PCB Manufacture

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peterwaller
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PCB Manufacture

Postby peterwaller » Fri Mar 03, 2017 12:08 pm

Having virtually exhausted my supply of speed controller boards I decided to have a go at updating it a little to get the size down.
I haven't gone as far Rory as I wanted to keep the option of plug and play so having decided to retain the Lemon receiver I reduced the controller to the same size as that.
I am using the MX612 driver chips that Rory found which needs either more counters or at least re-configuring them in real time so I bottled it and just added a couple of OR gates to switch the PWM signals around. This meant that apart from inverting the data table there are no software changes.
Any way to get to the point of this post I was looking for somewhere to get the boards made and found this place call RAGWORM.
http://www.ragworm.eu/
They manufacture in this country and the price for 6 off of these boards was just under £20 including VAT and delivery with a 7 working day turn round which I thought was really good.
It seems I could have ordered just one for £3.89 but that seemed a bit mean.
I ordered the boards today having got them to check my Gerber files first lets hope I got the layout correct. :roll:

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Rapidrory
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Re: PCB Manufacture

Postby Rapidrory » Fri Mar 03, 2017 5:43 pm

Ooh, interesting!

I've been using this place recently, which is cheap and has an ~8 day turn around, but shipping is about £20 which is a pain. http://www.smart-prototyping.com/PCB-Prototyping.html
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

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peterwaller
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Re: PCB Manufacture

Postby peterwaller » Fri Mar 03, 2017 7:11 pm

I have had a couple of problems the drilling output was set to symbols not actual sizes and the sizes when added were in mill not mm but hopefully with those two problems cleared up it should got ahead when they get my email on Monday.
I will let you know how it works out and these are purely for me so not trying to complete with you.

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BeligerAnt
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Re: PCB Manufacture

Postby BeligerAnt » Fri Mar 03, 2017 10:52 pm

I recently stumbled across this site which gives prices from a number of low-cost prototype vendors:

http://pcbshopper.com/

The only downside is all the manufacturers seem to be based in China or the USA so shipping time can be an issue (long or expensive!). I've yet to find anywhere in Europe that can compete on very low cost and reasonable delivery. Ragworm look promising but only for very small boards - bigger boards get expensive very quickly. :( We use PCB Train at work and they are very good and really quick if you want a 2-layer board without solder resist or silkscreen. However they're expensive for hobby use.

Still looking for a good, cheap supplier preferably in Europe if anyone finds one...
Gary, Team BeligerAnt

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peterwaller
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Re: PCB Manufacture

Postby peterwaller » Fri Mar 17, 2017 7:26 pm

I know I have put this info in my antweight section but for completion I thought I ought to put it here also.
The final data I had missed got to them on the Monday and they were dispatched the following Monday and received on the Tuesday.
The boards seem to be well made and even had gold on all the solder pads.
The bare boards
Image
While trying to solder extra wires to the processor to allow me to reprogram it in situ I managed to bridge the battery power and 5 v rails which resulted in the destruction of every chip on the board but I was able to remove and replace them all without loss of any pads or tracks which my home made boards wouldn't have survived.
In fact when you consider the cost of the photo resist board and the ferric choride plus the rivets for the plated through holes I recon these were cheaper than homemade.
The built up board
Image

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peterwaller
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Re: PCB Manufacture

Postby peterwaller » Wed Mar 22, 2017 6:58 pm

I just had an interesting email from Ragworm today it appears that that actually make more boards than you order and put them in what they call there life saver service.
In my case I ordered 6 boards and they have another 6 already made and I can buy these at £1.64 each (originally £3.29) and they will dispatch them 1st class post free of charge.
I don't know whether you can depend on this when deciding how many to order or if it depends on how much of the standard size board they have spare but it could make it even cheaper.

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BeligerAnt
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Re: PCB Manufacture

Postby BeligerAnt » Wed Mar 22, 2017 8:51 pm

With very small boards like this you may often get a few extra, but it will depend on how they fill the panels when they run the boards. A good deal if you get the offer and can make use of it though!
Gary, Team BeligerAnt


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