BLtouch VS 3Dtouch 3D Printer bed leveling sensor match up
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- เผยแพร่เมื่อ 28 พ.ค. 2024
- In this one I test and compare the original BLtouch sensor with the clone 3Dtouch sensor.
Also check out Tom's sensor video for my in depth explanation.
• Autoleveling on 3D pri...
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Nowadays 3D Touch is much closer to BLTouch from design perspective. It has the same wire harness, same style plastic pins. It is probably hard to tell what is the difference when using firmware like Marlin, Kingroon etc. However, In Klipper you will find the difference when you begin to test newly installed 3D Touch. It will respond as intended on BLTOUCH_DEBUG COMMAND=pin_up and BLTOUCH_DEBUG COMMAND=pin_down (of course, if the harness connected correctly), but when you switch to the touch_mode and check touch pin and it will retract, and then check the state with query_probe command, it will never give you the TRIGGERED state. I spent hours trying to figure out why this command refuses to work, blaming contact loss and so on. Then I found the answer. The official Klipper responded on this in the topic #5088 and the answer was like "Klipper does not support clones when query_probe.". Other than that everything like G28 works fine and it stops when touch pin on descending. Oh, and probably on 3D Touch you will need to check pin itself (the pin side where the magnet is mounted). Magnet should not move inside the pin, otherwise this will give you big inaccuracy in sensor readings. In some videos people cut the plastic on the magnet side of the pin and glue it on.
Things have changed a lot over the years. I to have some issues with the touch sensors and Klipper. Lots of great info in this comment. Thanks for the post.
Even though it's a few years old by the time it was relevant information to me, I greatly appreciate it. Short, and straight to the information. Well spoken and gave me good information in a timely manner!
Thanks!
Just found this video and feel the exact same way. Thank you for the great info delivered quickly!
Dude. I unfortunately don't get to say this enough (especially not on youtube anymore). This a real honest review with proper research done. I like this very much. Thumbs up! A lot of people automatically assume that something made in China or any other country than European or USA is worse. And as such, let that opinion colour their review. But in the case of small consumer electronics, the differences are to small for any normal person to notice. And no, i'm not from China, I'm from Europe. Good review!
I appreciate that, thanks for the comment!
I recently found your channel and I can only say: keep it up, you are doing a great job.
Thanks man!
Thanks for this benchmark and these explainations Chris. It will help us to make a choice
Jean-Patrick Le Mouël Any time, I hope it helps. Thanks for watching.
Thanks for your short and informative comparison between two sensors. It helps a lot. Keep going!
Thanks for watching! Will do!
Thanks again. I have had the same experience. The difference is that you came with numbers and the proof! Great work.
Great to hear! Thanks!
Finally, someone who gives a concise yet informative description of the accuracy and usability of a popular touch sensor. I watched Tom's guide and was left impressed and confused all at the same time. Thanks for the reality check.
Bruce Cushman Hey Bruce! Thanks for the comment. Much appreciated.
Between all of the leveling options, the touch, inductive, capacitive & piezo which one do you use or prefer?
I much prefer the inductive types. They are super cheap, and surprisingly very accurate.
In 2020, even the no-name BL Touch clones now come with the extra wiring and accessories.
After having some problems with my clone's pin not deploying, I replaced the metal push pin with a similar length of 1.75mm ABS filament that I straightened. The magnet for the hall effect sensor is just held onto the pin with some heat shrink tubing that you can easily pull off.
The clone's standard deviation went from between 0.03-0.07 to 0.01-0.02.
I didn't think such a small reduction in weight would increase the accuracy and consistency that much but there you go.
I guess that's why the BL Touch switched to plastic pins lol.
Cool results, that is an interesting test. I guess that is why.
I felt it necessary to edit my comment here. I had already ordered a Bltouch clone before watching your video. My clone turned out to be a dud. The servo mechanism did not work. No amount of cleaning , adjusting or tweaking made it work. I went and ordered a genuine Bltouch to replace it and it worked right out of the box. No adjusting or fiddling required. The Many hours I I spent trying to debug the clone could have been better spent doing anything besides messing with a piece of crap. I can't recommend the clone to anyone really. There are many on the forums that have suffered the same fate as me with the clone. My advice is to save your money elsewhere, not on this part. 😩
Good video! Nice job.
Thanks for the comment, thanks for watching!
