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are you planning to route out the pcb on a blank board
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Hi there
I want to build this one but where can i find the PCB G-codes for the UHU servo card ?
Thanks i advance.
Per
are you planning to route out the pcb on a blank board
Yes, on my router.
there was a plt file some where you might search the old UHU thread for that in the initial few pages, also there were pdf files.
look into vroemms wiki, you might find all the files there.
Yes, i have found them but i need them in another format eg G-code or Eagle files so i can handle them in a proper program and run it in Mach3.
not that I know of!
New UHU assembly Hi everybody !
I got the parts from Reichelt.de and made the PCBs, after verification the PCBs have only a 35µm copper layer on them not the 75µm claimed in the parts list.
Since it's my first "high" voltage/current project, i was wondering how much amps could a 35µm UHU PCB stand with no problem ?
I didn't remove the toner transfer yet because i don't know how to protect the copper from corrosion & heard that tin plating a PCB lowers the circuits frequency so, does anyone has a working solution ?
Is there a way to improve the PCB to make it more reliable ?
For those using the old PCB, can you please post some pics of your setups ?
(bottom views apreciated)
Thanks !
cnc2
Have a look at http://de.wikibooks.org/wiki/Bild:Cu..._(1oz_ext).PNGOriginally Posted by cnc2
This is not a problem at the frequencies used by UHU.
If you find that an trace can not carry the required current at 35 µm thickness, you can solder a wire on the affected trace.
Klaus Leiss
Hi cnc2,
If you look through the old thread I have posted a picture of my first board. The link is here: /post 593/
DIY Servo controller
The other 4 boards are somehow different since I have used rectangular wire, something like 4x1mm if I remember correctly, but I do not have pictures of them. It is a problem when trying to solder this big thing on the board and if you get it too hot for too long time the board is going to bend which is not that nice.
It will be interesting to show my boards since they are made like noone has done here on the thread - the FET's are on the other side of the board. It's a problem I don't have my camera here now, maybe will do it with the phone, quality will be poor, but enough to see.
Todor
Thaks a lot Klaus !
Unfortunately i don't read German, but the graph says it all and in detail.
Thanks !
cnc2.
Thanks Todor !
Waw that's a monster PCB for a monster motor, did you finish building your machine yet ?
Some pics & vids please !!
What did you put on the copper to protect it from corrosion, i mean in the low voltage side where it isn't tin plated ?
Thanks !
cnc2.
Last edited by cnc2; 09-03-2008 at 10:38 PM.
Hi cnc2,
Since I don't have one of those fancy spray stuff that protect the pcb I've done it the old-fashioned way - a cotton tampon with ethyl alcohol which dissolves the resin. This makes a very thin layer of resin all over the board which manages to do the work and helps soldering later. I know there is a better way to do this, but that's how I've done it.
The copper wire was a bit of an overkill, thats why I've used thinner wire on the latest boards.
The machine is still under construction, took more time than we thought in the first place. We are doing the control box in the moment which will house both the computer and the servo controllers. Looks like a small fridge in size.
Todor
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