My pick-n-place effort made first movement today... But RS-485 line is poor, so running too slow to hook up the Y-axis.
https://photos.app.goo.gl/XpuJ1ZHWJCrZmJ179
bonifartius 𒂼𒄄
@niclas is this hobby or work?
@bonifartius Hobby. Want to make a PnP for my small scale business, but if it doesn't work out, it doesn't matter. Want to do something mechanical in my life (first time).
@niclas that looks like a fine workshop you've got there! :)
i'd really like to do something mechanical too, but i really haven't got enough time for that :/
@bonifartius And this started almost a year ago... Slow progress, when nothing else is required. See https://github.com/niclash/DreamPlacer
@niclas that looks impressive!
@niclas what do you use as controller for the servos?
@bonifartius I bought Servos with matching controller/driver from Lichuan; https://www.aliexpress.com/item/1005001502003677.html?spm=5261.ProductManageOnline.0.0.43a14edfpjzIjT
But got quite a neat discount... Think it was ~850 for 3 incl shipping.
@niclas those are a bit more beefy than what i need for the things i have in mind, but i definitively would want one with a controller which can be connected to in a sane way.
@bonifartius Typically, just look for servo and driver bundled. If you are down to small-ish stepper motors, then you can start looking at controller boards (I have a Duet2 to use for the 2 Z-axes, the 2 C-axes rotations and vacuum valve).
@niclas what would you recommend for handeling something which doesn't have to be overly precise? i feel that stepper servos might be the easiest way, but it feels weird using them for something where precision isn't required..
@bonifartius The more important question is "How much torque at each RPM?", i.e. a rough curve. Torque requirement is hard to calculate, especially as speed goes up and various metal parts start rotating. You have choice of open-loop steppers, closed-loop steppers, closed-loop servos if you need position. You should perhaps also consider BLDC motors. What is the application?
@niclas thinking about automatizing a green house, moving windows and such.. i probably can buy premade stuff for that, but that usually is more expensive and shitty to control yourself as everybody wants to sell complete solutions :)
so probably much torque, few rpm? guess a dc motor with end switches would suffice, but in the end that may be more complicated to control than a servo with controller.
@bonifartius Just go with small normal DC motors and a "worm drive" gear to slow it down. Two relays and two end switches and a arduino to control it.
Something like this;
https://www.aliexpress.com/item/32701497348.html?spm=a2g0o.productlist.0.0.75fb5ddeC27uec&algo_pvid=57c351aa-2f1c-45ce-9445-f9e62d7e6cf2&algo_exp_id=57c351aa-2f1c-45ce-9445-f9e62d7e6cf2-27&pdp_ext_f=%7B%22sku_id%22%3A%2265683234263%22%7D