I did order a *cheap* 3DTouch and have had my fair lot of problems with it. When probing my bed, I get results that varies up to 0.15 mm from one bed probe to the next!!! (using bed visualizer plugin for Octopi) I will be ordering the real thing in hope it works better.
@@Zolt Same here.
Yea, I have exactly same experience. Spend hours trying to fix that 3DTouch crap and end up ordering genuine one.
Nice to see that you probe is working within the tolerances. Got my third 3D Touch and the tolerances are all up to 0.2 mm. This shows that there is no consistency in production and qc. Installed a genuine one and works like a charm.
I have had a couple of these since this video was made and the knock offs seem to be very unpredictable indeed.
I have the 3d touch and it works like a charm.
Cheaper and works perfectly. Would buy again
(on a cheap Anet A8 ;)
Kro Gon Awesome, thanks for the feedback.
How id you get it to work with 3d touch. When i attached the 3d touch, the nossel is lower than 3d touch by 8 to 10mm
Hey Chris, another great video! Thank you.
Thanks Dave!
Thanks Chris just what i needed to know.
Awesome Martin, you're welcome.
Thanks Chris, someone else I follow on Twitter liked the vid so I thought I'd watch it myself. Cheers, JAYTEE
Thanks Jaytee!
really nice and concise information here!
Thank you so much!
Like your straight shooting Cris
Thanks Larry!
Thanks for the video. I had a bit different experience with 3dtouch sensor on my Ender 3... The standard deviation in corners was between 0.06-0.2mm, in the center it was around ~0.02mm, so i was able to print only in the center of the bed. Tried to tight everything on the printer but nothing helped. When i replaced the sensor with the original one (got it from Amazon) i got the deviation between 0.003-0.009mm which is way better... The first layer is now perfect...
Awesome! I heard the new bltouch was even better. Do you have the one with the plastic probe? They say that one is really good.
Same here I do not Recommend the Clone one ! simply waste of money ...buy the Genuine BLTouch (I have TriangleLab 3d touch deviation between 0.045 to 0.15)
I've got one clone 'BLTouch' that works quite nicely. And another that never worked. Then again, my genuine BLTouch only lasted a couple of months before it's died (probably my fault when clearing off plastic), but when you're upgrading a printer that cost a little over £100 a £40 part is quite a lot.
The problem is that when you can get a functional clone for 1/4 the price then people feel they are being overcharged. Antclabs could work with a Chinese manufacturer to do licenced parts for £20-25 and I think they would sell sufficiently more to make more money out of what is genuinely a useful design.
For those saying about copyright, that would offer little protection from someone creating something functionally comparable. Antclabs claim to have a patent, but the design looks closely based on an open source design that was published a year before their first model, so their patent is likely unenforceable. It also means that they only refined an open source design and then claimed it as proprietary, which in stifling use of similar designs based around similar (originally open) principles is arguably even worse than the clones.
Hey David, thanks for this comment. These are some interesting point that I had not heard before.
Good video! :)
ive been modifying a cheap ass anet a8 with the cheapest parts i can find and the 3d touch have been the best one yet.
Nice! If you haven't done it already check out upgrading to marlin firmware. th-cam.com/video/2uX5_rI1QM8/w-d-xo.html
Great video
Clear and objective
Thanks!
Glad it was helpful!
STRAIGH TO THE POINT. I LIKE IT . THANKS
Thank you
Nice video, thanks. Another test might be to order 10 of each sensor to see the how consistent they are (across batches?).
That would be pretty awesome, now I need someone to send me 10. :)
Thanks. It makes things clear
Glad it helped!
Very good comparison. Thanks for this video. After reading some of the comments below I am going for the new BL Touch.
Right on! Thanks for watching!
Great video, and very imformative
Thanks and thanks for watching!
Excellent video, I had wondered about this given that the 3D Touch is around half the price of the BLTouch.
Thanks!
Its a 4th of the price actually
@@Eatmykebab It is? Where at?
@@ChrisRiley Aliexpress currently has it at half off
@@Eatmykebab Nice!
Thanks Chris.
Thanks for watching!
Thank you for explain that ~ may i know how about the original prusa that pinda prope?
The Prusa Pinda probe is awesome. It is very accurate.
