Bandido 2 Modified

[bernte_one]

hello merc

etched my pcb last weekend (the one from above post b/w picture)
looks good

did yours run good? have you made a video?

[cr15]

Is there any problem with using a wirewound pot for a Ground Balance adjustment? I'm using a Vishay 50K 5-turn wirewound pot on my Bandio II and I'm wondering if the inductance is causing any problems.

Merc

Merc, I replaced the ground balance pot in my original Bandido with the exact same pot you have used, because the original became scratchy. There have been no discernible problems during the last ten odd years.

[bernte_one]

hello merc

can be that the self inductance / capacity on the multiturn pot works like a choke too and not like a pure single turn pot? i have a lot fantasy

[Merc]

Is there any problem with using a wirewound pot for a Ground Balance adjustment? I'm using a Vishay 50K 5-turn wirewound pot on my Bandio II and I'm wondering if the inductance is causing any problems.

Merc

[Merc]

Well I ended up adding C18 back to the board. Without it I could not seem to ground balance properly.

Merc

[cr15]

You are a star, Merc. I was just going to see if our PCB man could do anything with just the black and white image of the copper. Now I will present him with these! Thanks.

[Merc]

FYI, I just noticed a slight possible discrepancy between the Gerber the layout and the Gerber files. After I had milled and assembled my board, I decided to move the speaker ground to place it closer to the regulator ground.

Merc

[Merc]

I do the PCB layout with Kicad. Within kicad I export a Gerber file. I then use a piece of software called DeskPCB that takes in the Gerber file and does the trace isolation for me and outputs the G-Code which my V90 uses directly. Here are the original Gerber files and the G-Code which is tweaked for my machine. Since I had to zip everything, I stuck some other files in there as well.

Merc

[cr15]

I am working on the black and white image. I created layout in Kicad so I cannot export in Sprint or Eagle format. Not that I know of anyway.

Merc

It is possible to migrate Kicad to Eagle. Don't ask me how because it was someone else that did it here in work and they have now left the company. I suppose I could do some research though.....

[cr15]

Merc, what layout package are you using? Would you be prepared to let me have a copy of the Gerber file? I have a CNC available to me and would like to duplicate your experiences.

[bernte_one]

thanks merc

i think the last infos are enough
after i build igsl i will try bandido

[Merc]

The only change I made was to remove C18(30pf). This seemed to improve sensitivity a small amount. I noticed that other Tesoro designs using FETs did not have this capacitor. Also, the GMT King Cobra(based on Tesoro design) uses FETs and does not have a capacitor in that location. I did not change the board. I can post a better black and white image if that is what you need.

Merc

[bernte_one]

hello merc

please can you post your latest pcb files
or a black / white printout of your pcb

looks nice will try it

[bernte_one]

yes right many many thanks

[Merc]

Here is a black and white layout image without mounting holes.

Merc