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@executivul Thanks makes sense and I just started to read simular explaination in other places, but yours helped.
How about rpm ? Is it generally considered that higher RPM is better, or at least not being limited by a low speed ? I've seen 1 300w spindle rated at 60,000rpm would this be better than a higher power slower spindle ?
@neverdie so to get the max rated RPM out of a dc motor you need to operate at its max rated voltage ? with no PWM ?
Running a DC motor rated at say 12-60V with PWM at only 12V would never get to top speed ?
Am I understanding correctly ? Thanks for the link
@neverdie :) Now I'm even more confused with this difference between brushed and brushless...
@neverdie Thanks thats what I thought, but I'm confused about the voltage range of some of the spindles. They use variable DC voltage to regulate speed ? I don't thinks so, they use PWM at any voltage I provide it with, no ?
So the V range specified on DC spindle is just what it can be driven at, and its the PWM which actually controls the speed ? Is this right ?
Thanks
@coddingtonbear What materials are you milling ?
I want to get a spindle for mostly wood, just hobby, but don't want to go too cheap, and face buying over when I realize its just not > W
I'm also looking for a good spindle so thanks for the links and comments.
Thought I'd share this link text. Its the 30A High Power Single way H-bridge DC Motor Driver Module. That "Frank From Germany" found and is using as part of his tool changing, along with a current sensor so he can brake, reverse and control speed on his tool changer, via arduino, to make it all work.
@bjornhallberg Thanks for the info, I got a bit frustrated trying to find this on the rawcnc website... i was in some loop, very frustrating.
I'm going to learn with the mpcnc and then posisble upgrade if I can justify it, or feel more flush. But thanks for the info...
This shipping costs, can be a big factor, so I do understand, but the openness and transparency or generally communicating well, which you don't get at all from most china suppliers, and some closer is just as important.
@bjornhallberg Any estimate on the cost of mechanical parts ?
feeding too much solder into the joint before you've heated up both sides, and melting the solder on the iron instead of the pins or board before those parts are hot enough.
@neverdie I'm gathering parts to make the same 3d printer with the carbon rods. I understood the weight reduction on the moving parts with carbon rods was the reason to go for them. And with the light 3d printer head that model can print much faster because of the stability and lightness. Which perhaps dosn't apply for the 2418 cnc ?
@neverdie you mean the tool changer, yes he has a blog and git pages where he shares. Its neccessary to speed control with current limiting breaking the spindle, which he's done via cheap ebay motor controller and arduino. Same goes for the spindle locking mechanism powered by a servo. and the CNC software..
Heres the git link text
Heres the blog link text
Its not step by step, perhaps he'll get their but I know he'll be happy if people copy, or chime in :), or add
@neverdie I saw this stepcraft automatic tool changer, its nice, but the design aproach of Franks is really novel, and way cheapper, simple ingenious. But my skill level is much lower, so I could be wrong :)
@scalz Agreed... the P&P is beyond my knowledge level, but what I found fascinating in what and how he was doing the project to make something himself, how he evolved the project was very interesting.
He's got something similar for a tool changer on a 3d printer which is very nicely designed... along with the software and controllers.
Perhaps slightly off topic but I wanted to share very interesting youtube channel of FRANK from Germany link text who's been working on a PCB pick and place module along with a CNC tool changer in the video above.
Very inginious, and clever work if you've not come accross his videos and work yet.!
I updated a few things, perhaps not all working properly yet, but have put a git page up at https://github.com/dudman8/MysensorsPairNodeLocal
Added registering multiply pairings, flashing led to indicate if nodes are in pairing mode etc. Still needs some work though, any feed back :) welcome.
Id like to add some messaging so controller could query the nodes and how they are connected, and configure them also from the controller, but don't know yet how to to this with templates and custom buttons etc in mycontroller.
@user2684 Thanks, I've implemented something myself with changes to the library, just playing around to understand it better. But will look at the SensorSonoff you mention.
Thanks again, its a great library.
Had a quick look at 1.7 dev branch :) is this ready for using already, testing or trying, or have you got more to do before its refactored etc ? I was interested in looking what the changes in architecture were.
@neverdie Generally I get the feeling from reading other peoples experience that its a mistake to quickly make the machine too big because of rigidity. But people do make mods to address this issue or to add heavier spindles.
Heres one mod i/d like to do link text
But to change the size just need to get new pipes which even if you use SS they are they cheapest part.