My DIY CNC milling machine project - the 400w 40v power module + stepper

General CNC CNC Routers
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My DIY CNC milling machine project - the 400w 40v power module + stepper motors arrived today.
Next I’ll do a test setup and start testing firmware settings…

b5b8dc053bc7ab5f97d93532eaa35396.jpeg
b5b8dc053bc7ab5f97d93532eaa35396.jpeg4032×3024 3.54 MB

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Oi, Gostaria de saber qual a amperagem (A) deste módulo de força, e também onde você comprou e o preço? Obrigado querido…à propósito qual a origem do seu nome “Amundsen”? Mais uma vez obrigado…

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Power tested - all finemissing/deleted image from Google+

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The Cohesion3D loaded with the smoothie CNC firmware.
Now I have to do a test setup with drivers/motors…missing/deleted image from Google+

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I’ll install the electronics something like this + add A transparent cover to protect the power supply. Emergency Switch on the front of the dor + A fanmissing/deleted image from Google+

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Looks good!

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Will put @Ricardo_FALCAO ​’s words in english because I’m too interested: What is that power module ? Amperage ? Price ? Seller ?
Enjoying following your build from the beginning, keep it coming :+1:

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You can use this form to get in contact with the seller:

http://oferta.forum-cnc.pl/?o-firmie,1

(use English)

The one I have is 40V 400W
P=UI 400W=40V10A

possible to get PSU with other values.

  • Large electrolytic capacitors
  • separate fuse for each output
  • Over voltage protection
  • Separate 5V and 12V
  • Soft start

Ask for price

I`m going to power 4 x 4.2A stepper motors + the controller using this PSU

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@Oyvind_Amundsen thanks a lot !
A few more questions, if you please:

  • what is the little grey box between the toroidal transformer and the power module ?
  • why is there à fifth fuse and diodes set on the power module ?
  • what voltage your drivers will be running at ?
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http://williamson-labs.com/images/pwr-supply-vr-linear-446.gif

The small grey box is the rectifier in the power supply (sample image)

I’m going to run my drivers at 40V

I’ll try to find info about the fifth fuse

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@Oyvind_Amundsen isn’t the total power of your steppers well above your PSU rating ? Do you plan them not to draw their full power ?

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@Jeremie_Tarot
Hi, I wonder how many amps (A) your power supply supplies, and also where did you buy it and how much did you pay? Thank you, by the way, what was the origin of your name “Amundsen”? Thanks again …

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@Ricardo_FALCAO I don’t have one ATM. Still learning and finally, hopefully, about to design. But I already know my steppers will be 4+A, with the highest voltage possible, so I should end in the 800/1200W range…

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I`m not a pro when it comes to CNC and power supply… but he who made the PSU told me I do not need more than 400W for my setup.
He calculate power usage like this:
n * I * U * 1/2

where:
n - numer of axes
I - current of driver (motor)
U - voltage of supply

I`m going to run mine at 40V

Drivers set to 4.2A

1/2404.2= 84W

Power consumption is not constant and depend especially on acceleration. In this setup the large capacitor banks is the primary source of energy quickly consumed by the motor (driver)…

I have installed the different parts - wiring next :slight_smile: and stepper/config test.

https://plus.google.com/photos/102309741047174439430/albums/6369277044147006913/6369277043116188914

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@Oyvind_Amundsen OK, better understood with the full formula :wink:
Thought there should be a power usage ratio, but wouldn’t have gone as far as 1/2.
Also, I’d have considered number of motors instead of number of axes.
Thank you for sharing those details