File - monthly.txt
2005-07-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line
Messages
Browse messages
Page 518 of 707 · 35337 messages matched
[Homebrew_PCBs] Power supply, was: Hmm, another thought....
2005-07-01 by Robert Hedan
I m in the process of finalizing a power supply circuit designed specifically for a light-duty CNC. I should have a 1/2 decent diagram some time today, I ll
Re: Hmm, another thought....
2005-07-01 by lcdpublishing
I have to admit, the EDM process sounds very interesting. I am 99% certain it could be easily adapted to any existing CNC router (or mill). My fear is the
Re: [Homebrew_PCBs] Hmm, another thought....
2005-07-01 by Leon Heller
... From: lcdpublishing To: Sent: Friday, July 01, 2005 3:48 PM Subject: [Homebrew_PCBs] Hmm,
Re: [Homebrew_PCBs] Hmm, another thought....
2005-07-01 by Stefan Trethan
On Fri, 01 Jul 2005 16:48:24 +0200, lcdpublishing ... solder paste for SMD is just solder dust and flux mixed to a paste. it must be soldered (melted) to
Hmm, another thought....
2005-07-01 by lcdpublishing
There is a solder paste of some sort that is used on surface mount circuit boards. Once that material hardens (dries, cures, or whatever it does) is is hard
Re: [Homebrew_PCBs] Re: newbie::Sorry but what is EDM?
2005-07-01 by Stefan Trethan
... I don t think it is an issue. Think about arc welding, you use a lot more current there. ST
Re: [Homebrew_PCBs] Re: Re: newbie::Sorry but what is EDM?
2005-07-01 by Stefan Trethan
... of course, what was i thinking with that dynamic... ST
Re: Re: newbie::Sorry but what is EDM?
2005-07-01 by Bengt Sjölund
EDM = Electrical Discharge Machining Google for EDM and you will find more information Cheers Bengt [Non-text portions of this message have been removed]
Re: newbie::Sorry but what is EDM?
2005-07-01 by mikegw20
... [snip] ... since. ... Now that sounds like fun. I wonder how much interference it causes. As I live under/near a flight path it might be handy to know. Do
Re: [Homebrew_PCBs] newbie::Sorry but what is EDM?
2005-07-01 by Stefan Trethan
... Yes it is electrodynamc milling. Basically a series of sparks eordes the workpiece. It is done under a fluid (water or special oil), and there are many
newbie::Sorry but what is EDM?
2005-07-01 by mikegw20
EDM? I had a quick search in the messages and I get the feeling it is some sort of electrode ablative process. Does someone have a link or two that spells it
Re: [Homebrew_PCBs] Re: For chemical etching, what materials are good for resist?
2005-07-01 by Bob & Linda Gardner
You might try the demo version of WinQcad. I believe it is limited to less than 500 pins. It outputs G Code for milling boards. http://www.winqcad.com/ Bob
Re: [Homebrew_PCBs] Question about GBC Laminator at Staples
2005-06-30 by KD5NWA
They modify it, but the instructions are at their site. ... Cecil Bayona KD5NWA Never argue with an idiot. They drag you down to their level then beat you
Re: [Homebrew_PCBs] For chemical etching, what materials are good for resist?
2005-06-30 by JanRwl@AOL.COM
In a message dated 6/30/2005 8:07:35 A.M. Central Daylight Time, lcdpublishing@yahoo.com writes: With regard to chemical etching of boards, what chemicals or
Re: [Homebrew_PCBs] Re: For chemical etching, what materials are good for resist?
2005-06-30 by Stefan Trethan
On Thu, 30 Jun 2005 20:08:18 +0200, lcdpublishing ... You can try target limited to 100pins, free version. I bought the 700pin
Re: For chemical etching, what materials are good for resist?
2005-06-30 by lcdpublishing
Heck, I would even try milling a board if I could find some free layout software to create the milling code. I am just to darn lazy to go through the process
Question about GBC Laminator at Staples
2005-06-30 by bob_ledoux
While at Staples I noticed the same nine inch GBC laminator that Pulsar sells for $59. Is the Pulsar product modified? Can I buy the Staples unit and save
Duck Laminator for $24 at WalMart
2005-06-30 by bob_ledoux
The $24 Duck laminator at Walmart is a heated unit. I took it apart and it uses a heating element across the top roller. A 5rpm motor drives the roller pair.
Re: [Homebrew_PCBs] For chemical etching, what materials are good for resist?
2005-06-30 by Stefan Trethan
On Thu, 30 Jun 2005 15:06:41 +0200, lcdpublishing ... The pens don t seem to work properly with CuCl, esp. if the pen isn t totally fresh any more (less ink).
Re: For chemical etching, what materials are good for resist?
2005-06-30 by derekhawkins
You can buy resist spray. I think Russ Shaw has a lot of experience in this area. You can Google his name and resist spray or something similar if he or
Re: For chemical etching, what materials are good for resist?
2005-06-30 by lcdpublishing
Yup, aware of that. I am more interested in a liquid of some sort that can be applied to the bare copper prior to etching. ... positive ... matter ... unsure
Re: For chemical etching, what materials are good for resist?
2005-06-30 by derekhawkins
... Should we assume that you are aware of the availability of positive photo resist PCBs with the resist already applied, it s just a matter of peeling off a
For chemical etching, what materials are good for resist?