Unfortunately Tom's sensor video is no longer available. Wanted to watch it. The trianglelab 3dtouch has been updated and looks more like the BL, having a plug instead of soldered connection. Not sure if the accuracy has improved or not. It's also $15 now instead of $25. If you have a really budget printer it would seem clear which one to go with imo. Thanks for the good video
Thanks for watching! I have updated the link to toms video and here is the link as well. th-cam.com/video/il9bNWn66BY/w-d-xo.html
Thanks for the video/review. I have both and connected both up to a printer (clone of a Prusa!) first with a glass bed, second time without. Then did some wierd things like actually made the bed seriously unlevel (slanted) by placing a 1.5mm bar under the print bed one side (gradual increase in Z hight with X) and then one corner (gradual increase in Z height for BOTH X and Y). After all the print tests All PLA @ 195'C to a 50'C bed. honestly didn't see a difference between them. Leave the bar there and perform manual bed levelling use feeler gauges (not a piece of paper!), with a digital and then an analogue depth gauge (both pretty accurate and used in CNC milling) and well within the margin of error of the BLtouch measurements you quoted to see what the differences really was. Nothing. Auto levelling was a bit faster once fitted but manual was just as good and if you don't move the printer about doesn't have to be redone often.
Great testing! Thanks for watching the video. I wonder if the clone sensors are getting better since I bought mine. I wouldn't mind giving these tests another try at some point with new sensors to see if anything has changed.
Chris thanks for the video and pragmatic view. I know the clones are clones and the BLTouch is the original (although not sure the concept is that original) and I have paid for one myself but given 99% of people are working with clone printers and not some original it is a tad hypocrytical of some trying to take the high ground about the BLtouch IMHO. That said some clearly have had a rough time with dodgey poor sensors but I bet they might have been really cheap so the caveat 'buyer beware' definitely rings true. If the clones were all that bad they would not be selling them and as you and lots of others have said they still work and at a tollerance level that is fine for home/hobby use. I honesty prefer manual levelling maybe I'm just a bit odd?
As asked... my previous clones were from Triangle Labs through Aliexpress. I just bought another from them £10.80 inc shipping to UK! It's in front of me now. Interestingly says "based on ANTClabs" on them, also it doesn't have solder on wires but a plug/socket and 80cm wire with board connections on other end so no more crimping etc
Not at all, if you have a nice sturdy machine, manual leveling is still the way to go. I personally like the inductive sensors a bit better, but not near as flexible as the BLtouch of course.
That's sounds like a great deal, no crimping is always a plus.
Hi Chris, just an update I bought the cheaper option which now comes with the extension cable and is fitted with a plug not soldered. So little to choose between them. Just my 2 cents worth. :-)
Cool, thanks for the update, I know a couple of things have changed including prices.
helpful video thank you
You bet! Thanks for watching!
Great video!
Thanks!
TY!
Hi Chris! thanks for the "ultimate" explanation.
I have a wanhao i3 plus, does a sensor (BL touch and correct installed) really improve the prints?
thanks!
Marco Vignotto Thanks for the comment. I wouldn't say it makes prints better, but it makes prints more consistent.
Chris Riley thanks for the reply! Do you mean that is also more precise?
Yes, by making your first layer more consistent it should improve precision.
Chris Riley thanks!
hello.
sorry for my english language.
Can you please tell me what happens in the black and white cord when the needle is raised and lowered?
if the needle is top contacts should be closed when the needle down the contakti be open! I measured with a mutimeter.
I measured my 3d touch sensor on resistance and shows 10 ohms all the time, even if the needle is up or down!
when I test the G-code M119 all the time, the needle is open
I use Arduino Mega!
Marlin 1.1.9.
I would try to switch the logic of the endstop. The Z min and Z min is endstop.
I have to say I have the 3D touch and I sometimes feel it is a little inconsistent. It otherwise works well enough most times.
I pretty much have the same thoughts. Thanks for the comment.
Chris please make a step by step tutorial on how to install 3d touch to Anet A8. How to wire, configure marlin, and measure offsets If possible! Thanks.
I would, but I no longer have an A8. I have an A2, I might be able to make it work on that.
Thanks for sharing
Thanks for watching!
