On 18 August 2010 00:30, Tom Smith tomsmith...@hotmail.com wrote:
Is there any way to true single-point thread trap threadforms?
I would expect so. I have cut coarse (4mm pitch) threads using a
broadly similar approach and G76.
The threading cycle starts from the initial position, so you can
On 17 August 2010 23:36, Steve Blackmore st...@pilotltd.net wrote:
Returning the tool along a line that skims the thread peaks does not
seem that valid to me.
Skimming the top at 0 removes flash edges, a common technique.
Unless the rapid return is a lot slower than the threading pass (which
Anybody heard from Gene H. lately? He usually posts every day, and I
haven't seen one of his posts in a while. Pinging Gene - if'n yer out
there, pipe up...
Mark
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On Wednesday, August 18, 2010 09:31:00 am Mark Wendt did opine:
Anybody heard from Gene H. lately? He usually posts every day, and I
haven't seen one of his posts in a while. Pinging Gene - if'n yer out
there, pipe up...
Mark
You rang?
I have been busier than that famous one legged
Anybody heard from Gene H. lately? He usually posts every day, and I
haven't seen one of his posts in a while. Pinging Gene - if'n yer out
there, pipe up...
Mark
You rang?
I have been busier than that famous one legged man in an ass kicking
contest, trying to fix all the damages
On Tue, 2010-08-17 at 18:11 -0400, Don Stanley wrote:
... snip
Did you recognise it is a CNC converted mill that I
wanted to move to EMC2?
Thanks again
Don
I still contend that encoder feedback on a stepper system has no proven
advantage, unless you have a very special stepper
On Wed, Aug 18, 2010 at 08:38:40AM -0700, Kirk Wallace wrote:
I still contend that encoder feedback on a stepper system has no proven
advantage
I saw a machine at CNC Workshop that was set up with encoders and
steppers. It still did step generation in position mode, exactly as
it would
I disagree... If I had high res scales available that could keep up
with the slew rates of the axes, I would try to incorporate them into
the system.
They could compensate for pitch errors in the screws or worn screws. I
still think that any backlash may still cause big problems, but you can
I have been working on a furnace fan with a four speed AC induction
motor. It came to mind that a four speed motor might be handy as a
spindle motor, but when I powered the motor up on the bench, with no
load, the four speeds seemed to be the same. My guess is that the
different speeds are
The one big advantage is stall recovery. You can just turn the
machine back on after the crash and emc still knows where you are. (no
re-homing needed).
sam
On 8/18/2010 10:38 AM, Kirk Wallace wrote:
On Tue, 2010-08-17 at 18:11 -0400, Don Stanley wrote:
... snip
Did you recognise it is
On Wednesday, August 18, 2010 12:16:57 pm Mark Wendt did opine:
Anybody heard from Gene H. lately? He usually posts every day, and I
haven't seen one of his posts in a while. Pinging Gene - if'n yer
out there, pipe up...
Mark
You rang?
I have been busier than that famous
On Wednesday, August 18, 2010 01:05:31 pm Kirk Wallace did opine:
I have been working on a furnace fan with a four speed AC induction
motor. It came to mind that a four speed motor might be handy as a
spindle motor, but when I powered the motor up on the bench, with no
load, the four speeds
The motor/drivers from a modern front load clothes washer is a very
versatile piece.
just saying.
Cal
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Hi Dave, Kirk, Chris, Sam
A serious thanks for your input.
I'm going to outline my thinking below and would be grateful for
your feedback, pro or con.
Years ago I converted a new JET Mill (Bridgeport knee knock off)
to CNC. The Ball Screw I used (Rockford) was not the stiffest
thing on the
Hmmm - backlash isn't going to get any better using scales - and the
machine setup is impossible at best.. backlash is bad bad bad..
as far as your stepper .2 and .1? Direct coupled?That
must be taking into account the micro stepping? You cannot depend on
micro stepping
Gentlemen,
I have not heard much about an EMC Fest other than the CNC Workshop. I am
willing to host a meeting here again this year. I just need a week or two
notice.
I have some projects to be worked on. If someone has a project they need
some machining done on we have machines to use here.
On 18 August 2010 20:15, Don Stanley dstanley1...@gmail.com wrote:
I am getting a lot of backlash (apparently flexing the Y arm) during
static moves and who knows under load.
I am not sure that is classical backlash, and might not be as
difficult to deal with.
It really seems to me that using
One significant part of this that is a real pain is that the parser
converts all text to upper case early in the process.
Ken
On 08/17/2010 02:55 PM, Igor Chudov wrote:
I am totally in love with truetype-tracer and already engraved a bunch
of stuff. I wish I had a faster spindle, but I
On Wed, Aug 18, 2010 at 06:42:23PM -0400, Kenneth Lerman wrote:
One significant part of this that is a real pain is that the parser
converts all text to upper case early in the process.
Happily, it doesn't convert comments!
% cat f.ngc
(SYSTEM,echo Hello world!)
m2
% rs274 -g f.ngc
[...]
On Wed, Aug 18, 2010 at 04:54:53PM -0500, Stuart Stevenson wrote:
Gentlemen,
I have not heard much about an EMC Fest other than the CNC Workshop. I am
willing to host a meeting here again this year. I just need a week or two
notice.
Sounds really fun - lots of interesting projects - count
Don Stanley wrote:
- Stepper Motors are 4000 inch pound torque direct coupled to the
ball screws and knee lift shaft.
Are you sure of this number? That's 333 Foot-Pounds of torque, not bad
for a V8 car
engine. Assuming a 5 TPI ballscrew, you'd get 126000 pounds of linear
force on
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