The way I move around my fairly heavy DIY CNC

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Re: The way I move around my fairly heavy DIY CNC

Postby eabrust » Tue Mar 02, 2021 12:41 am

I just noticed that the videos worked on my cell phone ( w/ Firefox ).

Went back to the PC, and Firefox doesn't show the videos, but Chrome Does. Seems to be something related to browser maybe? I'm typically a Firefox user

Here is Chrome on left, Firefox on right:

forum videos.PNG


regards
Eric
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Re: The way I move around my fairly heavy DIY CNC

Postby ger21 » Tue Mar 02, 2021 1:33 am

Also a firefox user
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Re: The way I move around my fairly heavy DIY CNC

Postby spillage » Tue Mar 02, 2021 2:37 am

It’s looking like this is all over the place.

I’ve had mixed results... sometimes it works with a given device/browser combo, but others it doesn’t.
Right now it is working from both a Win10 laptop and a Win10 minipc via IE, Edge, and FF.
It’s not working on an iPhone7 via Safari, or FF.
It is working on a Galaxy Tab-E via its internet browser, but not via FF.

I don’t know if this helps or muddies the water.
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Re: The way I move around my fairly heavy DIY CNC

Postby Battwell » Tue Mar 02, 2021 1:12 pm

i can still see the 3 videos on my pc running chrome browser and on my iphone is ok too.
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Re: The way I move around my fairly heavy DIY CNC

Postby A_Camera » Tue Mar 02, 2021 6:13 pm

Battwell wrote:i can still see the 3 videos on my pc running chrome browser and on my iphone is ok too.

This is indeed very weird. Using the same PC with the same Firefox, it was visible for a day and then it was gone, but now it is back again, visible like you say. Not tried with a different browser, and in fact not even with my phone, but I am using the same PC and the same Firefox on several forums, and this behaviour is only observed here, so it is very strange.
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Re: The way I move around my fairly heavy DIY CNC

Postby A_Camera » Sat May 28, 2022 8:38 pm

Monport wrote:I have upgrade my K40 - Cohesion3D LaserBoard + Lightburn, looks good

Ok but what does it have to do with my thread?
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Re: The way I move around my fairly heavy DIY CNC

Postby Siirifon » Thu Apr 20, 2023 3:46 pm

A_Camera wrote:Hello everyone, and I hope you are all doing well during these hard times.

This is a long thread about my latest, fairly small project, which some of you might have seen already elsewhere, but I thought I will show it here also. I will start with a bit of a history...

My machine is nowhere near as nice or heavy as many others have built, but I don't feel I have to be ashamed of it, I built it completely on my own, cut and drilled, threaded almost every bit of it by myself, so all in all, I am pretty proud of it. Especially since I am an "office rat" engineer since the last 30-ish years. At work I never have to use any other machine than a computer, and even that only through the keyboard. Never the less, I miss my first 15 years of working life, not only because I was MUCH younger, but also because I do like to use my hands and brains in many ways, so at home and as a hobby, I take every opportunity to get my hands "dirty", do some practical engineering and so on...

So, to cut the story short, I built this CNC, driven of course with CNC drive products, initially only with a UC300USB and Mach3, but since several years with UCCNC plus UC300ETH. OK, to be honest, really initially I used parallel port and Mach3, but that was a hundred years ago... and I quickly realized that it was not the future. This is how my CNC looked like just a few weeks ago.

Image

I built this a few years ago, and use it mainly for plastics and PCB, but also mill some aluminium on it, so for my needs the machine is definitely good enough. From the start I kept track of the weight, but as time went by, the machine got heavier and heavier after all the modifications I constantly made. I knew it was heavier than 100kg, but not more exactly. The other day I managed to check it more precisely by placing two ordinary bathroom scales under it, just for fun. One showed 60kg, the other showed 67kg, so now I know that the total weight was 127kg, which explains why it was more and more difficult to move it around. I noticed this "problem" some months ago when I moved to another, much larger room in my house. This was the way I had to do it:

Image

I had to lower the round black feet on all four corners to lift the machine, remove the wooden blocks the machine normally was resting on, raising the black plastic feet to lower the machine on the four castors, move it to the new place, lift it again, place the wooden blocks under it and lower the machine on those. It was a complicated, back breaking operation, which actually put me off from doing any improvements and modifications. So I decided to do something about it.

What I did was I ordered four linear actuators, installed castors on them and installed on the four profiles acting as CNC feet. This is a short video about that activity

[youtube]https://youtu.be/4sUEEOjzpeg[/youtube]

Each linear actuator can lift 152kg, so I knew I had good margin. The only thing I am not that happy about is that they extend to three different lengths, only two are the same, but in this application that is not critical, all extend by about 50mm which was what I needed.

I made a simple, but over-engineered, control box with some relays, a switch and three LEDs to control the actuators.

Image

Even that part is documented in a video.

[youtube]https://youtu.be/aB5bX-nn4K4[/youtube]

The control box itself is of course been engraved on my CNC. I am not extremely proud about the looks of it, but this wast the first time I made this sort of engravment, so maybe the results are excusable.

Image

This project is finished. Now it is easy to move my machine around, just flipping a switch and that lifts the machine with the wooden blocks permanently attached under it's feet. No more crawling on floor for a simple move. Yesterday I swapped out the PSU to a more powerful one and released the last part of my video series about it.

[youtube]https://youtu.be/p-EtlIY0Zb8[/youtube]

Image

The new PSU was necessary because the current use was too high for the 7A PSU I initially chose to use. I was not sure about how much current is needed, and was a bit naive, thought that since my CNC is far below of the maximum load, I would need far less than the maximum current, but that seems to be the case only for "normal" operation, which is starting from zero load, i.e. when the linear actuators are fully up and the castors are dangling. From there I could drive the actuators to full extension, but if I stopped before, I could not restart. When the CNC was resting on the castors I could not restart to push the CNC further up, because the load to start from that position was just too much for the 7A PSU so the PSU just stalled, no movement. In that situation I had to lower the machine completely and restart from there. This I though was not very safe. Imagine if my toe gets caught under one of the CNC feet and there is no way to change direction, meaning I have to lower the CNC fully on my toe before lifting it up again... not good for my future... so I changed to the 82A 12V PSU I have and with that it can be stopped, restarted or instantly swap direction any time I want to.

Anyway, I am now ready, it works well and no regrets, would do it again if I had to. Yes, it is over-engineered, but it was fun and I really like this solution to a fairly simple problem. It's really cool in my opinion and hope it inspired a few people, so thumbs up for me. ;)

Image

Edit: I don't understand why the YouTube links are not working in this thread. Strange... :o


Congratulations on completing your project to install linear actuators with castors on your DIY CNC machine :D ! It seems like a great improvement that will make moving the machine around much easier. The project is well-documented in your videos, and it's clear that you put a lot of effort and care into designing and implementing the solution. It's also good that you upgraded to a more powerful PSU to ensure safe and reliable operation.

8-) 8-) 8-)
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