... What power CO2 laser do you need for cutting 3mm steel/brass/aluminium? I've got a two-stage pump that can go to 10^-4 torr. I'm designing a cnc x-y...
2044
John Myszkowski
myszka_us2000
Jun 15, 2003 6:57 am
*** Sorry for the departure from the main topic which is "PCB" making in a home environment... but this had to be answered. Anyway, I do believe that lasers...
2045
adam Seychell
adam_seychell
Jun 15, 2003 7:32 am
Hi I've taken some pictures of my new PCB drilling machine, and made them available online at http://home.alphalink.com.au/~seychell/drill_MkII.html Hope the...
2046
Leon Heller
leon_heller
Jun 15, 2003 7:41 am
... From: "adam Seychell" <adam_seychell@...> To: <Homebrew_PCBs@yahoogroups.com> Sent: Sunday, June 15, 2003 8:27 AM Subject: [Homebrew_PCBs]...
2047
Russell Shaw
rj2000_au
Jun 15, 2003 7:55 am
... Looks like a laminate-cutter motor. I'm putting one of those on my x-y machine....
2048
adam Seychell
adam_seychell
Jun 15, 2003 8:04 am
... The motor is a Bosch die grinder (model gss27), 27000 RPM. i.e. you normally put a stone or carbide die in the collet and grind away at metal or whatever....
2049
Russell Shaw
rj2000_au
Jun 15, 2003 8:23 am
... I haven't got a motor yet. I was thinking of using a cheapy motor to drive my own shaft with lower slop bearings. A quick search seems to show...
2050
adam Seychell
adam_seychell
Jun 15, 2003 9:04 am
... Lowest cost I've seen would be something like the trimmers/die grinders you were looking at. That's the first time I've heard of trimmers. The trimmers...
2051
Stefan Trethan
stefan_trethan
Jun 15, 2003 9:31 am
On Sun, 15 Jun 2003 18:58:14 +1000, adam Seychell ... **** 1) motor: yes the proxxon ibe "bohrschleifer" is a good device (eur 100). they have also a english...
2052
twb8899
Jun 15, 2003 2:39 pm
... steel/brass/aluminium? ... I had a Mitsubishi CNC Laser for several years and have some knowledge of how they work. This machine was a model 1212HC with a ...
2053
Russell Shaw
rj2000_au
Jun 15, 2003 3:31 pm
... A laser cutting place near me has an x-y machine about 3m wide, 10m long, and 4-5m high. The laser is in a hut about 2m long, and the laser looked about...
2054
Larry Battraw
lbattraw
Jun 15, 2003 3:39 pm
Hi Adam, I've tried using the cheap red laser diodes from pointers and have had very bad luck. Like Leon mentioned, the spot is not a circle (although you can...
2055
John Myszkowski
myszka_us2000
Jun 15, 2003 8:44 pm
Thanks Tom, That was very informative. I only have a 30" fl lens for my CO2. I have good results with cutting .125" pvc, acrylic and similar materials. I don't...
2056
John Myszkowski
myszka_us2000
Jun 15, 2003 9:02 pm
Hi Adam, Nice little machine. How do you keep the drill bit perpendicular (90degrees) to the PCB? The laser may be a bit too bright after a while. You will...
2057
jankok5
Jun 15, 2003 10:55 pm
I uploaded a picture of my laptop drill press to the photos section. Mr. Moderator, maybe you can move that picture, and the following text, to the files...
2058
twb8899
Jun 16, 2003 4:22 am
John, If the 30" lens is working don't change anything unless you really need a finer cut. The 5" lens will have a smaller kerf width which would help with...
2059
twb8899
Jun 16, 2003 4:58 am
Adam, I like your drilling machine. If you flipped it over and put an optical scope and air clamping foot on it you would have almost the same machine John is...
2060
Adam Seychell
adam_seychell
Jun 16, 2003 5:34 am
... [cut] ... The collets on the industrial tools I've seen are all precision ground hardened steel, exactly as you describe. I haven't measured the round out,...
2061
Stefan Trethan
stefan_trethan
Jun 16, 2003 7:01 am
@adam on more question to tapered roller bearings: are they "encased" by the bearing shells like thrust bearings? so that they are ready to use? i saw some on...
2062
John Myszkowski
myszka_us2000
Jun 16, 2003 2:18 pm
Hi Tom, I wouldn't mind the thinner kerf, also the power/area would increase as well I suppose. The air funnel idea is a good one. I've been thinking of...
2063
twb8899
Jun 16, 2003 10:49 pm
John, The cones on our machine were just long enough to accept a screw in nozzle that put the gas or air output in the focal plane. The screw in nozzle was...
2064
John Myszkowski
myszka_us2000
Jun 16, 2003 11:13 pm
Thanks Tom, That is very useful info. I think I will make a compressed air nozzle for my laser cutter. Do you make PCB's for yourself or commercially? John...
2065
Adam Seychell
adam_seychell
Jun 16, 2003 11:19 pm
... Yes, more parallel to the axial. here are some links that might help. http://www.efunda.com/DesignStandards/bearings/bearings_tapered_roller.cfm here is a...
2066
wanliker@...
wcanliker
Jun 17, 2003 1:33 am
I am new to this group, and would like to ask for some help. I have gone thru the first 1000 subjects, and have a list of PCB drafting downloads to pursue. I...
2067
Hans Wedemeyer
electronic_w...
Jun 17, 2003 1:45 am
Bill, Not sure I understand the "Ladder" thing... Do you mean several circuits on more than on page with transitions between pages ? I can recommend EAGLE....
2068
Ron Amundson
mnphysicist
Jun 17, 2003 2:55 am
I used a plug in for Autocad years ago. It allowed for Ladder Logic drawing, created nets, wire lists, the whole works. If I remember it was around $1000, but...
2069
twb8899
Jun 17, 2003 3:53 am
... nozzle ... John, I spent over twenty years in the printed circuit business as a commercial shop. We made all types of rigid boards up to ten layers and...
2070
Jan Kok
jankok5
Jun 17, 2003 5:11 am
I'm not very familiar with ladder diagrams, but my impression is that they are used to draw circuits made up mainly of switches, relays and loads, and the coil...
2071
Leon Heller
leon_heller
Jun 17, 2003 8:29 am
I just came across this site which has a description of an interesting commercial (and expensive) UV exposure system: ...
