I gotta say I'm pretty happy with the "Tormach Tooling System" - 30 to 35 seconds chip-to-chip isn't bad for a totally manual toolchange
of course I'm getting lots of practice - three changes per part, and I just finished part 13 of a run of 18
3 tool changes per part - JMK your getting off easy - I run out of tool space with a 32 tool ATC... But then the parts I do have like 6 different threads on them.
you don't do them in your basement either
ah true that
heh, your collection of toolholders probably cost more than my machine
water table is only 11 ft down here - basements are rare in my neighborhood - wish I had one.
the only problem with basements is that you can't get heavy stuff into (and out of) them
guy I know here made a stairway hoist to move machine tools and heavy things into his basement
he put 1.5" pipe on each edge of the stairway and had a refrig dolly with grooves wheels that fit the pipes
used a cheap 12V winch to lower the stuff down the track.
hmm, interesting idea
I've used a block and tackle to slide things down the step before
but the rails thing is clever
he worked for FED-x - help build there first package tracking network - think he retired and went to FL
he used to come by to raid our scrap pile - we had a great collection for one off parts.
which would make a better leadscrew? 3/8-24 or 1/4-20?
3/8-24 it would seem but I see a lot of preference to the 1/4-20?!?
if space allows 1/2-20
or better 3/4-10
Noy sure I can go that big, but will check.
bigger will reduce whip during rapids
Considering this will be a pico mill with floppy steppers, I am not sure, beyond a certain point, that would help :).
But, it should be educational and perhaps not cost me much over $100.
Ok for smallish stuff, wood, plastic, foam...
At least I can do something while I contemplate what (if anything) to do with the HF Micro Mill...
go with 3/8-24 - make your nut from brass. - small steppers can run fast but lack much torque so the finer thread works for you
If you were using Nema 23's then you want the larger/corse type thread.
Thanks! IIRC, the steppers are ?NEMA 17? Would have to look again.
[04:39:37] <K`zan> http://www.kaitodenshi.com/english/product/motor2.htm
the -29 one on line 9
Looking for the original link I have to the supplier.
[09:16:18] <sweeper> http://en.wikipedia.org/wiki/Mosfet#MOSFET_structure_and_channel_formation
<-- when this article says current flows from source to drain, are they using classical + to - flow refernce, or electron flow (- to +)?
current flows from + to -
electrons flow from - to +
it is anoying that theory still messes with "conventional" current flow
* sweeper keeps working on trying to get the arduino to drive his mosfets
sweeper: maybe this is of use from pbs http://www.pbs.org/transistor/science/info/transmodernex.html
oh, and physics jokes too http://www.pbs.org/transistor/album1/fun/index.html
I think I got it sorted tho
except, either the datasheet is backwards, or I've got some weird mosfets, current flows seem to be opposite of what the datashee indicates
sweeper: I believe this page is accurate. http://www.physics.udel.edu/~watson/scen103/mos4.html
-- also matches http://www.armory.com/~rstevew/Public/Motors/H-Bridges/Blanchard/nch-brdg-sch.htm
I need a N.American supplier for hi-current co-axial cable like this http://imagebin.ca/view/EPUlyTb.html
used in EDM for 3.3kHZ to 500kHZ. Lo freq used at 300A peak, higher freq at 32A peak.
Any ideas where to look? it doesnt fit any RG-xxx descriptions with 4mm core & shield.
tomp2: if it's not a standard cable, just try emailing the major wire companies with the description
Belden, Alpha, Champlain Cable (local to me :) )
unless you only need 6 feet, in which case you should invest in a pair of bolt cutters and visit the nearest EDM shop ;)
a bit less than 1000 ft for 2 machine :) wiil try emailing the photo as you suggest , thx0
each has 4 runs of near 32 ft, but i buy xtra
anyone have an Hardinge HLV-H?
SWPLinux: I'm going to pick up some things - I have no damn poendant now, as it's no longer running on the laptop.
SWPLinux: gonna plagerize bigjohns idea on a usb gamepad
ok - I didn't get the laptop reference. no USB on the desktop machine?
yes usb on desktop
laptop was using a IBM 10Key pad
SWPLinux: hows the driver board coming along?
I still don't follow then. can't you plug the keypad into the desktop and use it?
SWPLinux: no, laptop only
it's on my list :)
you have the soldering iron, remember? ;)
SWPLinux: email me the drawing
once I draw it :)
SWPLinux: that what I thought you were working on today so I can find a place to put the thing.
yes, it is/will be
SWPLinux: I dont believe you
of course not, considering my past performance ;)
SWPLinux: do you have driver board parts?
not at the moment
I thought you said you were going to pick them up, but I could be mistaken.
I haven't gotten out to get the car or to RS yet
yes, but I haven't yet
it's only 2:25 - plenty of time
well, sort of anyway
what was the spacing?
I still need to talk to them about getting the machine into the room (and when that can happen)
and also find out about your pass
the board holes are 0.1, the terminals are 0.2
the IC is 0.3 wide
what UOM ?
anyone familiar with Hardinge HLV-H lathe?
SWPLinux: mA rating the regulator? and voltage?
not me. there are some folks who have done conversions on HNC and CHNC models
I don't know how close those are
regulator maybe 100 mA to be safe, 5V output, they more or less all go to 35V input
if you have any (7805 or similar), let me know, or I can get them at RS
good night all
see you Alex
JymmmEMC: actually, I think we don't need the regulator. the 2803 doesn't need it (it's just a bunch of transistors, not really any logic in there)
so just the chip, some resistors (maybe a SIP if I can find one), and the terminals (plus the parport header, of course)
jymm: are you planning on using the DIN db25 breakout to connect the stepper drives?
swp I got vr terms din rail
weeee I got a new computer today