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在 2010-03-10三的 23:53 -0600，Jon Elson写道：
> Torsten Koschorrek, the ARM maintainer for RTAI has informed me he has
> an RTAI patch ready for the Beagle Board.
> He is working on a 2.6.29 kernel, but hasn't uploaded the latest docs
> for it yet. That should happen in a couple days, he
> says. So
Torsten Koschorrek, the ARM maintainer for RTAI has informed me he has
an RTAI patch ready for the Beagle Board.
He is working on a 2.6.29 kernel, but hasn't uploaded the latest docs
for it yet. That should happen in a couple days, he
says. So, if anyone wants to try out this patch kit, there i
This is the case with me as well - when one of the interlocks is opened I
lose power and the z axis can drop into the work. I don't actually have to
maintain the exact position so a small amount of movement is tolerable, so
long as the thing doesn't run away - this would allow for a less
sophistic
How to creative the new interface like as interface mini from tkemc, or
repair interface mini again?
Thanks.
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On Wed, 2010-03-10 at 20:54 -0500, Eric Keller wrote:
> I like the wiki page definition of "stupidly expensive" as "$200-300."
> I suspect there are thousands of hobbyist cnc users out there that
> would take exception to that characterization.
> Eric
>
> On Wed, Mar 10, 2010 at 4:32 AM, Sebastie
I like the wiki page definition of "stupidly expensive" as "$200-300."
I suspect there are thousands of hobbyist cnc users out there that
would take exception to that characterization.
Eric
On Wed, Mar 10, 2010 at 4:32 AM, Sebastien Bailard
wrote:
> Interesting!
>
> What brand mill? How fast ca
True, but usually brakes are only applied to keep things from sliding
out of position when power is lost.
If you have power to the stepper motor, it should not require a brake.
For instance I have a brake on my X axis on my slant back lathe so when
power is lost the turret doesn't slide down in
On Wed, 2010-03-10 at 15:42 -0500, Stephen Wille Padnos wrote:
> ... snip
> That could work I think. It might get sticky if there's any motion once
> the turret is in position.
I need to provide a function to stop the carousel at a the proper
encoder value, maybe using PID, so the carousel shou
Kirk Wallace wrote:
> On Wed, 2010-03-10 at 14:11 -0500, Stephen Wille Padnos wrote:
> ... snip
>
>> changer is a carousel. If set true, then it's assumed that max is next
>> to min and you can get from min to max by going "back" one and wrapping
>> around.
>>
>> Hope this helps.
>> - Steve
Le mercredi 10 mars 2010 20:42:26, Dave a écrit :
> You could also just drop a solenoid plunger into sprocket teeth or
> something similar.
>
> Sort of like throwing the proverbial wrench into the works... ;-)
>
> Nema 17 is pretty small stuff.
>
> Dave
>
problem with that is you will stop on
Hi Doug
> for a small stepper motor, like a NEMA 17 I need a small (DC)
> electrically driven lock that I can attach to the shaft such that
> when the power is turned off the shaft is locked in place.
Before installing a mechanical brake, try short-circuiting the motor
coils. The motor will be
Le mercredi 10 mars 2010 20:27:06, Chris Reynolds a écrit :
> Anyone have any experience in using EMC with Linistepper driver boards? I
> was wondering about the settings to use in EMC and was just curious if
> anyone else had used them and would be willing to share their experiences
> and setti
On Wed, 2010-03-10 at 14:11 -0500, Stephen Wille Padnos wrote:
... snip
> changer is a carousel. If set true, then it's assumed that max is next
> to min and you can get from min to max by going "back" one and wrapping
> around.
>
> Hope this helps.
> - Steve
Cool. Thanks. The plan was to assi
I'm not sure there is such a thing; but I'm looking for some "low cost"
linear servo motors?
At least it needs to be substantially cheaper than Parker's linear servos.
I'm looking for one with about 2" of stroke, 20 lbs of force and
accuracy to .002 inches.
So does anyone have any experience
You could also just drop a solenoid plunger into sprocket teeth or
something similar.
Sort of like throwing the proverbial wrench into the works... ;-)
Nema 17 is pretty small stuff.
Dave
On 3/10/2010 2:32 PM, yann wrote:
> Le mercredi 10 mars 2010 18:11:13, doug metzler a écrit :
>
>> fo
Le mercredi 10 mars 2010 18:11:13, doug metzler a écrit :
> for a small stepper motor, like a NEMA 17 I need a small (DC) electrically
> driven lock that I can attach to the shaft such that when the power is
> turned off the shaft is locked in place.
>
> Do any of you folks know of such a device?
