instance a PCD tool would be damaged by the touching force of the plate that you make contact with. PCD= Polycrystalline Diamond
Hi Your dust extractor cyclone looks interesting. Do you have any information on it? Thanks in advance and I really like your informative practical videos that also don't woffle on endlessly which some other guys do!! Cheers Andrew
Thank you Andrew! I assume you mean the yellow one? It’s made by Oneida and it’s an older unit. They do not have that exact model anymore but what I liked about it is that it is on wheels. I also use a small “dust deputy” attached to my regular shop vacuum. I think it’s doing a great job for the Router. However for a wood shop the large one is a really good addition. Here a link
www.oneida-air.com/dust-collectors
@@JBWorx Thanks very much for that information. Having the filter on top has given me some ideas for setting up a system in my own workshop. I have the usual problem of not having enough space and being fairly disorganized in the way I do things. Keep up the good work and have a good weekend. Just in case your'e interested I bought some of the new Naniwa diamond sharpening stones (a kind of cross between diamond and Japanese water stones) they are the best ones i've tried unfortunately very expensive but worth it! Cheers Andrew
I will check them out thanks for letting me know … and yes my workshop is small as well. Take care
A quick question if I may, re: your Accusize indexable, did you have any issues with vibration due to imbalance. I bought their set of 3 offered with 1/2" shaft (1/2", 7/16",5/8") but they are extremely out of balance due to having only one insert. Hard to fathom they didn't design the tool to account for this. I probably won't use them unless I can grind off some material to bring balance into some reasonable range, and help out the spindle bearings. Otherwise I guess I am stuck with common endmills for facing. Funny that I actually bought a set of fly cutters in hopes I could use the little 1" at 6000. I am not sure I would even run the spindle up for a test. Hope you are well.
Hi Chris, the one I have has 2 inserts and there is no vibration at 12k -14k rpm. You will not be able to Machine at 6k rpm if you have a 24k rpm spindle as there is virtually no torque. In a Mill Running one insert would not cause vibrations due to the low rpm. I guess you have a paper weight lol 😆
@@JBWorx Just a little update. The fly cutters I bought and had dismissed as possible solutions? The kind with the square HSS cutter.... Well I have the 1" size running with minimum vibrations and am preparing a test piece to test it on in readiness for machining my 400 x 500 fixture plate. Very satisfying.
Excellent that you got one step further !
How do you measure the exact height of this probe at the moment of contact? My probe is much simpler. A heavy piece of steel plate ground accurately flat and measured exactly for thickness. This has the ground wire attached. Then the standard croc clip on the tool gives me the Z-zero position.
Yes I know this type of Z - tool touch plates however once you start using single flute high polished bits or PCD tooling this will not work. So my controller does not take a measurement when the signal state changes the first time because of the higher approaching speed. It accounts for the height in the moment it backs off very slow and precise. I simply set exact zero to the machine table where the probe is going to sit and then did the process of touch off manually. I noted down the distance table to touch probe. That’s it.
@@JBWorx that makes sense. For my finder I use a reasonably fast approach to a touch. Then I back off 1mm and drop very slowly. That second touch is the true height. Then lift out of the way and it's done.
Yes that sounds like a good practice.
6:00 it was just regular aluminium plate, please ? H22 ? Thank you
Yes it was, just don’t use something from the Home Center it’s pure aluminum and will not cut well.
Can you tell me where did you get the information needed to install and setup a touch probe please. I would like to keep eding but if I find nothing to help me I just remove everything and install another software
It’s in the handbook 😀. Eding also has basic functionality for the macros to run it. One easy upgrade is to use the one from Sorotec. Hi to theire website and you can download the Eding Macro, it also contains the tool touch Probe macros. Eding is a Great Software I would keep learning it as it is really worth it.
Hi what was the sensors type/model?
Have a look at the Panasonic PM25. There are different mounting versions but the sensor itself is the same.
Thanks for the quick response! will do @@JBWorx
👍
It is a good Idea to integrate over shooting or over travel switch to trigger emergency stop as in the commercial devices.
Well I though about it and the stop on commercial machines are not E-Stops created by a switch but a regular halt / stop created by the overtravel from the expected distance. The tool stick out is measured and initially placed into the tool table the amount of allowed over travel is set in the software. This will also detect a broken tool … what this probe on commercial machines is used for as well.