2005-06-30 by lcdpublishing
Hi All, With regard to chemical etching of boards, what chemicals or materials are good for resist? I know there are resist pens, but I am unsure of what the
Re: [Homebrew_PCBs] Re: EDM PCB mill
2005-06-30 by Stefan Trethan
... That was meant for using it freehand to do board touchup or cutting of stripboard. course it s required, but if it worked in air just as well i would
Re: EDM PCB mill
2005-06-30 by curt_rxr
... Hi Bengt, I ordered most of the parts from Digikey without problems. I used a surplus 18 volt 2 amp transformer I had on hand and wound 12 guage magnet
Re: EDM PCB mill
2005-06-30 by curt_rxr
... wrote: Hi Stefan ( sorry about misspelling your name before -- must be brain fade induced by the summer heat ), ... supply ...
Re: [Homebrew_PCBs] my crude US$170 CNC rig
2005-06-29 by Blue
Hi, Nice to see someone having a go. Why would you gear the stepper motors 1:1 and introduce more backlash in addition to the leadscrew nut? Regards, Terry
Re: CNC::Random musings from a deranged mind
2005-06-29 by derekhawkins
... Horses for courses. Why would someone in the foam cutting business want to pay for machines meeting lathe or mill standards if they weren t required? He s
RE : [Homebrew_PCBs] Re: CNC::Random musings from a deranged mind
2005-06-29 by Robert Hedan
Most machine tools using ball screws go so far as to even put two nuts on with a tab between them to further eliminate backlash to near zero (usually .0002
Re: Re: Re: EDM PCB mill
2005-06-29 by Bengt Sjölund
Hi guys, I´m very interested in building one of these Power Supplies too, but I have problems in finding the parts listed in the drawings from Scott.
Re: [Homebrew_PCBs] Re: CNC::Random musings from a deranged mind
2005-06-29 by JanRwl@AOL.COM
In a message dated 6/29/2005 10:41:40 A.M. Central Daylight Time, derekhawkins@yahoo.com writes: Do you consider 10 mils of backlash in a foam cutting CNC
Abusive discussions
2005-06-29 by Steve
It looks to me like some of you are disagreeing, which is fine, but some of you are arguing for arguments sake. Stop it or take it off list. Flames are not
End of Thread Re: CNC::Random musings from a deranged mind
2005-06-29 by Steve
This disagreement is getting abusive. I think it s time to end this thread. Steve, listowner Homebrew_PCBs
Re: CNC::Random musings from a deranged mind
2005-06-29 by derekhawkins
All you are doing is quoting the specs for the **better** CNC machines out there. Something any idiot can do by going to the manufacturer s websites. It s like
Re: [Homebrew_PCBs] Re: EDM PCB mill
2005-06-29 by Stefan Trethan
... I see. Just this minute i did a small experiment. I built the very simple supply shown in the link you gave for light edm work. Connected it up and used a
Re: CNC::Random musings from a deranged mind
2005-06-29 by lcdpublishing
Okay, Now you are just talking stupid. The reason you would bet the farm that you don t have to bet, is that you don t know what you are talking about. Manual
Re: EDM PCB mill
2005-06-29 by curt_rxr
... Using 1 oz. copper board I can burn a 1 mil dot with one pulse and finish an entire 8 x 11 inch board in under 45 minutes. ... At this moment I m just
Re: CNC::Random musings from a deranged mind
2005-06-29 by derekhawkins
... Can t recall addressing you unless you re also JanRwl@A... The only thing I got from you was that you re an idiot who simply didn t understand backlash as
Re: CNC::Random musings from a deranged mind
2005-06-29 by derekhawkins
... What is the lead accuracy of the best ball screw you can find? What is the typical diameter of a homebrew PCB pad? What is the hole diameter in that
Re: CNC::Random musings from a deranged mind
2005-06-29 by lcdpublishing
As I stated before, I really don t care to debate with you the difference between right and wrong, either you get it or you don t. Chris ... and ... backlash
Re: [Homebrew_PCBs] Re: CNC::Random musings from a deranged mind
2005-06-29 by Stefan Trethan
On Wed, 29 Jun 2005 17:36:34 +0200, derekhawkins ... As soon as you need to compensate something isn t right ;-) 10mil in a foam
Re: CNC::Random musings from a deranged mind
2005-06-29 by derekhawkins
... What does work right mean? There are tolerances in dimensions and targeted positions after motion. Do you consider 10 mils of backlash in a foam cutting
Re: CNC::Random musings , optical mouse
2005-06-29 by javaguy11111
Agilent makes the internals for optical mice. http://www.home.agilent.com/USeng/nav/-536893644.536905699/pd.html ... as a ... the ... (some
Re: [Homebrew_PCBs] Re: CNC::Random musings , optical mouse
2005-06-29 by Stefan Trethan
... In those mice is basically a low-res camera, like 16x16 dots or so. Stripping the guts would not be too hard, the buttons might be useful for zero
Re: [Homebrew_PCBs] EDM PCB mill
2005-06-29 by Stefan Trethan
Hi Curt, So the raster is scanned dot by dot no matter if cutting is needed, and with no regard to if the cutting is finished? That is a good KISS approach,
EDM PCB mill
2005-06-29 by curt_rxr
Hi Stephen, I ll answer your questions from the Electronics 101 thread: ... I used a combo dielectric duct and return ring around the electrode on a EDM
Re: CNC::Random musings , optical mouse
2005-06-29 by mikegw20
... No, I refer to what we would call an optical mouse, no ball only a light. Ripping the guts out of one would be difficult but strapping a small mouse
Re: [Homebrew_PCBs] Re: CNC::Random musings , optical mouse
2005-06-29 by uhmgawa
... Your term of optical mouse is a bit confusing here. If you are referring to a ball-driven mechanical mouse with x/y photo interrupters, yes that is a
Re: CNC::Random musings , optical mouse
2005-06-29 by mikegw20
Thanks all for what turns out to be a lively dicussion. However, as a follow on assuming that I have backlash compensation (by whatever means) Do you know of