Re: [Homebrew_PCBs] Re: bits (and spindles)
2003-01-20 by JanRwl@AOL.COM
In a message dated 1/19/2003 4:29:47 PM Central Standard Time, ... Yes, Tom, I have SEEN a 4-quill drill stacks of 7-high blanks, and the peck rate was two
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Re: bits (and spindles)
2003-01-19 by twb8899 <twb8899@yahoo.com>
Dave and Jan, Yes, these big machines took lots of air to run them. The air requirements are because of the air bearing table and spindle sleeves. Each axis
Re: [Homebrew_PCBs] Re: Speed and Feed question
2003-01-19 by Zoran A. Scepanovic
Hello twb8899, 19. January 2003, 21:48:33, you wrote: ttyc Zoran, ttyc There are calculations we used for the various feeds and speeds but ttyc most of this
Re: Speed and Feed question
2003-01-19 by twb8899 <twb8899@yahoo.com>
Zoran, There are calculations we used for the various feeds and speeds but most of this was done automatically by the machine. What you need to know is the
Re: [Homebrew_PCBs] Re: bits (and spindles)
2003-01-19 by JanRwl@AOL.COM
In a message dated 1/18/2003 6:17:44 AM Central Standard Time, ... Tom: TWO points: 60,000 and 80,000 RPM? Were these high frequency motors, or brush
Re: bits (and spindles)
2003-01-19 by Dave Mucha <dave_mucha@yahoo.com>
I am surprised at the air consumption and that they would use electric motors for drilling. the motors would be much bigger than a similar power air motor.
Speed and Feed question
2003-01-18 by Zoran A. Scepanovic
Hi all, I m on the way of making PCB drillin machine, and I would like to get some info on the spindle speeds and feed rates for different drill diameters
Re: bits (and spindles)
2003-01-18 by twb8899 <twb8899@yahoo.com>
Jan, The big professional drilling machines all use electric spindles but some have air bearings for rotation. These air bearing spindles have no ball bearings
Re: bits (and spindles)
2003-01-18 by twb8899 <twb8899@yahoo.com>
Adam, Everything you mentioned about etch back and desmearing is correct. In our process we used new drill bits for multilayers to mainly limit the amount of
OT infrared animal detection
2003-01-18 by Ron Amundson
I noticed a post in the archives concerning the design of a infrared animal detector. Someone had posted something about IR photodiodes. When one needs to
sodium persulfate ph stabilizati
2003-01-18 by Ron Amundson
... spent ... used ... but ... huge
Re: [Homebrew_PCBs] Cleaning/Recovering a soaked and corroded PCB
2003-01-16 by Russell
... There s an electronics detergent called safewash 2000 that makes soldering really shiny, removes flux, and other residue. RS Components or Farnell have
Re: [Homebrew_PCBs] Re: bits (and spindles)
2003-01-15 by JanRwl@AOL.COM
In a message dated 1/15/2003 2:29:33 AM Central Standard Time, ... Wow! Thanks, Tom! That is VERY useful to us hobby-folk! Yeah, I watched a 4-quill CNC
Re: [Homebrew_PCBs] Re: bits (and spindles)
2003-01-15 by adam Seychell
... [deleted other interesting paragraphs] ... Thanks Tom for sharing your knowledge with the group, although I have couple of questions. What is different
Re: [Homebrew_PCBs] Cleaning/Recovering a soaked and corroded PCB
2003-01-15 by adam Seychell
... Its pointless applying cleaner AFTER rinsing with distilled water. Cleaner residue is the killer so you want to rinse with water last. If you have copper
Re: Cleaning/Recovering a soaked and corroded PCB
2003-01-15 by twb8899 <twb8899@yahoo.com>
Scrub the board with dish washing detergent and warm water. Then shake off the excess water and dry the board in an oven set to approximately 150 F to 200F.
Cleaning/Recovering a soaked and corroded PCB
2003-01-15 by ghidera2000 <ghidera2000@yahoo.com>
I have a 24vac timer that got soaked pretty good. Tons of corrosion on the resistors, diodes etc. The four ICs also have smooth glassy looking areas over some
Re: When to use large ground planes
2003-01-15 by ghidera2000 <ghidera2000@yahoo.com>
Thanks Dave, good explanation. I was looking up HF topics and saw how high frequency tends to make the electrons move only at the of a conductor. The wider the
Re: [Homebrew_PCBs] Re: bits, T-Tech use
2003-01-15 by Alexandre Souza
... Wow! How much does a machine like this costs? :o)
Re: bits (and spindles)
2003-01-15 by twb8899 <twb8899@yahoo.com>
We always drilled a maximum depth of five times the drill diameter. This was the general rule of thumb for carbide bits. Most of the time we drilled a stack of
Re: T-Tech Quick Circuit
2003-01-14 by robgrzesek <robert.grzesek@mattel.com>
I ve used one for 3 years now. It s great- we save a ton of time over building a board by hand. The software is now Windows based and is very easy to use.
