substitute for 4.7k resistors?

[Bo Herrmannsen]

have the 4.7k´s been changed to something else?

[Alan Wood]

I don't think so, which resistor on which boards are you referring to?

regards

Al

On Mon, Nov 11, 2013 at 9:58 AM, Bo Herrmannsen <bo.herr...@gmail.com> wrote:

have the 4.7k´s been changed to something else?

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[Bo Herrmannsen]

i miss both the 4.7k for the drivers and the 4.7k on the contoller

better double check while at it

[Alan Wood]

Check which resistor numbers and if you have anything left over instead?

regards

Al

[Bo Herrmannsen]

r7 on the drivers

r1-r4 on contoller

have only 510 ohms in leftover... funny enough just the 6 resistors i miss

let me check value.. need magnify glass

[Bo Herrmannsen]

yep... 510 ohm

green brown black black brown

 

Den 11/11/2013 kl. 11.18 skrev Alan Wood:

[Alan Wood]

Ok you might need to check that you haven't used the 4k7 resistors as 470 Ω already in the board (easily done). The 510 Ω resistors are to replace the 470 Ω.

regards

Al

[Bo Herrmannsen]

will do but sure since i asked about the 470 ohm before i soldered

[Bo Herrmannsen]

dooh

i did....so time to desolder them

Den 11/11/2013 kl. 11.33 skrev Alan Wood:

[Bo Herrmannsen]

while coecting this fault of mine is there a chance that the egle files are free availble in the case i ripped out a through plating and need to repair it?

Den 11/11/2013 kl. 11.33 skrev Alan Wood:

[Alan Wood]

Yes, they are opensource hardware:

http://solderpad.com/folknology/dual-stepper-motor-module

http://solderpad.com/folknology/open-motion-controller

regards

Al

[Andrew Harvey]

Bo,

I did exactly the same thing. Very easily done, I had to repair some tracks as well. The heat needed to de-solder the resistors seems to damage the pads and then I ripped them off completely. Never mind, I've fixed them now.

I'm going to offer to share my experiences in person with anyone (at Reading Hackspace) who needs help with the soldering, just trying to work out if I am free to attend the meeting today.

[Bo Herrmannsen]

hehe

the pad around the holes are IMHO a tad to small... 

[Alex Gibson]

Hi Al, 

Before I do - can I check that OSH means you're entirely happy for me to hack about with your board design and make something that is functionally very similar but in a very different form factor?  Obviously with full credit.  Licence terms terms aside I am new to the etiquette - maybe could work with you on it with you even?

Alex Gibson

• Project management

• Process improvement

• 3D printing

[Alan Wood]

Hi Alex

Yes feel free, if you have any queries about the design or components etc.. please fire away.

What are your design goals out of interest?

regards

Al

--

[Alex Gibson]

Hi Alan, 

In large part it's a learning experience, but the main thing is to get a triple extruder monolithic board in a really neat form factor for the TVRR. By neat, I mean fitting nicely with the structure, not necessarily compact, and I really want to mill it using the printer itself -however far from ideal this may be - in a reprap spirit- so the track layout needs beefing up to make this possible.  It is not top of my to do list but wanted to check your thoughts in case the whim takes me to spend some free time on it!!

Cheers,

Alex Gibson

• Project management

• Process improvement

• 3D printing

[Alan Wood]

Well we would certainly need to have a conversation about it, as There are a number of component changes you should make in such a design in order to avoid obsolescence. You would also neeed to practice milling some of the more difficult package footprints like the Tosh drivers Zip package to make sure it can be easily milled.

regards

Al