Re: RE : [Homebrew_PCBs] my crude US$170 CNC rig
2005-06-27 by Mycroft2152
Stefan, I bet if it used a chicken grill motor, you would fine something good to say about it. :) Give the guy his props, he did something we all are still
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[Homebrew_PCBs] Control box ideas
2005-06-27 by Robert Hedan
Not really. It must drill holes in the right places without breaking the drill too. - ST We have different standards. :D For those of you who are
Re: RE : [Homebrew_PCBs] my crude US$170 CNC rig
2005-06-27 by David McNab
... Yep, but they re not as sexy as PIC16F877-based SilverCards with the standard credit/ATM card form-factor ... Yep, played with that somewhat a while ago.
Re: RE : [Homebrew_PCBs] my crude US$170 CNC rig
2005-06-27 by Stefan Trethan
On Mon, 27 Jun 2005 13:04:26 +0200, Robert Hedan ... Not really. It must drill holes in the right places without breaking the drill too. ST
RE : [Homebrew_PCBs] my crude US$170 CNC rig
2005-06-27 by Robert Hedan
APPLAUSE!!! Raaahhhhhh..... :D WTG dude! So, are you putting a BMW or Acura logo on that? :) Another thought again was to store CNC milling jobs on
Re: [Homebrew_PCBs] conductive ink on paper (or fabric)
2005-06-27 by Leon Heller
... From: Stefan Trethan To: Sent: Monday, June 27, 2005 7:26 AM Subject: Re: [Homebrew_PCBs]
Re: [Homebrew_PCBs] conductive ink on paper (or fabric)
2005-06-27 by Stefan Trethan
On Mon, 27 Jun 2005 07:24:54 +0200, Nick Alexeev ... can you glue on some copper foil? I would fear the ink will break if it is bent. What
conductive ink on paper (or fabric)
2005-06-27 by Nick Alexeev
Folks, Does anyone know of a technique, which allows to make a circuit on paper? Or firm, which specializes in conductive ink? The circuit is really simple.
my crude US$170 CNC rig
2005-06-27 by David McNab
Hi all, Having reached all the mechanical milestones for my CNC rig, and now able to focus purely on the software, I thought I d write it up and stick up the
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-25 by uhmgawa
... Indeed -- I m that machine. My interest wasn t in fully automated pick and place. Rather a tool to allow more accurate manual placement. Even in the case
Re: RE : [Homebrew_PCBs] CNC tools
2005-06-25 by uhmgawa
... Stencils are really a production assembly tool used where volumes of boards are being produced. The amount of solder paste waste/contamination otherwise
RE : RE : [Homebrew_PCBs] CNC drills/routers
2005-06-25 by Robert Hedan
WOW! That dude really did thorough work, his links point everywhere. I haven t gotten to go through all his stuff yet, I just saved everything for future
Re: RE : [Homebrew_PCBs] CNC drills/routers
2005-06-25 by mycroft2152
Thats a great link! Well thought oput and eay to undertand. The schematics are intuitive. Try goolging for a turkish to english web page translator. The pdf
Re: RE : [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-25 by Stefan Trethan
On Sat, 25 Jun 2005 08:39:01 +0200, Robert Hedan ... Then you have a bad supplier. I get about 70% in paper and the rest in plastic strips, and never had
RE : [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-25 by Robert Hedan
All the parts I receive on strips of paper predate the stone age. The glue has turned to amber and the paper is SUPER stiff. I swear I saw a mosquito from
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-25 by Stefan Trethan
... I was thinking you cut off the required amount of parts for the number of boards you intend to make, and put that on the machine. I use the strips
RE : RE : [Homebrew_PCBs] CNC tools
2005-06-25 by Robert Hedan
I ve often wondered why not use a cnc machine to cut a paste stencil? Bascially, its just a couple mil thick piece of plastic sheeting that you squeegee (sp?)
Re: RE : [Homebrew_PCBs] CNC tools
2005-06-25 by Phil
... I m not ... I ve often wondered why not use a cnc machine to cut a paste stencil? Bascially, its just a couple mil thick piece of plastic sheeting that you
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-25 by uhmgawa
... I d imagine tape reels are a non-issue for the type of prototyping under discussion here. As you suggest a far more common scenario is dealing with cut
Re: RE : [Homebrew_PCBs] CNC drills/routers
2005-06-24 by rt2d_user
Hi, You guys might want to check this out http://ogrenci.hacettepe.edu.tr/~b0164043/maximus/ found it tru google. It s something to start with I think. or
Re: RE : RE : [Homebrew_PCBs] CNC tools
2005-06-24 by uhmgawa
... I believe the issue is maintaining the viscosity of the paste medium in order to keep the solder particles uniformly suspended. Reducing the viscosity to
RE : RE : [Homebrew_PCBs] CNC tools
2005-06-24 by Robert Hedan
The syringe should be as rigid as possible so the post-drive flow is minimized. I d choose something like a stainless tube and plunger. The seal on the
Re: RE : [Homebrew_PCBs] CNC tools
2005-06-24 by uhmgawa
... The syringe should be as rigid as possible so the post-drive flow is minimized. I d choose something like a stainless tube and plunger. The seal on the
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-24 by Stefan Trethan
... I thought about it a while ago, but haven t got time/means right now. One of the (i think) better ideas then was to put the components in a pickup area.