Re: bits, T-Tech use
2003-01-14 by Dantrol
Dave: The T-Tech is used to make prototype boards to prove the circuit or for my use. I do not attempt to plate the through-holes. I solder on the both sides
Re: When to use large ground planes
2003-01-14 by Dave Mucha <dave_mucha@yahoo.com>
I can t offer all the reasons, but high frequency stuff will effect the low frequency stuff. you have 2 choices, physical seperation or an antenna that will
When to use large ground planes
2003-01-14 by ghidera2000 <ghidera2000@yahoo.com>
I often see ground traces expanding out to cover large areas of PCBs. I have a half-idea that this is to clean up the ground when using analog parts, is this
Re: Bits
2003-01-14 by Dave Mucha <dave_mucha@yahoo.com>
Hi Jan, I picked up the T-tech unit today and a bunch of bits. even a dozen 1/16 router bits that are designed to cut the board for isolation or just cutout
Re: [Homebrew_PCBs] Re: Bits
2003-01-14 by JanRwl@AOL.COM
In a message dated 1/13/2003 9:24:07 AM Central Standard Time, ... Check this other member s input on this: there is a good description of sharpening
Re: Bits
2003-01-13 by Dave Mucha <dave_mucha@yahoo.com>
Hi Daniel, Can you offer any review of the T-Tech macnhine ? I just got one and unloaded it from the car. I m excited, but have no idea where to start other
Re: [Homebrew_PCBs] Re: Bits
2003-01-13 by Brian Pitt
there is a good description of sharpening engraving cutters in the navy Machinery Repairman manuals available in the files section of this group over here
RE: [Homebrew_PCBs] Re: bits
2003-01-13 by Brian Schmalz
We have a PCB layout guy here at work that worked most of his life at a PCB house before working for us. He says that all those reconditioned bits are
Re: Bits
2003-01-13 by Dantrol
Jan: You stated that it is possible to salvage broken carbide drills by grinding an engraver s tip on the broken end and that this new tool could be used for
Re: [Homebrew_PCBs] T-Tech Quick Circuit
2003-01-13 by Wolfgang Maier
Dave, We have had one here for about the last 6 to 8 years and it has been working hard and faithfully for that time. It is being replaced by the
Re: [Homebrew_PCBs] Re: bits
2003-01-12 by JanRwl@AOL.COM
In a message dated 1/12/2003 5:04:39 PM Central Standard Time, ... Dave: GOOD questions, and ones I think worthy of discussion here ! I have wondered this
Re: bits
2003-01-12 by Dave Mucha <dave_mucha@yahoo.com>
Hi Jan, yes, the box of 50 solid carbid, reconditioned bits in various sizes. My Old Scott nameplate engraver uses a half flute single edge for cutting and
Re: [Homebrew_PCBs] bits
2003-01-12 by JanRwl@AOL.COM
In a message dated 1/12/2003 12:39:07 PM Central Standard Time, ... Dave: You didn t mention if these are solid-carbide, diamond- plated , or what. Carbide
bits
2003-01-12 by Dave Mucha <dave_mucha@yahoo.com>
Hi, I went thru the list and found some comments on bits for etching. It seems like the box of 50 burrs from Harbor Freight are the best bang for the buck, IF
Re: auto trax
2003-01-12 by gmfoster2000 <garry.foster@verizon.net>
http://www.kov.com/Support/Download/download.html Garry
auto trax
2003-01-12 by norman doty
hi there, who has the link to the free autotrax pcb design software. could they please reprint it below? i cant seem to find my download, pittyfull. but im
T-Tech Quick Circuit
2003-01-12 by Dave Mucha <dave_mucha@yahoo.com>
Hi all, I think I will be getting a Quick Circuit and wanted to see if anybody has and expericance to encourage me or to tell me to fa-ged-a- bot-it. anything
Re: Advice for Newbie
2003-01-11 by gmfoster2000 <garry.foster@verizon.net>
Steve Have you thought about starting a dbase list. It would be good to have Toms offer where it was easily found. Garry ... probably ... etching. ... has ...
Re: [Homebrew_PCBs] Re: Inkjet film - Inks
2003-01-09 by Les Newell
Iwouldbe interested. Any information would be very welcome. Thanks, Les ... what gave ... any ... and has ... Epson ... the ... was a ... brands) I ...
Re: I have etching down pat now - Many thanks! New Q - dielectrics
2003-01-08 by ghidera2000 <ghidera2000@yahoo.com>
... humid Ok ok, not *IN* the pool, just in the building that HAS the pool in it :D
I have etching down pat now - Many thanks! New Q - dielectrics
2003-01-08 by ghidera2000 <ghidera2000@yahoo.com>
Particularly to Adam for the suggestion of the multi-exposure board idea. Did that and now I ve just finished my third perfect board (6 minutes is the best for
Re: [Homebrew_PCBs] Re: Inkjet film - Inks
2003-01-08 by adam Seychell
A while ago I tested various inkjets and transparency films for fining what gave the best quality phototmask. The Epson Stylus with epson ink and epson
Re: Inkjet film
2003-01-08 by ghidera2000 <ghidera2000@yahoo.com>
Printer manufacturers and retailers don t make money on the printers, they make their money on the consumables (computers are the same with peripherals and
Re: [Homebrew_PCBs] Re: Inkjet film
2003-01-07 by JanRwl@AOL.COM
In a message dated 1/7/2003 8:23:50 AM Central Standard Time, ... Jed: Did you HAVE to, or did the printer just PROMPT that the cartridge was running low?
Re: [Homebrew_PCBs] Re: Inkjet film
2003-01-07 by Russell
... When printing on to epson transparency, the genuine ink makes all the difference.
Re: Inkjet film
2003-01-07 by nf1z <gweare@attbi.com>
On a similar note, I recently used two different inkjet printers, an Epson 600 and an HP 625C, to print on decal paper. The similarity is that you want dense
Re: [Homebrew_PCBs] Thoughts on where I went wrong? (1st pcb attempt)
2003-01-05 by Randy Knutson
I had the same problem when I first started out, your water shouldn t be hot or the developer will peel right off. If I remember correctly it should never go
Silk screen
2003-01-04 by Salam <salamgobran@hotmail.com>
Hi Do you know the steps to make a PCB using silk screen ??
Re: Inkjet film
2003-01-04 by Ted Inoue <ted@soleburymountain.com>
Hi, I gotta disagree with the last statement - I ve tried several inkjet printers and two laser printers and the inkjets blow away the lasers for this