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Bearings for moco camera head
Hello wise board of SMA!
I am planing to make simple moco unit with Arduino system. I got great help from previous post about the subject and from Simon Tytherleighs comments.Things have developped plesant ways since last time I looked to this subject. Seems that it is possible to do system with ~400€!
One thing what puzzles me is bearings of pan and tilt head. I am planning to make U shaped one.
Have you used some axial ball bearing for Pan? Maybe something like this:
https://www.vxb.com/ProductDetails.asp?ProductCode=Kit7852
Or do you have it without any bearings, just wax or something?
How about Tilt?
Thank you,
-Tatu
Views: 208
Replies to This Discussion
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Permalink Reply by Tatu P on
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Thank you Simon for all good info! I really appreciate it. It is long process to figure all things out from scratch. I think that I am ready to order the parts now.
I will post some results when i get so far.
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Permalink Reply by Simon Tytherleigh on
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Glad to be of help. Good luck! It is quite a challenge, but very satisfying once you get it going. Expect to have to modify things a little to improve them as you go. I look forward to seeing your progress. Go Tatu!
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I got my moco running!
The rail is Neewer and was supprisingly good for 60£. For board I got Mega 2560 with RAMPS 1.4 Controller with 5 A4988 Stepper Motor Drivers. I had to adjust the DFmoco code a bit to get it work with Ramps 1.4. But now it works. + I managed to add small led control to it for practical lights.
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Looks great. You could consider using a Fotomate sliding mount for the camera. Also, my sense is that the base should be as wide as possible for stability, but I know the commercial units limit this.
Well done! Now for the tests. Try repeating a move, then putting it into something like after effects and overlaying the footage to see if it lines up. This is a test of backlash and accurate bearings.
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Looks great. You could consider using a Fotomate sliding mount for the camera. Also, my sense is that the base should be as wide as possible for stability, but I know the commercial units limit this.
Well done! Now for the tests. Try repeating a move, then putting it into something like after effects and overlaying the footage to see if it lines up. This is a test of backlash and accurate bearings.
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Here is small update about the project. Soon I have to start animate!
There is some shots about camera rig:
Camera rigMain reason for making stepper motor system was lighting. 1/2 of my film is located by fire. So I wanted to make that easy as possible. For that I needed two of cell carousels. Camera rig was something extra on top of that.
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Nice work, Tatu. It is very satisfying getting these steppers to do some hard work for you! Did you see Edu Puertas YouTube video?
https://m.youtube.com/watch?v=tXef1zVm2Xg
Your results are looking good. Fire seems very hard to get right.
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Yep! Edu Puertas has good easy style wit cable ties and all.
I have modified DFmoco code for RAMPS 1.4 shield. So if someone needs that code, feel free to contact me. Figuring out pins was time consuming. And I managed to burn one set of Arduino and shield, because I did not remove D1 diode from RAMPS 1.4. But now everything works - at least for now.
-Tatu
pohjavirta.art
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This is interesting. Why did you decide to use the RAMPS shield? I just used a Mega 2560 and connected it directly to black box drivers. I did find the jumper wires rather feeble and wobbly, but mostly they work ok. Does the shield mean you can connect more positively?
If you have a picture of your Arduino set up that would be great to see.
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Shield seemed to be easy solution with less connections. And 40 € for Mega, Ramps + 5 drivers, seemed to be bargain. I put stuff to case of old tv-digibox. There is allso power source and small sircuit board for better stepper cable connection.
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Thanks. That looks good. I have used an old PC case to enclose mine. There just isn't a neat way to do the wiring!
I have used 4 pin aviation sockets and plugs for my connections to the steppers, so I can unplug the unit easily. But the costs soon grow, and you have to solder them well.
Not sure if I will go towards using a shield for my next rig, as it needs 6 axes, and I have 3 extra black box drivers already. But if you are happy to share the code, it might be worth posting here for someone to find.
My next rig will be a small jib arm one, so it can move freely in all dimensions. I think the big rig will only get used for epic landscape shots!!
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