RE : [Homebrew_PCBs] CNC tools
2005-06-24 by Robert Hedan
These are the reasons why I am making provisions for extra room for more tools on the head. At first I was thinking of a tool carrousel, but I m not ready for
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-24 by uhmgawa
... Something else to keep in mind is using the XY setup to assist with pick/place operations for SMD devices. Dealing with placement of any significant
Homebrew CNC Wiki ?
2005-06-24 by David McNab
Is there a wiki anywhere for homebrew CNC, especially as applied to PCBs? If not, it would IMHO be a good thing to have. With so many knowledgeable people
RE : [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-23 by Robert Hedan
For those that don t know, you can get those white plastic cutting boards at the local Dollar+ stores. They are cheap and will make decent sliders over metal.
Alternative CNC Ways
2005-06-23 by bob_ledoux
Precise ways are critical to accurate CNC construction. Crankorgan has employed a number of innovative techniques to develop simple ways. I ve come up with a
Re: Drilling station steppers
2005-06-23 by lcdpublishing
... No, I don t think $25.00 for that motor is too expensive. I am saying that your way is not the MOST simple way to create linear motion. A linear motor
Re: Drilling station steppers
2005-06-23 by derekhawkins
... So you consider $25.00 for a 250 RPM gearhead motor with 250 oz-in stall torque expensive too? That s what was paid for the one s I m using. ... allows ...
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-23 by Les Newell
To tell the truth I haven t measured it. If you look closely at bright mild steel the slight roughness tends to be pits in the surface rather than bumps. Skate
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-23 by uhmgawa
... Yes that s true and ideally the rod should be mounted via a continuous support or discrete supports at fixed intervals. Commercial solutions typically use
Re: [Homebrew_PCBs] Re: Drilling station steppers
2005-06-23 by uhmgawa
... Yes. ... They were intended to be a set of alternatives. ... I offered that as a realistic possibility. It is. Not everyone in this forum is able to reach
Re: Drilling station steppers
2005-06-23 by lcdpublishing
... Sure it does, eliminate the ball screw and coupling and switch over to a linear motor - that is much simpler! However, in reality, much more expensive too
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-23 by Les Newell
Hi David, As others have mentioned, al on al is bad. It is ok if it is lubricated but the lubricant will pick up abrasive dust and turn into grinding paste. If
Re: Drilling station steppers
2005-06-23 by derekhawkins
... That s why rigid couplings are preferred and being used in this case. ... Have you really looked at your advice and comments?....They re a hodge-podge of
Re: [Homebrew_PCBs] Re: Drilling station steppers
2005-06-23 by uhmgawa
... A flexible coupling will introduce error as the encoder in this example is on the motor shaft rather than the lead screw. Coaxial alignment of two shafts
Re: CNC mill X-Y tracks?
2005-06-23 by lcdpublishing
Plastic on aluminum is a great bearing surface. I would recomend UHMW (Ultra High Melecular wight) plastic. You can purchase it at www.mcmaster.com and some
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-23 by uhmgawa
... Yes, I d use sections of 1/2 steel drill rod which can be found at machine tool suppliers (ENCO is a good example) and they are likely cheaper than the AL
Re: Drilling station steppers
2005-06-23 by derekhawkins
... I wouldn t consider $15.00 - $30.00 for a gearhead motor expensive. You can get one with encoder for $29.00. ... A fraction of the lead screw backlash.
Re: [Homebrew_PCBs] CNC mill X-Y tracks?
2005-06-23 by Stefan Trethan
On Thu, 23 Jun 2005 15:52:47 +0200, David McNab ... Al on Al is bad, better make plastic on Al or even better plastic on steel. ST
Re: [Homebrew_PCBs] Re: Drilling station steppers
2005-06-23 by uhmgawa
... Depends upon what one is trying to accomplish. A direct coupled gear head approach is certainly straightforward if somewhat of an expensive option. Then
CNC mill X-Y tracks?
2005-06-23 by David McNab
Hi all, I m about 80% of the way towards getting my CNC mill up and running, will eventually be able to feed it a JPEG/GIF/PNG file of the PCB artwork, and it
Re: Drilling station steppers
2005-06-23 by derekhawkins
... A DC gearhead motor is best for lead screw applications as it allows the screw to be driven directly without any complications provided speed and torque
Re: PCBs at home
2005-06-23 by gregben
... contact ... This is true. Here s a simple but long duration experiment. Fill a 8x10 (approximate) tray (polyethylene is good) with water (half full) and
Re: [Homebrew_PCBs] Re: Drilling station steppers
2005-06-22 by uhmgawa
... For lead screw applications I d keep the encoder on the screw. Doing so allows the screw to be driven indirectly and velocity/torque/rotational-precision
Re: Drilling station steppers
2005-06-22 by derekhawkins
... Same place but they re limited to 300 CPR; http://www.usdigital.com/products/e4p/
Re: Drilling station steppers
2005-06-22 by lcdpublishing
Well I guess that won t help anyone else will it, so it s a mute point. ... post ... love ... chip
Re: Drilling station steppers
2005-06-22 by lcdpublishing
Do you have a source for those shaft encoders that are $19.00 each? The cheapest I have found is from US Digital and they are around $35.00 or so. Thanks Chris