Homebrew PCBs

Hi guys,

Several of you folks have made spray etching tanks.  What are you 
using for pumps?

I plan to continue using Ferric Chloride and would appreciate any 
pointers, suggestions, or other information that might be helpful in 
the making of a spray tank.

Thanks!

Chris

----- Original Message ----- 

From: "lcdpublishing" <lcdpublishing@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, May 07, 2007 10:51 AM
Subject: [Homebrew_PCBs] What to use for a pump when spray etching?


> Hi guys,
>
> Several of you folks have made spray etching tanks.  What are you
> using for pumps?
>
> I plan to continue using Ferric Chloride and would appreciate any
> pointers, suggestions, or other information that might be helpful in
> the making of a spray tank.

A peristaltic pump might work. It will avoid corrosion and sealing problems.

Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND and FT-857D transceivers
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller

Coincidentally, I have just finished repairing a peristaltic pump for a 
local company. The volume of liquid moved is not high so I wonder if 
that would really be a practical approach.

Regards,

Ross McKenzie
ValuSoft
Melbourne Australia

Leon wrote:

> ----- Original Message -----
> From: "lcdpublishing" <lcdpublishing@... 
> <mailto:lcdpublishing%40yahoo.com>>
> To: <Homebrew_PCBs@yahoogroups.com 
> <mailto:Homebrew_PCBs%40yahoogroups.com>>
> Sent: Monday, May 07, 2007 10:51 AM
> Subject: [Homebrew_PCBs] What to use for a pump when spray etching?
>
> > Hi guys,
> >
> > Several of you folks have made spray etching tanks. What are you
> > using for pumps?
> >
> > I plan to continue using Ferric Chloride and would appreciate any
> > pointers, suggestions, or other information that might be helpful in
> > the making of a spray tank.
>
> A peristaltic pump might work. It will avoid corrosion and sealing 
> problems.
>
> Leon
> --
> Leon Heller
> Amateur radio call-sign G1HSM
> Yaesu FT-817ND and FT-857D transceivers
> Suzuki SV1000S motorcycle
> leon355@... <mailto:leon355%40btinternet.com>
> http://www.geocities.com/leon_heller 
> <http://www.geocities.com/leon_heller>
>
>

> Ross wrote:
>
> Coincidentally, I have just finished repairing
> a peristaltic pump for a local company. The
> volume of liquid moved is not high so I wonder
> if that would really be a practical approach.

Ross,

Adam Seychell states a model number of a pump
in his posts about a spray etcher.  It was a
diagphram pump from a company called sureflow.
No metal parts in contact with the pumped liquid
and bolts that hold it together may have even
been from titanium to make it even more
tollerant.

From memory Adam is in the same city as you so
there is probably a local supplier.

Andrew,

I was commenting on the suitability of peristaltic pumps (or more 
correctly the one I repaired) for the task. I am not in the market to 
make a spray etcher. But thanks anyway...

Regards,

Ross McKenzie
ValuSoft
Melbourne Australia


Andrew wrote:

> > Ross wrote:
> >
> > Coincidentally, I have just finished repairing
> > a peristaltic pump for a local company. The
> > volume of liquid moved is not high so I wonder
> > if that would really be a practical approach.
>
> Ross,
>
> Adam Seychell states a model number of a pump
> in his posts about a spray etcher. It was a
> diagphram pump from a company called sureflow.
> No metal parts in contact with the pumped liquid
> and bolts that hold it together may have even
> been from titanium to make it even more
> tollerant.
>
> >From memory Adam is in the same city as you so
> there is probably a local supplier.
>
>

>diagphram pump from a company called sureflow.
>there is probably a local supplier.

Check RV repair places those are water pumps for an RV
there kinda pricey if I recall.

lcdpublishing wrote:
> 
> 
> Hi guys,
> 
> Several of you folks have made spray etching tanks. What are you
> using for pumps?
> 
> I plan to continue using Ferric Chloride and would appreciate any
> pointers, suggestions, or other information that might be helpful in
> the making of a spray tank.
> 
> 

The Surflow pumps actually use stainless self tappers, as I found out 
the hard way. I did not try to source titanium replacement screws. 
Although it would of been much easier to just re-thread the plastic body 
with a M5 tap and replace the three self tappers with button head 
titanium bolts (Ti self tappers are rare as hens teeth). Instead I 
plastic coated steel screws and put nuts on the other side. There was a 
lot of work to make room for the nuts.
Alternatively, I believe the competing Flojet brand pumps have no metal 
parts in contact with fluid.

I posted a link the other day describing a little on the spray etcher.
Hope it answers you question. The URL again:
http://members.optusnet.com.au/~eseychell/PCB/SprayEtcher/index.html


Adam

My 2 cents on the spray Etching Pump,
just came across this: 

March AC-4C-MD 
Metal-Less 
Pump 
For Semi-Corrosive 
Magnetic Drive-Model

(copy & paste the entire link, line wrap killed it)

( http://www.usplastic.com/catalog/product.asp?catalog%
5Fname=USPlastic&category%5Fname=49&product%5Fid=7711 )

(Sorry NO, I'm not going to use any of those `Link Truncator' sites.)


