Re: [CAD_CAM_EDM_DRO] Robotic Arm

Hi Mark,

I don't have a tape hinge. I just lift the screen up from the end away from
the 2 pins, then lay it aside. I did 3 panel of 4 boards each over the
weekend. I used the paste straight out of the fridge. Seemed to work better
when a little stiff.

Cheers,

Peter.

Mark Vaughan wrote:

> Thanks Peter.
> That's about a 100 micron sheet over here in the UK.
> I did buy a proper screen printing machine for it, it has really nice
> alignment screws, and massive adjustable bearings on the stencil frame
> clamps, but the whole thing is flimsy on it's base and registration is very
> poor.
> I was thinking of doing something like you are doing, with reg pins and a
> masking tape hinge. Easy to remove for cleaning the stencils.
>
> Thanks for input
> Regs Mark
>
> Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
> Managing Director
> Vaughan Industries Ltd, reg in UK no 2561068
> Water Care Technology Ltd, reg in UK no 4129351
> Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> Phone/Fax 44 1872 561288
> RSGB DRM111(Cornwall)
> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Peter Homann
> Sent: 27 March 2007 10:34
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Robotic Arm
>
> Hi Mark,
>
> The stencil I use is 4mil mylar from http://www.smtstencil.com/
>
> When I got it made I had the 4 panel mounting holes put onto the paste mask
> file that I sent.
>
> As the mounting holes are 3mm, I got some 3mm dowel pins and mounted 2 of
> them
> into a piece of MDF. THE PCB panel was located on the Pins, then the mylar
> stencil was then placed on the 2 pins. Perfect Alignment. I then used spare
>
> PCBs to pack around the panel. A plastic putty spatula and some paste
> finished
> the job.
>
> Cheers,
>
> Peter.
>
> Mark Vaughan wrote:
>> Peter
>>
>> What thickness Mylar are you using for your screen print?
>>
>>
>>
>> I’ve got my machine it’s an old Dynapert 318, but with a full set of spare
>> parts and over two hundred parts feeders.
>>
>> I also bought a full conveyer oven, which arrived about a week ago,
> customs
>> having ripped half the insulation out looking for drugs.
>>
>> Am awaiting my first batch of PCB’s for one of our marine products for a
> smt
>> run.
>>
>> The mylar film, or stainless sheet laser cutting have all now given loads
> of
>> options, but have very little advice.
>>
>> One of the US dealers has dropped the price of their Chinese conveyer
> ovens
>> from $10,000 to about a quarter of that. It has three heating zones, and a
>> big set of fans to cool the parts.
>>
>> Actually the oven would be the easiest thing to make, they say it’s all
> very
>> hi tech, but as you know from your delonghi the technology is minimal. My
>> conveyer oven does have a few safety issues, like the plug to the fans is
> a
>> microphone connector with 240V on it, and live pins. My only complaint is
>> the gap isn’t high enough to get a pizza through.
>>
>> I looked at an oven on ebay the other day, it went for £20, I was very
>> tempted until I discovered it was 5m long, 3m wide and draws 50 amps on
> each
>> of three phases. But for others that are interested there are box table
> top
>> ovens for sale from China starting at around a thousand bucks ($).
>>
>>
>>
>> Regs Mark
>>
>>
>>
>> Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
>>
>> Managing Director
>>
>> Vaughan Industries Ltd, reg in UK no 2561068
>>
>> Water Care Technology Ltd, reg in UK no 4129351
>>
>> Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
>> Phone/Fax 44 1872 561288
>>
>> RSGB DRM111(Cornwall)
>>
>> _____
>>
>> From: CAD_CAM_EDM_DRO@yahoogroups.com
>> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Peter Homann
>> Sent: 27 March 2007 06:36
>> To: CAD_CAM_EDM_DRO@yahoogroups.com
>> Subject: Re: [CAD_CAM_EDM_DRO] Robotic Arm
>>
>>
>>
>> Hi Jon,
>>
>> See below.
>>
>> Jon Elson wrote:
>>> Peter Homann wrote:
>>>> Hi Jon,
>>>>
>>>> Good choice. I received my Pick and place machine a couple of weeks ago.
>>>> It is a Yamaha YM-84, commonly known in the USA as a Philips CSM-84.
>>>>
>>>> It came with about 50 feedersas well. I've already run out of feeder
>>>> slots
>>>> on the machine. It has 3 heads (0.7mm, 2mm and one about 4-5mm. It also
>>>> has a pneumatic centering station plus an upwards looking centering
>>>> vision
>>>> camera. Plus a tray freeder
>>>>
>>>> Ran off a handful of ModIO panels and a DigiSpeed panel over the
>>>> weekend.
>>>> It's quite a fun machine to use.
>>>>
>>>> One of the thinks I need to make is a number of waffle trays to hold
>>>> various components. One of them is the power inductor for the ModIO
>>>> power
>>>> supply. I purchase a part reel without the reel and the tape is all
>>>> cracked up. Iplan to use some 4mm perspex to mill an array of pockets to
>>>> suit the inductor. I'll draw it up in Autocad and use sheetcam to do the
>>>> nesting array and produce the G-Code.
>>>>
>>>> I've had a days training on it, and it is now productive.
>>> Great! I was worried that there was a malfuction, but I just
>>> had to manually crank the axes into the center of the workspace
>>> and then the error condition cleared up.
>>>
>>> I have a lot to learn on how the board conveyor and work stops
>>> are supposed to be used. I don't think it would take too long
>>> to get it placing parts, but I don't have any facility for
>>> applying the solder paste or reflowing the boards, yet.
>> The machine comes with a pendant that controls the menu on the RH screen.
>> The interface is primitive and similar to a Nokia phone text interface. It
>> hakes a while to get used to but is consistant.
>>
>> Do you have a manual with it? If you have questions I can answer them to
>> the best of my limited knowledge.
>>
>>> What are you doing for that?
>> I use a mylar laser cut stencil for applying paste. I also have a
>> pnuematic paste despenser as well.
>>
>> For reflowing I use a fanforced toaster oven that I made a temperature
>> controller for.
>>
>>> I see a solder paste dispenser is available, but this machine
>>> didn't come with one. (I still have to go through all the boxes
>>> of extra stuff, there could be one in there.)
>> I was told that many have tried unsuccessfully to get the despenser to
>> apply paste. It should only be used for adhesive.
>>
>>> Thanks,
>>>
>>> Jon
>>>
>>>
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>> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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