Great basic video but you miss the main issue with this sensor, in particular the BL Touch. It has some heatshrink holding the hall effect sensor trigger (magnet) to the probe pin. This means when your hotend heats up the accuracy drops way off as the heatshrink starts to heat up and unevenly change shape. So depending on when you do the calibration and how hot the whole are is, it will massively effect the BL touch accuracy. By how much you ask, well it can be by more than 0.1mm which can be more than 1 layer height. This is why many people report that the accuracy on the BL touch is not good enough, especially if they run a calibration before or between prints as the sensor pin has effectively changed length. The electromagnet inside holding the pin up also suffers badly from heat, this means on a printer with an enclosure the pin can drop down during a print due to the increase heat and ruin prints and or course bend the BL touch pin. The standard deviation of the BL touch on a cold setup might not be much, but the accuracy is not very high (pretty much the worst on the market for Z probe sensors) and it gets worse the hotter it gets....
My standard deviation has not changed from cold to 250 degrees on the hot end. so I kinda call B.S. I have 3dtouch and bltouch on different printers.. You may have the bltouch too close to the hot end.. It should not be getting hot anyways
Thank you
You bet!
Hi!!, the 3dtouch and the bltouch conected and setting up equal in the marlin 1.1.8?, thanks!
Yes, they work exactly the same in Marlin.
thank you!, i hope the 3dtouch works on the tornado with gen L v1.0 board. :)
Good luck, I am not sure about that board, but I am sure you can make it work somehow.
for an update the 3d touch is a much better deal currently than the bl touch. the 3d touch is a third of the price on aliexpress
Thanks for the update, good to know.
The 3dtouch now has a plug on the back, and also comes with extension wires. At least mine did.
Good to know they have updated it.
Where did you buy yours from?
My eBay one did not :D Still works well compared to inductive sensor that varied in height according to temperature and mood, good £12 spent.
Hey. I *really* love your video, the only thing I think you could work on is the audio. Lots and lots of pop'ing, a bit wonky pickup, just.. uhm. Thats about it really. Subscribed :).
Magnus Johnsson Thanks for the sub, yes, I have struggled with audio. The newer videos might be a little better. Still trying to improve where I can.
Is the wireing and configuration the same??
Yes, they should be identical.
Well a friend just throw the 3dtouch to trash...
His repeatability test with it shows a deviation of nearly 0.3-0.4mm... which explained all the bad print he had. Plus it really don't like heat (he's working with abs and nylon with an enclosure).
Basically it works... As long as your bed is cold.
I have an old one, I am going to try and compare it again soon.
I think the 3D touch would probably be more accurate than the micro switch on a servo operated probe arm that many people used in the past.
I have never tested them side by side, but you could be right.
hy all, i have a bltouch on ramps 1.4, i have a isue that the right side of the bed is always lower as the left side, any explication?
Hey Mario, ABL is pretty bad at correcting for X skew. I would run a G29 from a terminal and look at the leveling map. Then make adjustments on your Z lead screws from there. If you need help, check out my auto bed leveling video.
Hello. Have you solve this ? Have the same problem. Thx
Still the same problem, i nee to adjust a little more the motor driver, i notice is a little low power, i use clone of clone ramps mega 😊
Love this. I really get sick of hearing people always dogging chinese clone stuff. Instead you took the time to show the differences and leave it upto each person. I actually own 2 bl touch and 2 3d touch. Bl touch's being on printers where accuracy is critical. 3d touch where not so critical. But love how you side by side comaired them.
Thanks David, to me it's really about what the community is using. These 3D touch sensors are around so why not show what they are all about.
I subbed because you got the same name!! 😀
Awesome! It's good to have another Chris on board!
More great info. Thanks Chris! The other consideration with these particular sensors is that the BLTouch is not open source. China's copyright laws are apparently MUCH more lenient than most other countries. This means that the knock off is a copyright violation and is taking money from the innovator of this great product. Of course, most people probably only care about their own costs vs. performance, not so much how their purchase decision impacts a particular company. However, in this instance, it wasn't even a company that created the BLTouch but a girl in Korea. Going to their website, www.antclabs.com, you see that this is not a huge corporation with hundreds of products. It's just a girl who invented something and is selling just that thing. As such, the more people who purchase the knock-off, the less the innovator is recognized and rewarded for her efforts and the less innovation we are likely to see in the future. (Stepping off of soapbox now)
I totally agree with you. Well said.
Thanks for sharing this info - I'm in the market for auto bed leveling, and while researching, ran into this. Knowing this woman's story, I'm happy to spend the extra $15 to support such an awesome innovator :)
@@smeggy22 Agreed, she has done a great job on this.
