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…Continue
"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!"
"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."
"If you use geared steppers there will be some backlash. The ordinary geared steppers seem to vary in their backlash quite a lot, and I found them unacceptable. The high precision ones are made much better, and their backlash is much…"
"I hope that system could be usable. One thing is motors backlash. 30:1 gears has Backlash at No-load: <=25 arcmin - which would mean 7 hole steps! With this accuraty bigger gear would be pointles? And is there any use of microstepping? Are…"
"This is all sounding pretty good. Just make it as accurately as possible.
For the stepper motors, I have found that the slower gearboxes, 30:1 and up are what is needed to slow things down. When you think about it the pan and tilt will not be…"
"I think that I will go for one thrust bearing and put pillow bearing as top part (maybe this). Then I have bearings for both surfaces (vertical & horisontal). 10 mm rod should be steady enought. The thrust bearings width is 3 cm witch will be…"
"I think this is where your thrust bearing comes in, although it would not be necessary if you use similar bearings to mine, which are wide and stable. You want to avoid friction, or you get 'stick-tion' where something does not move when…"
"Pan bearing can be weak point. I have to tight the shaft so that pan axis is steady, but same time there will be more pressure for bearings. Propably pressure will cause more friction. That + shafts friction will make connection a bit stiff I…"
"Your design looks OK. The weak point is the pan bearing, which has to hold everything. So you need to make that good and strong. I don't think your system will work out much smaller or lighter than mine.
Smaller bearings for the tilt will be…"
"Thank you Simon. Your system looks really solid!
I am trying to keep my head small and movable. I was thinking to put 2 trust bearings to midle 10mm shaft. One below the fork and one to top of it. Inner forks bearings would be basic 8mm/22mm ball…"
"This moco rig setup has been used quite a few times, and once it is set up with minimum backlash, it does work well. The minimoco I made does not have a jib arm, and I think this limits its versatility, so I would recommend making a jib arm if…"
"And a few more, showing that the whole camera mount can be adapted from commercially available brackets and sliding mounts. It's really important that you can adjust the position of your camera and the focus motor, hence the use of the…"
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:…See More
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