atx power supply and motor alternatives
August 16, 2010 at 9:54 am #2350
i found this pdf’s from hobby cnc
the reason i want to use the atx power supply, is its simple and i only want to by board from them, the motors are available to me and they dont offer a board powersupply combo, and you have to have motors.
And does 300 oz in are mandatory ? How low can i get on power of these motors. for the time of post i have access to 10kg/cm motors.(about 150 oz/inch)
thanks in advanceAugust 16, 2010 at 5:25 pm #3682
karandex, thanks for the info. Just to be clear, HobbyCNC does offer a board-only option that works with a variety of non-HobbyCNC motors. You could also use the HobbyCNC EZ board instead of the Pro Chopper, though this would limit your ability to add 4th-axis operations in the future.
The 300oz motors we specify are definitely not mandatory; in fact we are realizing that they are probably overkill for a smaller gantry like that on the DIYLILCNC. The motors you list should probably work just fine, you may just need to be a bit more conservative with acceleration.August 16, 2010 at 6:11 pm #3683
thank you for reply
that will decrease my cnc cost a LOT. i am planing on using atx as of link. Would it be ok? how many watt atx i will need. I know it will be cheaper if i make powersupply ground up but wil ATX i get a case and fan system which is already tested and safe.
One more thing comes to my mind if i get lower torque motor then i think that using threaded rod instead of acme rod will be better as they have lower pitch then acme rod and will provide more torque in linear direction . Whats ur sayAugust 17, 2010 at 4:23 pm #3684
@karandex, I’m not sure what the wattage requirements for the HobbyCNC board are, but I’m sure you could figure it out based one the transformer specs.
You are right that threaded rod or acme screws would increase the torque quite a bit. We tested an early version of the Z-axis using threaded rod and found that it wore down pretty quickly. Acme rod is more expensive, but it stands up to the friction much better.
Here’s another drive solution that might be cheaper than acme rods, yet more durable than threaded rod.August 17, 2010 at 7:12 pm #3685
so is it ok to use an computer ATX power supply instead of build from scratch as shown in link ?August 17, 2010 at 10:46 pm #3686
Looks like you’ll have to figure this out on your own. We can give you ideas or point you in the right direction, but this is ultimately a DIY project. Good luck!August 18, 2010 at 5:46 am #3687
at least can u tell how many volts i need ?
can i use mech3 as software ?August 18, 2010 at 2:09 pm #3688
We didn’t design the HobbyCNC kit, so Dave Rigotti is really the person to answer this question. There probably isn’t a binary answer (will/won’t work), but rather a question of how well the alternative will function.
Mach3 should work.January 15, 2012 at 8:27 pm #3689
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