[00:42:25] <skunkworks> http://www.cnczone.com/forums/showpost.php?p=331415&postcount=16
[00:42:50] <skunkworks> http://www.cnczone.com/forums/showpost.php?p=331415&postcount=16
Hi jepler. how the zenbot? are you 'centered' with it ;)
har har har
hm, here's a surprise (to me): I have G42 / cut cut cut / G40 / G0 Z1
on that last Z1 move, X and Y move too
now I understand what that's about (X and Y move to the commanded position rather than the compensated position)
but that sure didn't cross my mind when I wrote the gcode
otherwise you may not ever get back on the actual path
imagine no more X words in the program
so should I have written G0 Z1 / G40 instead?
(I fixed that recently)
"move out before comp off"
depends what you want :-)
if you like gouges, I'd leave it
yep, if you want to move straight up, you must keep comp on
don't turn off comp until *away* from the part
I thought the spec said that the next move in the XY plane would turn comp on/off
I should look at that again though
if that's what the spec says I'll sure whine at chris to fix it :-P
fix the spec?
don't turn off comp while touching the part
it's not a problem just with Z moves
anyway, here was my program: http://emergent.unpy.net/index.cgi-files/sandbox/fanny.ngc
I didn't notice the unexpected move until I was looking at the preview plot later, so I can confirm that this time I lucked out
interesting, what is it?
the extra area cut would be outside the part, so the only real problem is that it crashed the cutter into the material at rapid speeds
it's an adapter from 80mm to 60mm fan -- the enclosure takes an 80mm fan, the 24V fan I have is 60mm
thanks -- the entry moves I worked on; the exit moves I wasn't paying attention to
(machining a real, functional part)
without anyone there to hold my hand
we'll make a machinist of you yet
yeah, one of the few who can use cutter comp
I'm a machinist - I have 1-2-3 blocks
that's how you tell, right?
oh that's what you should have ordered me from that website
they shipped that order already!
no - I have 1-2-3 blocks, so that can't be the only determinant
[01:14:37] <skunkworks> http://www.spiritone.com/~english/humour/aolcd.html
doh, I didn't take a picture of the part before I installed it
guess you have to remove it now
it looks like hell, because the tape I used to hold it down ripped off irregular parts of the reflective CD surface
oh it's done already?
yeah I did it earlier
make another one and fake it
made from a cd? heh
I don't have a lot of stock
did people see this earlier? http://www.mightywombat.com/toons/numbers.gif
you made it out of a CD?
I got a chuckle out of it :)
jmkasunich: yeah, why not?
* jmkasunich takes back jepler's machinist creds
gotta cut METAL!
with a dremel?
send gold - it's soft
yay another bug squashed
reminds me of a dilbert - when the pointy haired boss say "we are now paying bonuses for every bug you fix" wally say "wooHoo I'm writing my self new boat"
unfortunately that second part never happens to me
[02:00:10] <jepler> http://www.ourlocalstyle.com/images/uploadImages/2006/05/13/dilbert_bugFixMinivan.gif
"boat" would have been better than "minivan", I think -- "minivan" seems practical
he's a geek - it should be practical
though wally's not the type to have a yacht
who the hell decided how to spell "yacht", anyway?
[Probably obsolete Norwegian jagt, from Middle Low German jacht, short for jachtschip : jagen, to chase (from Old High German jag?n) + schip, ship.]
oh well that explains it real good
ja, verry gut eksplanation
Ok, so how about something expensive but which is likely to actually be of very little use to the purchaser?
I may have been para-phaising
jepler, no, only some of us buy them and don't get around to making them useful
which reminds me. I wonder what the deal is with those servo mounts
I bet a lot of bridgeports bought for retrofit never make useful parts again
sad as that seems
heh. I only know of one at the moment (other than those for sale on ebay with various sob stories)
Don't say that - I will not believe it.
I wonder why my paypal payment is "pending"
same reason my ups shipment "experienced an exception"
yeah - I always get a kick out of those
unless my packages are delayed by 3 days because of it
cnc is neat. (I peck-drilled 4.5 inches deep, .1 inch at a time)
it can do that without screwing up or getting bored
yeah. I can usually do one or the other
though milling machines are really fantastic drill presses, so it's pretty easy to make good holes
I made supports for the bridgeport - they're 6"x3/4" steel bars, 36" long
each needed 2 large holes, for the bolts tha hold down the machine
this was a .203 hole down into the edge of .375 plate too
plus 12 smaller holes for the 3 casters per bar
cool - doing doweling in steel ;)
(why do you need to hold down the machine?)
hey - that would be pretty cool actually - make a table from solid metals of different types, like nice multi-grained wood tables
it would be a little heavy
well, I think it'll be coming off the casters slightly before (or slghtly after) I get it running as a CNC
ideally under my power, not its own
I like brass and aluminum together, but both can get a bit tarnishy
coat in zipwax, just like wood ;)
I got a couple 5' (?) crowbars - very easy to move the machine without wheels
yep. and round bars for rolling are extremely helpful
they make great gear pullers too, I found
for the fifty or so pulleys I had to pull off the top, I could just hang the two bars on opposite sides and then thump the shaft
maybe it was only about four pulleys, I lost count
was that to get it inside, or did you take apart the head?
one was a huge pain to get back on
that's one nice thing about hte manual mills - you can turn the head upside down and rest it on the table when you're going through the short garage doors
yeah but that'll never be rigid like this is
though if I ever need to change the drawbar, I'm in trouble
those look really spindly to me
[02:54:48] <cradek> http://timeguy.com/cradek-files/emc/bridgeport/DSCN6321.JPG
here's the "lowered" pic
sigh - nice ballscrew concentric with the spindle (from what it looks like)
you can see where the previous owner greased ... the top of the motor
yeah it's a nice setup
ok - I was wondering what that icky-poo was there for
I removed about a quart of grease that wasn't doing anything any good
have you cleaned out the knee?
unless the belts need grease...
get a dumpstrer
I don't know how it was possible to get that much crap in the knee, when it looks mostly sealed
what quill travel will you have?