--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@...> wrote:
>
> Hi guys,
> 
> Several of you folks have made spray etching tanks.  What are you 
> using for pumps?
> 
> I plan to continue using Ferric Chloride and would appreciate any 
> pointers, suggestions, or other information that might be helpful 
in 

> the making of a spray tank.
> 
> Thanks!
> 
> Chris
>

Yes, but I will:

*http://tinyurl.com/25t8c4

**http://preview.tinyurl.com/25t8c4*

http://www.usplastic.com/catalog/product.asp?catalog%5Fname=USPlastic&category%5Fname=49&product%5Fid=7711&cookie%5Ftest=1 
<http://www.usplastic.com/catalog/product.asp?catalog%5Fname=USPlastic&category%5Fname=49&product%5Fid=7711&cookie%5Ftest=1>




scratch_6057 wrote:

> My 2 cents on the spray Etching Pump,
> just came across this: 
>
> March AC-4C-MD 
> Metal-Less 
> Pump 
> For Semi-Corrosive 
> Magnetic Drive-Model
>
> (copy & paste the entire link, line wrap killed it)
>
> ( http://www.usplastic.com/catalog/product.asp?catalog%
> 5Fname=USPlastic&category%5Fname=49&product%5Fid=7711 )
>
> (Sorry NO, I'm not going to use any of those `Link Truncator' sites.)
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
> <lcdpublishing@...> wrote:
>   
>> Hi guys,
>>
>> Several of you folks have made spray etching tanks.  What are you 
>> using for pumps?
>>
>> I plan to continue using Ferric Chloride and would appreciate any 
>> pointers, suggestions, or other information that might be helpful 
>>     
> in 
>   
>> the making of a spray tank.
>>
>> Thanks!
>>
>> Chris
>>
>>     
>
>
>
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> If Files or Photos are running short of space, post them here:
> http://groups.yahoo.com/group/Homebrew_PCBs_Archives/ 
> Yahoo! Groups Links
>
>
>
>

Not sure what metals these things are made of, but there are solid
state fuel pumps available that hold up pretty much to all solvents.
I'm not sure if the CuCl or ferric chloride would eat them or not.

JCWhitney sells some:
They're probably a plated steel or maybe a diecast.

http://www.jcwhitney.com/autoparts/Search?catalogId=10101&storeId=10101&sku=fuel+pump&searchbtn.x=20&searchbtn.y=12
http://www.jcwhitney.com/autoparts/Product/Pr-p_Product.CATENTRY_ID:2011022/c-10101/Nty-1/p-2011022/Ntx-mode+matchallpartial/N-10101/tf-Browse/s-10101/Ntk-AllTextSearchGroup?Ntt=fuel+pump
http://www.jcwhitney.com/autoparts/Product/Pr-p_Product.CATENTRY_ID:2005660/c-10101/Nty-1/p-2005660/Ntx-mode+matchallpartial/N-10101/tf-Browse/s-10101/Ntk-AllTextSearchGroup?Ntt=fuel+pump

Not sure I'd want to spend 30 - $40 to melt one down but maybe someone
else has already tried one and knows the results.

- phil



--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing"
<lcdpublishing@...> wrote:

>
> Hi guys,
> 
> Several of you folks have made spray etching tanks.  What are you 
> using for pumps?
> 
> I plan to continue using Ferric Chloride and would appreciate any 
> pointers, suggestions, or other information that might be helpful in 
> the making of a spray tank.
> 
> Thanks!
> 
> Chris
>

On 8 May 2007, at 13:16, scratch_6057 wrote:

> (Sorry NO, I'm not going to use any of those `Link Truncator' sites.)

Try enclosing long URLs in angle bracket thus: <very long URL>

I don't usually bother reconstructing mangled links in emails, life's  
too short.

-- 

Cheers

Derryck

On the automotive front, used to be able to buy small 12 volt
pump to replace the one in the windshield washer system.
I don't recall seeing any of those recently, I think they are mostly
incorporated into the fluid reservoir now. Maybe a salvage yard could
produce a usable tank and pump? New the washer pump and reservoir
might cost more than the fuel pump.

[Non-text portions of this message have been removed]

scratch_6057 wrote:
> 
> March AC-4C-MD
> Metal-Less
> Pump
> For Semi-Corrosive
> Magnetic Drive-Model
> 

Did you check the flow rate profile of this US$225.35 pump ?
20 feet head (60kPa) is pathetic for any spray nozzle.
Like I said, use a 12Volt RV diaphragm pump, US$50 and get 200+ kPa.

Adam