Great job Chris another fantastic video, I would like to however point out that the designer of the BL touch did all of the original design work necessary to produce a great product. When you knock off pocket product that’s great, Remember new innovation cannot be done when someone keeps stealing your products.
Thanks David, that is a very good point.
Bltouch is a patented product also. So I kinda wanna say buy the knock off just cause I prefer open source and think most patents are for greedy people.
Yeah, the BL Touch is based arround the Hall Effect, discovered by Edwin Hall in 1879. How much is she paying the scientist that made her product possible? That's why that argument is flawed.
BTW, got my 3D Touch from Triangle Labs, costed less than 12€ and came with crimped extension.
Actually, that's totally how innovation works. The moment you close it off from other great minds the technology stagnates and never matures. The only thing happening here is a little less money going into their R&D department. But this will now develop and mature much faster because it's becoming more accessible to a much larger crowd.
thanks
Thank you
Cool
Thanks!
I have one of these clones for a while now. I have installed it today, but it is really close to the bed. Which is fine, but the actual nosel from the extruder is about 8mm or so away from the bed. I know it should be level. Can anyone advice me where i might be going wrong?. I have a creality ender 3
Its a 3D TOUCH sensor Automatic BED Leveling Sensor BL AUTO touch sensor
Sounds like something is wrong with the offset. Run a M503, is there something listed under M851?
I have one of these clones for a while now. I have installed it today, but it is really close to the bed. Which is fine, but the actual nosel from the extruder is about 8mm or so away from the bed. I know it should be level. Can anyone advice me where i might be going wrong?. I have a creality ender 3
What is your Z offset set to? Check it in eeprom, you will see and M851 command. It might need to be updated.
@@ChrisRiley I manually lowered the hot end down, as far as it would go. The touch sensor makes contact, but the ht end is over cm away from the bed.No filament will make contact with the bed.
@@leeparsons70 I am confused I think, I might need a picture.
I dont think you can reply with a photo on here, can you?
@@ChrisRiley I dont think you can add a photo on here in a reply. I got the bracket when i bought a cable loom from ebay for the bltouch, and figured it went in the same position as the bltouch. Basically, the sensor, when attached with the bracket will hit the be, but the hot end on the extruder will be 8mm or so from the bed I thought they would need to be parallel to one another?
For the price difference, I would go bltouch. The clones are not significantly cheaper.
The are in Australia. BLTouch $65Aud, 3dTouch $25Aud
This was exactly what i was looking for. My printer is the Anet A8 its z axis is 0.04 per step i think so accuracy better than this is pointless.
Nice! Glad you found it helpful.
my BLTOUCH clone has a standard deviation of 0.06 but a range of 0.25. one or two out of my 25 probes is always off by a lot. so one point in my bed is always wrong >.<
EDIT: made my own. it has a range of 0.03 or less if I remember correctly and a deviation of 0.03. I made the mistake of making it in clear filament which messes with the accuracy a bit but like I mean I don't think it matters that much when it's that accurate :P
Doh! I have heard people saying recently there are a lot of really bad clones out there now.
@@ChrisRiley yes! but i'm so happy with the one I made myself. the accuracy is insane! even with the clear filament (which I later realized makes the results not as accurate) it has such a small range. 0.03 or less I think.
How about buildl quality ? Mine 3D Touch is not so good, the metal pin is too small comparing to the plastic case so it can wiggle.
Nuttavoot Chupanya Thanks for watching. The pin in the bl is smaller than the 3d, but the 3d does seem to have a little more play. I think if you took the probe speed down to maybe 180 mm/m you could get the 3d touch to be a little more accurate.
Do you mean "Z_PROBE_SPEED_FAST" ?
Nuttavoot Chupanya HOMING_FEEDRATE_Z (4*60) is where the speed is actually set. You can adjust it here to make it a little slower. Maybe 4*50 for a test.
Thanks for the advice. This does make a lot more accurate.
You are welcome, glad it worked.
there is a way to do even better than all these sensor the comparator system with gear ratio and more accurate yet
Nice! Do you have a link to more info?
@@ChrisRiley fr.aliexpress.com/item/32917255569.html?spm=a2g0o.detail.1000016.1.37e1b9bbMfCCy6&isOrigTitle=true
Good evening and just one can think. it's not just the one the
reward the original inventors is what I like. also Banggood only has a track record of 40% chance of getting the packages to me so there is that.
