EP5 - CNC3018 Rebuild - Precision Homing Sensors
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- เผยแพร่เมื่อ 25 มี.ค. 2024
- I this episode I will show you how I made my own precision homing sensors for my CNC3018. Hope you enjoy!
This is the fifth episode in a series where I upgrade my cheap 3018 CNC in an effort to improve its precision, performance and work area size. - วิทยาศาสตร์และเทคโนโลยี
Thanks for sharing this project and your process. I enjoy seeing the transformation a basic tool can go through with a bit of effort and love.
Glad you liked it, and thanks for taking the time to leave a comment!
I could never understand why your channel doesn't have more viewers the projects are very interesting and in depth and very well presented. There are other channels on similar subject matter that just do nothing more that like crappy mailbags each week and have thousands of subscribers and views. Anyway fabulous as always the most over engineered 3018 on YT reminds me of the totally over engineered but equally brilliant UV light box haha love.it keep up the good work!!
Well thanks Andy, always nice to see a comment from yourself. Actually, after a few years in, I am already resigned to the fact I will only have a handful of real viewers. Though it's dissapointing in some ways that possibly useful content will rarely get to those who could make use of it, I also know that if the channel got really popular then I might become a slave to the machine, and lose contact with my audience, just like so many other channels do. So, I will just keep puttering along, doing my own thing, and if it manages to make it to a handful of people who are interested to watch, then that will have to be good enough. Stay tuned by the way, I am hoping some of the up coming videos in this series should be pretty interesting. And if all goes well, I hope to move to the next level with my DIY PCB making.
great video!! keep them coming :)
Thanks! Got a few more already lined up in the pipeline, there should be a couple of interesting ones in there I hope!
It is popular with me! I like this series.
I can't wait to see how it will perform.
You must be one of the golden 50, so welcome! In response to your comment, I will definitely add a sequence testing the sensor performance in an upcoming video. I am pretty confident it will be good, but I may also fall on my face, so stay tuned!
Interesting; thanks
Wow, I have not seen a comment from Regal Heroes in a while, thanks! 😎
I did something vaguely similar, but in mine the spring holds two contacts closed and the cnc pushes them apart. This achieves two things. First because the contacts are always closed, they never suffer from dirt ingress, and second if for whatever reason the system doesn't stop the stepper, nothing gets damaged. And of course since the body of the sliding contact touches the frame, there is just a single wire from the moving contact back to the control board.
It would be interesting to see your solution. Actually, I was also a concerned about the dirt affecting the precision, but my hope is using the pointy edge on the flat surface will push dirt out of the way. Enclosing the back end of the sensor is also an attempt to reduce dirt ingress. As for avoiding crashing into the sensor, originally I thought have a good amount of play in the spring, might reduce the risk, but in reality on all axis the moving part will be stopped by the frame before the spring is fully compressed, so there is no risk of damaging the sensor. And same as what you did, just the single wire back to the controller for each on the axis. Thanks very much for the comment!
Your intro cracked me up! 😂 I haven’t finished watching yet, but I’m curious to see your homing solution, I used high quality Omron micro switches to resolve the same issues you found.
Well, I guess it's either a comedy🤣 or a tragedy😭, so having a chuckle could be appropriate. I guess time will tell!
@@ForOurGoodyour solution is quite ingenious. I’m curious as to why you didn’t just use soft limits for the end travel and keep limit switches just for homing? Most controllers can’t tell the difference between the 2 switch positions.
@@Cybernetic_Systems So when I first built my CNC 3018 I had no idea what I was doing, so I just added the switches to the extents like I saw other people doing. Actually the controller that came with the cheap CNC3018 had separate connectors for each extent, which only adds to the confusion, the reality is they are just connected together inside, and actually only 1 connection for each axis (as you quite rightly pointed out). After homing, the reality is the soft limits should mean the extent sensors are never used. So the reason I added the extent limits sensors this time, was probably initially out of habit, but there is a practical purpose too. In the case I leave the CNC running unattended, and then I get a crash, it is likely I will lose steps enough that the CNC will then fly off and crash continually into the extents, but having the hard limit will allow for detection of the abnormal state, and shut the CNC down. Sounds like an excuse? Well sort of yes and sort of no. Good question however 👍
@@ForOurGood that's a perfectly valid reason - I personally found that they caused me more trouble than they were worth.... But maybe that's my Fault 😆