I think it'll be very close to the full 5"
the Z motor mount is an Anilam, si I'm hoping it was well designed
for this project I want to drill a 6"+ hole - it will be interesting
not hard really
long drill and knee movement
just crank the knee up a couple inches
that's where a servoed knee would come in handy
servo + CNC
I sure see why people motorize knees - that damn thing is heavy
it's only ~1000 pounds (plus clamps and workpiece)
maybe I should get a longer handle - I know I've seen them
and you get to crank ~4 feet around per 0.1", so you're getting a good deal on reduction
maybe the gibs are too tight or something
I'm trying to get a guy who knows what he's doing to come look at it
sadly it needs some scraping
that is a bummer
but at least you get to learn something new
or pay someone to do it ;
yeah - who to pay to get scraping done right
that's a damned good question. it sounds like it may be a dying art
it'll be alive as long as we have manufacturing in the US, plus about one life span
so, not dead yet
I thought a lot of what used to be done with scraping is now done by grinding
oh, I guess I don't know
me either - could be a misperception on my part
I read an interesting thread on practicalmachinist about it
if I had the tools I'd be tempted to try to fix it. So, it's probably good I don't.
you don't run across a dovetail standard every day
heck I don't even have a surface plate
if I did, *maybe* I could make a dovetail standard of some kind
it's the shipping that gets you
my vise cost $80 to ship here, and it was only 60? lb
like $35 for a 12x18 surface plate
I got it from MSC
what is that, 100lb?
not that much, but it's heavy
just a couple inches thick?
it's more than a vise and less than a rotary table
and heavy, but I think it was shipped UPS
wow. they're $117 each now. I could swear I didn't pay anywhere near that much
taht's over 100 pounds
yeah I suppose it is
48x96x16 tolerance +- .0004
I was surprised the tolerance was so bad (looking at the Starrett 36x48 @ +/-0.00015)
that's why they have nice soft covers for those hunks of stone
hey I cut a 7.000 x 4.750" piece of aluminum
on a bandsaw?
if you measure it in the right places, that is
it's nice to be able to cut really biug hunks of metal, isn't it?
it's 4.750 on one end and 4.748 on the other, haven't checked to see where the problem is yet
probably more wear
or, the cheap vise isn't very flat (?)
cheap vise built into saw?
no, cheap vise bolted to the milling machine
I hear bridgeports tend to wear in arcs since the table is heavy and it overhangs quite a bit
I've heard that they wear in the center because that's where most motion occurs
probably both effects are real
you can definitely tell that the ovehang issignificant when removing/replacing the table
why did you decide to start with a manual machine?
well, I have a friend who's been using Bridgeports since he was a kid (machinist grandfather)
he's got two maual machines, one of which has been converted to CNC
hmmm - how much of that did you get?
SWPadnos_ is now known as SWPadnos
enco surface plates are very inexpensive: 12x18 $24.95
I wionder if I got mine from Grizzly instead of MSC
and they really do ship it free if you spend $50
anyway - my friends recommendation was to get a good manual machine instead of a CNC, since used CNC machines were likely to have been in heavy production environments, and would exhibit more wear
that is probably very true
fenn: I've never seen free shipping - do you have to do something special to et it?
bandsaws never cut perfectly square, .002" over 5" sounds pretty good to me
oh, they send you some spam with a secret code
its usually posted in rec.crafts.metalworking if you dont get it
grizzly or enco has free shipping over $50 anyway
The September 07 ENCO Promo code is: WEBRN97 Free shipping for order of $50 or more. I think it expires October 1st 2007
heh here's a neat idea: one of the $14 mini impact wrenches as an automatic drawbar tightener/loosener
there are plans for a unit like that somewhere
or the guy is selling the units - maybe on eBay
btw you cant make a table out of chunks of different metals because of galvanic potential differences. one metal would oxidize like crazy
you'd have a generator table
so, put that one on the bottom i guess
tho my steel/aluminum lathe seems to be holding up fine...
or leave it galvanic, use the potential for touch probing
fenn: thanks for that code. I ordered a surface plate (and a collet I need, to make the total > $50)
I got "Grade A" which is +-0.00005
i have a surface plate but it's not very convenient. i usually end up using a piece of plate glass
good morning skunkworks
Good morning jepler
cradek_ is now known as cradek
bizarre. In my webserver error logs are two requests for the URL http://www.loanscandyloans.com/php/test.php?...
well. this is annoying
there's no loader program for the 5i22, and the mesa site is down
hmmm. any thoughts on what the default configuration should be for a 5i22?
I'm thinking two connectors used for motors (total of 8), and two connectors for digital I/O
that's fine by me
is it just me, or is mesanet down? I don't seem to be able to find it in DNS even (which points to a local problem)
ok, interesting. I can't look it up or get there. I suppose it may be time for me to check that static on line 2
Please hold while we connect you to the internet..
I'm sorry. That number has been disconnected