power supplies.

[LeeWay]

I already have a working CNC router with a Xylotex drive. I am in the process of converting a mini mill to ball screws and big motors. 400 oz in possibly. Anyone have a link for a good power supply for the Gecko's?

[NC Cams]

Sure do.

What are your motor's power requirements????

[LeeWay]

Thanks for the reply. I may have jumped the gun on it a bit. I went ahead with this PS.

Here is a link to the motor specs.

I know this is a regulated PS. What I don't know is if it has the large capacitor inside it. The first machine I built used a linear PS with that included. I am going to go with the suggested 5 amp fuses, so I will need the three small capacitors for that, so I should probably pick up the large one while I am at it. I was unable to find any documentation on this PS that reveals how it's laid out. I would still like to see what you suggest.
Thanks.

[NC Cams]

You might find this link to be of interest:

http://www.campbelldesigns.com/files...ply-part-1.pdf

I seem to recall that Gecko has a download available from their website that helps explain how to calculate power supply requirements/specs based on the motor(s) being used.

[Greolt]

Originally Posted by LeeWay Thanks for the reply. I may have jumped the gun on it a bit. I went ahead with this PS.

I have that power supplies big brother. That will give you 30v at 6amps or 60v at 3amps

And as a bonus it will also supply a 5v outlet that you can use to run your breakout board or whatever.

The capacitor you are reffering to is to smoothe out the rectified ac on your other power supply.
This one you've bought will give very little ripple so that won't be needed.

Greolt

[LeeWay]

Thanks a bunch, Guys.
I did find the link interesting ready. I do need to be held by the hand when it comes to the math of it. At least I feel more comfortable that way.

I think the link at Gecko is about the Stepper Motor Basics here.

I was actually reading this to help me decide on this PS. I should be able to get a max of 60 volt 6amp on this PS, so doing the math if I intend to wire the motors up bipolar parallel, the rating for one motor would be 4.17 volts at 2.8 amps.
According to the link, a drive will draw less than 2/3 of the motors current rating, which I think is about 1.86 amps. This times three motors would come to 5.598 amps. I think I would then divide this by two for this particular PS, because its basically three supplies in one, but one being 5v constant (which I did need for another item I picked up). That would be 2.799 amps per side of the PS.
Now the voltage. The Campbell's page you linked stated it should be 20 to 25 times the voltage rating. The Gecko sheet says 3 to 25 times. The Gecko's operating range is 24 to 80 volts, so at the max voltage from this PS of 60 volts, I am at about 14 and a third times the voltage of 4.17. Not quite up to snuff for the Campbell formula, but well within the Gecko formula.
I am converting an X2 mill. Won't be much of the mill left when done. Getting rid of all the dovetails. I will be using ball slides and ball screws on the X and Y. The Z is one complete unit aleady. Its a crossed roller way assembly with ground ball screws as well. This will bolt directly on the mill column.
Here's a picture before I cleaned them up.

Heres a link to the other little item that I picked up on Ebay. I haven't hear much about these, but the price seemed right for what it is.

Thanks again, Guys. I am itchin to get this underway.