Anyone have any experience in using EMC with Linistepper driver boards? I was
wondering about the settings to use in EMC and was just curious if anyone else
had used them and would be willing to share their experiences and settings.
Chris
Kirk Wallace wrote:
> On Wed, 2010-03-10 at 13:02 -0500, Stephen Wille Padnos wrote:
>
>> Kirk Wallace wrote:
>>
>>> I need a C algorithm that solves the shortest distance to a carousel
>>> tool (encoder wraps at 0). I can solve the distance from the current to
>>> the target tool with th
On Wed, 2010-03-10 at 13:02 -0500, Stephen Wille Padnos wrote:
> Kirk Wallace wrote:
> > I need a C algorithm that solves the shortest distance to a carousel
> > tool (encoder wraps at 0). I can solve the distance from the current to
> > the target tool with three tests, CW distance CCW distance, t
I've updated the documentation about this. The new text is:
Program G96 D- S- to select constant surface speed of S feet per
minute (if G20 is in effect) or meters per minute (if G21 is in
effect). The maximum spindle speed is set by the D- number in
revolutions per minute. When us
Thank you for your responses, a search for "brake" definitely produced more
results than I was getting before :-)
Kirk, I think you're right that I will have to design my own because the
amount of space I have available behind the stepper is about 0.360" and it
looks like the available brakes are
I need a C algorithm that solves the shortest distance to a carousel
tool (encoder wraps at 0). I can solve the distance from the current to
the target tool with three tests, CW distance CCW distance, then test
for the shortest, but it seems I should be able to do this in one test.
I suspect the so
Kirk Wallace wrote:
> I need a C algorithm that solves the shortest distance to a carousel
> tool (encoder wraps at 0). I can solve the distance from the current to
> the target tool with three tests, CW distance CCW distance, then test
> for the shortest, but it seems I should be able to do this i
On Wed, 2010-03-10 at 09:11 -0800, doug metzler wrote:
> for a small stepper motor, like a NEMA 17 I need a small (DC) electrically
> driven lock that I can attach to the shaft such that when the power is
> turned off the shaft is locked in place.
>
> Do any of you folks know of such a device? I'
On Wed, 10 Mar 2010, doug metzler wrote:
> Date: Wed, 10 Mar 2010 09:11:13 -0800
> From: doug metzler
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: [Emc-users] stepper motor lock mechanism?
>
> for a small stepper motor, like a NEMA
for a small stepper motor, like a NEMA 17 I need a small (DC) electrically
driven lock that I can attach to the shaft such that when the power is
turned off the shaft is locked in place.
Do any of you folks know of such a device? I've been googling around but I
haven't been able to come up with t
Rudy du Preez wrote:
> I tested a Nema 23 two stack stepper (bipolar) in closed loop with EMC2
> lately. The stepper driver is a Gecko 251 at 45V and 3A. The encoder is an
> AMT102 connected TTL to a MESA 5i20 (P2) through a 7i33. The G251 step/dir
> signals are connected directly to the 5i20 (P4).
On 10 March 2010 11:26, Andy Pugh wrote:
> V = (H.A)/s.
>
> If we solve for phase current then at 2000rpm you only have enough
> voltage to push a peak current of 1.6A through the windings. Perhaps
This isn't exactly true... I was looking at the definition of the
Henry, not the equation for ind
On 10 March 2010 08:49, Rudy du Preez wrote:
> The motor runs very smooth and the following error is maximum about 6 counts
> at high speed. The counts per rev is 2000. The highest speed is about 2000
> rpm above which the motor suddenly stalls and then a fault error is given.
>
> Is this maximum
Interesting!
What brand mill? How fast can you move the table around? Also, what
are your motors, electronics, etc. like? (I'm trying to pin down some
known-good mill-and-motor-and-electronics toolchains to recommend to
our users. I'm also worried that mills make bad bootstrap RepRaps
because i
I am currently adding a RepRap head to my EMC2 controlled desktop mill.
Using serial link to control head temperature but feed rate will be
controlled via EMC2.
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I tested a Nema 23 two stack stepper (bipolar) in closed loop with EMC2
lately. The stepper driver is a Gecko 251 at 45V and 3A. The encoder is an
AMT102 connected TTL to a MESA 5i20 (P2) through a 7i33. The G251 step/dir
signals are connected directly to the 5i20 (P4). The objective was to see
how
On March 9, 2010 05:19:32 pm Andy Pugh wrote:
> On 9 March 2010 20:45, Paul Midgley wrote:
> > The reason I asked the question is that the Reprap project at
> > www.reprap.org, do exactly what I suggested. Unfortunately their project
> > is making items from plastic in a 3D prototyping machine tha
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