Re: Building my first CNC - final questions
1000x1000? How much will the gantry weigh? What speed do you want to move at? These questions are more important at the beginning than what software/controller/stepper voltage will be used.
I would bet that such a large machine will need you to increase the motor size to accommodate the inertial of the gantry and head.
Just my $0.02
Re: Building my first CNC - final questions
Quote:
Originally Posted by
nejc1337
Thanks, guys!
@ger21, 1st answer: Ok, I understand that. But nothing "bad" can happen if I use 36 V instead of 62 V, right? And, if I understand correctly, it is then best to look for motors with lower inductance to efficiently use lower voltage?
@ger21, 2nd answer: Okay, but from what I saw, even the cheapest controllers for use with UCCNC are a lot more expensive than some cheap Mach3 breakoutboards. I could use my old PC and connect everything through parallel port and use Mach3. I plan to use the CNC for hobby purposes mostly, so I can't afford to buy controllers for 200 $ or so.
Do you see any problem in using this combination for my CNC:
BOARD:
https://www.aliexpress.com/item/3233...chweb201603_52
DRIVERS:
https://www.ebay.com/itm/Digital-DM5...AAAOSw~CVdExKj
MOTORS:
https://www.ebay.com/itm/EU-Free-Shi...oAAOSwBmhdchUr
I'm using one of these type boards as Ger mentioned earlier. £5 ebay special.
https://www.ebay.co.uk/itm/USB-Inter...oAAOSwufFcg3w1
Using Mach3 on P Port
An old Dell with WinXP service pack 3.
The damn thing is faultless. (well unless I program the G-code stupidly :D)
I'd like to eventually go to a UC400eth but don't really need to tbf.
Re: Building my first CNC - final questions
What do you think about these motors with 1,8 mH: 57CM23 version: https://www.aliexpress.com/item/3299...chweb201603_52
And pair them with DM542T drivers, should it be okay?
And also, how do I know how powerful (Watts) power supply I need (I would buy 48 V power supply)?
Thanks.
EDIT: I didn't even see the last 2 answers.
Thank you, @dazp1976, I will probably just buy this one. :)
@maxspongebob, I must admit, I haven't really thought about this. So you think these kind of motors would not be enough? The router itself will be built from MDF and in the size of 1000x1000mm.
Re: Building my first CNC - final questions
How are you deiving it? Screws?
Re: Building my first CNC - final questions
Yes, SFU1605 ballscrews (5 mm pitch) and SBR20 linear rails.
Re: Building my first CNC - final questions
Then you definitely want the lowest inductance, and highest possible voltage.
Re: Building my first CNC - final questions
It's probably a good idea to do some of the math that will define the limit of motion of the machine before you shell out the $ for parts.
For instance, with a 1605 ballscrew, you are probably looking at a limit of 1000 RPM on the screw. My experience is that you can drive a long screw faster, but a cheap screw will probably start to flap at higher speed. So, that puts you at around 12 seconds to get from one end of the table to the other. If you want to go faster, you could use a 1610 screw, but the torque requirement would double.
Re: Building my first CNC - final questions
I get it, thanks. I don't have any clue of what the torque should be because it's my firat time doing this. It's important to point out that most of the work will be done on a smaller scale, say 400x400mm so I think I shouldn't care so much for the slow speeds from one end to another.
Also, can anyone please reply to this question from before:
What do you think about these motors with 1,8 mH: 57CM23 version: https://www.aliexpress.com/item/3299...chweb201603_52
And pair them with DM542T drivers, should it be okay?
And also, how do I know how powerful (Watts) power supply I need (I would buy 48 V power supply)?
Thanks.
Re: Building my first CNC - final questions
Re: Building my first CNC - final questions
Exciting....enjoy the build:)
Re: Building my first CNC - final questions
Thank you! And thanks to everyone who helped. :)
Re: Building my first CNC - final questions
I still need some help. :)
So, this is what I have:
- 48 V power supply
- 4 of these: https://www.ebay.com/itm/264045184820
- 6 limit switches: https://www.ebay.com/itm/10x-KW12-3-...UAAOSwA3xcNeRi
- and probably something like this: https://www.ebay.com/itm/AC110-220V-....c100005.m1851
What breakout board/controller do I need with these? I would like to incorporate everything from above, including limit switches and spindle. I suppose something like this won't work: https://www.ebay.com/itm/1pcs-5-Axis...kAAOxyBjBTWMPR
?
Thanks a lot, guys!