Comments sought on new build: A CNC Router for RC Gliders and Planes

**njhussey** · 15-08-2010

Originally Posted by GeorgeD

Where did you obtain the power supply from at that price? HongKong?

How did you guess??

Yep good old eBay...http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=180406610821

I must admit that after reading lots about the cheap Chinese rubbish around on other forums I was a bit hesitant but it has worked well the 4 or 5 times I've powered the controller and stepper up to test so far...As long as it gets me into the CNC hobby and lasts a little while I'll be happy. Got a list coming together for my second one already with much better kit on it...

**mudscience** · 04-09-2010

Hi.

Newbie here.

Thanks for posting this thread as I too am working on collecting bits for my first build, which is to be for PCB issolation milling in the main, but would like to dabble in other stuff.

I am also working to a budget and looking to 'recycle' stuff where I can. Have just bought the same motors and have spent several days checking out the threads on the same driver board and PSU that you have gone for. Will be really interested to see how yours holds up.

Thanks again for the thread and good luck.

**njhussey** · 06-09-2010

Hi mudscience,

I've come to a bit of a stop at the moment due to various reasons. Hope to be able to kick start it again next week or so when things get back to normal, will keep posting any advances!!

**mudscience** · 06-09-2010

Thanks for the heads up. I know you said in your original post that you were looking for comments, but I wonder if I could ask a question to help me on my quest ... you've calculated that the motors will pull 4.5A. Depending on where I look I get different advise on what the 'guesstimate' total current will be. Some indicate # motors x A x 2, which in our case with the C355-P6V's will be 3 x 1.5 x 2 = 9A or # motors x A +2A = 6.5A. Any which way I think your covered, but I was wondering what 'rule of thumb' to use, because my next acquisition will be a PSU.

**njhussey** · 07-09-2010

Well I used the first one you mentioned, i.e. double the total amps for the 3 motors. I'm sure someone like Irving2008 will be able to tell you far more accurately! :)

**GeorgeD** · 15-08-2010

Nah,you got swindled...bouht a 15amp job last week for the same price as yours,mind you it really only delivers 13 amps... unless my meter needs caliberating?
http://cgi.ebay.co.uk/350W-24V-15A-S...t_Equipment_ET

oops! I got swindled you didn't pay any postage. lol

**njhussey** · 15-08-2010

Originally Posted by GeorgeD

oops! I got swindled you didn't pay any postage. lol

I did £8.19, total price was £21.29...I only need 4.5A so this is larger than my needs, I hope! :naughty: Hope yours comes better packed than mine, it was ratling about in the packing box, no damage tho luckily!!

**GeorgeD** · 15-08-2010

That all in one driver board you have from china.... try and keep it down below 24volts any higher than 26v and you're as for pops bangs and whistles.

**njhussey** · 15-08-2010

I read Irving2008's and others warnings about trying to put 36V through them. As I've only got 1.5A/winding Nema 23 steppers the PSU and controller should be ok!!

**njhussey** · 23-08-2010

Well been far too busy last week at work (clearing up all the bits and problems that had accumulated after 2 weeks on holiday

) and out of work (been doing DIY :confused:) but today managed in my lunch 3/4 hr to do a little something on my skate-o-rail bearing.

The problem with only having 3/4 hr is that by the time I've set the lathe up (read cleaning everyone else's muck off it!) I've run out of time to do anything!! Will have to set aside a saturday morning for a more serious production run! Anyway all I managed to do was cut 2 off 10mm sq steel axle supports, drill a 6mm hole in them and turn a rough (and I mean rough as the tool needed sharpening) axle.

Pics are attached. Ends need drilling and tapping yet and another 2 off units and the end plates making...still it's further forward that I was!!