That’s a damned huge bearing! Cost three times in postage what it was worth! ($4 bearing, $10 postage from china! So I got 3 for myself and friends.)
Building one of @BQ111 Ciclops 3d scanners as it’s an easy to get and solid looking design that can be adapted to work with most other 3d scanning software., because I can’t find anywhere that sells just the ‘Scan Shield’ I’m building it based around a CNC Shield with a few added FETs just in case. Right now I’m doing some repairs to my printer to let me print the larger parts.
@Bjorn_Marl that is the one that is specified, is the one that fits and it’s cheap to get. Plus being a deep-groove bearing, it handles enough thrust load to keep the weight off the motor’s bearings and give it a ‘no wobble’ turn. I suspect the plastic mounts that go on this will fail long before the bearing has problems.
This is the scanner: https://www.thingiverse.com/thing:740357 Others have made 3d printable replacement bearings: https://www.thingiverse.com/thing:650155
Price wise i can see it, axial bearings are not as easy to come by and cheap as radial usually. I still think it is a pretty massive part to use for the purpose
@Bjorn_Marl I know! I thought it wasn’t going to be this big when I started this build, was surprised when the base printed and a little shocked at the weight of the bearing when it arrived! But it turns very nicely even with a lot of thrust weight on it.
Couldn’t see your comment on Steve Wood’s post. I also originally thought this was odd until I found the lasers are only 5mW so only drawing a fraction of what the arduino pins can deliver. By the way what CNC board is that? Way less bulky than a CNC v3 shield.
Very nice board, too bad I’ve already got the V3 shield! I’ll risk driving the lasers directly (arduino can deliver 40mA or 200mW @ 5V so I think it’s quite safe).
And as an example of spam… And because I know it’s not just me… @Jose_Luis_V and @Alberto_Valero_Gomez BOTH your comments where marked as spam! I had to view the full post(Click the link with the date/time), then there was a ‘comments marked as spam’.)
Even though it contained very relevant links! I allready have motor, driver ICs , webcam, Arduino and most other bits leftover from other projects… I just needed the shield, bearing and laser. But it’s handy for others!
@Electra_Flarefire Agreed, for such low currents even a cheap darlington pair would be sufficient (eg TIP120/122). My mistake though, my 5mW lasers draw 20-25mA, but still well within limits.
@Chengster_N I suspect my lasers will be the same. I’d just rather distroy a FET than the micro. I’m using some 5c(China!) BS170 N-Fets. I am going to add a 10k resistor bewteen gate and GND to protect against static, but I feel like being paranoid.
Hi @Electra_Flarefire , I am sorry but I don’t see your comments and I certainly did not mark them as spam. I am on android atm though. The lasers are driven directly from the shield pins.
@Steve_Wood_Gyrobot The comments are there and I can even provide a screenshot, I didn’t think you marked them as spam.
It’s mostly a ‘be aware google is doing this as if your bitten it’s impossible to tell if someone just hasn’t responded or if it’s been marked as spam without [knowing how to and] checking’.
And thank you, based on your and other’s proof, It seems that these diodes when correctly working are well under the AVR’s current limits.
Oh. I’ll also be trying some of your printable
bushings when I catch up on a back-log of printing and set the machine up for Delrin.
Grrr! There. Unmarked as spam.
And @Alberto_Valero_Gomez , google marked one of my comments on your poseable dragon post as spam. This is infuriating!
EDIT: It refuses to let me unmark. It /SAYS/ ‘restored’ but a refresh of the page and it’s back to how it was! Grr!
As per their comments:
You can buy All the electronics/parts at http://store.bq.com.
Check here http://store.bq.com/en/kit-electronica-ciclop
why use such a giant bearing? use 3-4 wheels under the turntable. ( how precise can such a cheap bearing be I wonder, doesn’t even pay the steel its made of…)
