AC Dimmer

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pokemon99
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Re: AC Dimmer

Post by pokemon99 » Tue Dec 12, 2017 2:48 pm

That's how it looks to me.
Of course not as beautiful as you have Roger, but I have enough
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RogerClark
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Re: AC Dimmer

Post by RogerClark » Tue Dec 12, 2017 8:56 pm

Your board looks good. Did you etch it yourself ?

BTW. I found it was cheapest to buy a high power dimmer board from eBay, then remove the triac and heat sink.
The only problem is that the position of the screws for the heat sink can change, if you order some more dimmers, even if you order from the same vendor.

pokemon99
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Re: AC Dimmer

Post by pokemon99 » Tue Dec 12, 2017 9:27 pm

Thanks.
Yes, himself. But it's made for cnc machine.

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RogerClark
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Re: AC Dimmer

Post by RogerClark » Tue Dec 12, 2017 10:50 pm

Do you mean its "routed" or engraved ?

pokemon99
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Re: AC Dimmer

Post by pokemon99 » Wed Dec 13, 2017 8:10 am

RogerClark wrote:
Tue Dec 12, 2017 10:50 pm
Do you mean its "routed" or engraved ?
engraving and drilling

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RogerClark
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Re: AC Dimmer

Post by RogerClark » Wed Dec 13, 2017 8:35 am

OK.

I tried that but I did not get good results. However I think it would be OK for a board like that which does not have very small SMD components

pokemon99
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Re: AC Dimmer

Post by pokemon99 » Wed Dec 13, 2017 8:56 am

RogerClark wrote:
Wed Dec 13, 2017 8:35 am
OK.

I tried that but I did not get good results. However I think it would be OK for a board like that which does not have very small SMD components
smd size 1206, good

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RogerClark
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Re: AC Dimmer

Post by RogerClark » Wed Dec 13, 2017 9:01 am

Yes. I think I can manage to mill 1206, but I wanted to mill the PLCC48 for a STM32 and its virtually impossible on my cheap CNC machine

pokemon99
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Re: AC Dimmer

Post by pokemon99 » Wed Dec 13, 2017 9:10 am

At me too not dear, cnc 1610, noticed a vertical lift at the bottom the screw has no bearing and consequently there is a small backlash, there is no time it is borrowed by it.

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RogerClark
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Re: AC Dimmer

Post by RogerClark » Wed Dec 13, 2017 10:49 am

I just have one of those cheap (Chinese) A4 CNC milling / router machines, but there is lots of backlash on the vertical axis and I didn't even bother to try to do all the vertical mapping of the PCB, as I would need to modify my controller etc etc

Far easier to just get the boards made in china

At the moment AllPCB seem to be doing amazing deals, but all the others are cheap as long as you are willing to wait for slow deliver

I've only used DirtyPCB's and they were OK, and relatively cheap

PS. Can you take a photo of the bottom / copper side of your PCB.
Its important that you mill large gaps between the live and neutral lines. I think ideally this distance is quite large
I think were possible I tried to have 2.5mm separation (no copper at all)

See

http://www.smps.us/pcbtracespacing.html

Also as I had a 2 layer PCB made, I'm using both sides of the board to carry the power

The main problem keeping 2.5mm separation, is that its not possible at triac its self, because the pins are only about 3 or 4mm apart.

I presume ideally the tracks need to be tapered as they approach the triac, but that's tricky on KiCad unless perhaps the track is a zone.

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