I totally agree with you. Sometimes ordering from the far east is somewhat questionable.
So I can only leave my thoughts below if I didn't like the video? But I did like the video.. But I'm commenting.. So did I really like it? Now I'm confused..
lol, I will take all thoughts good and bad.
Thanks for the info and video, but let me tell you. I just went through hell over the last few weeks with a bltouch upgrade. The problems all came dow to faulty knock offs from China. Bought the real BLtouch from a honest provider .... plugged it in and off we went. Ran like a charm. The small amount of money saved isn’t worth the aggravation. Never again. Most of all is the premiss of stealing technology and expecting the developer stay in business. This kind of crap has to stop. Thanks again ... you always have good info.
Thanks Robert! I don't disagree with you at all. Especially now a days, the prices are so close to each other and the quality on the knock offs keeps getting lower and lower.
3d touch is currently $11 on ali express
That is cheap!
Since then BL touch has gone to welded connection and 3D Touch to socket. All that while 3D goes with cables and screws for about 15 Euro. BL (Only BL) without cables or screws goes for 40 Euro.
The only positive thing about BL is that is using a plastic pin that doesn't rattle like the printer is falling apart every time you print. The 3D has a shitty aluminium floating pin design that vibrates like hell under printing and i have to run outside every now and again cause it sounds like an earthquake...
Funny you should say that, I had a failed print the other day and it snapped my plastic pin. $15 to replace it. DOH!
@@ChrisRiley Replaced mine with a lego light saber. Had to drill up the bore but it will never break...
@@thewalloby lol, that's awesome!
Statistically, you should estimate your plus/minus tolerance based on at least 2 standard deviations (95% of a normal distribution .. using only 1 srd dev as you did is only 68%). For comparing that tolerance to a 200um layer height, the full tolerance range using 2 std devs .. would be 4X the std dev values you measured. So you should be comparing 44um to 200um for the BL Touch ... and 127um to 200um for the 3D Touch .... now there is a clear winner and loser, right? In fact, the error range of the 3D Touch sensor could be as bad as the bed flatness error on a decent printer, rendering the 3D Touch useless.
Thanks for the info, I need to sit down and think about this for a moment.
i have servo...and it working..1$..haha
Great!
I will say that ethically you should not be buying the clones. The BLTouch is patented and the 3DTouch makers do not have permission to reproduce it. Technically, they are illegal copies.
That is a very good point.
Greg Nutt if the clone works, I go for what is cheaper...
I've ended up with a clone, after purchasing through eBay, thinking I'd bought a genuine - this video has given me peace of mind I've still got a useful part rather than a POS - had I realised it was non-genuine I'd have certainly had an OG unit though - the 3D print industry is driven by innovation and volunteers and when something like this comes along we should definitely get behind it
I didn't think about that. Good point!
Are you the NuttX Greg Nutt or no relation?
I don't like supporting companies that make 1:1 shitty clones of other products. That's not progress it is just plagiarism.
I hear ya.
Geetech bl touch is crap in Time ... reset and stop working randomly have 3 of them all have the issue i regret the original one no one complain on it ...
So the 3D touch wins
Now a days the price difference isn't as great as it use to be. The BLtouch is going to be more accurate.
@@ChrisRiley Of course, I bought 3 3dtouch a wile ago, and it's definetly life changing, I mostly print PETG on glass with dimafix with 0.2-0.4 first layer so maybe for others using other materials with tiny first layer and other surface will need this extra precision, but for me the 3d touch wins because of the price, but if you look deeply, the one's whos screw you the most are the 3dtouch seller, they just copy ^^ .
The price seems to have dropped a bit for the real BLtouch, and the clone is a cheap knockoff that violates the inventor's intellectual property rights. The choice should be a no brainer. BLtouch (Antclabs) supports their product well. I bought one and it's great. If there is a price difference at this point, the hassle and bad karma just aren't worth it.
Thanks for the comment, all good points. The BLtouch seems like a good product and does a nice job and if it's getting cheaper, even better.
3DTouch is an illegal copy of ANTCLABS BLTouch. I think I paid 30 bucks for the real deal on Amazon. To each their own as far as purchasing one or the other. When a product is Open Source I have no qualms purchasing a copy like the BMG extruder but the 3DTouch is an outright illegal copy.
I hear ya Bill and now that the BLTouch is more affordable, there is really no point in the copies.