On Monday 13 July 2020 22:44:37 R C wrote:
> well, I can calculate what the speed needs to be, also I can actually
> "observe" it too.. by pointing the telescope at a star and see how
> much the deviation is. I have encoder to check the actual speed of a
> shaft.
>
> I found some information i
On Mon, Jul 13, 2020 at 7:28 PM R C wrote:
> Interesting,
>
>
> but I already have the motors, and the gears are on their way. What
> I was really looking for is how to drive the stepper-drivers, he DM542
> series ones.
>
Do you have the user manual for the DM542? If not look at the top t
On Monday 13 July 2020 20:12:09 Chris Albertson wrote:
> Displacement of the cross slide while cutting a hex head is
> proportional to the sin of the spindle angle. Very much like the
> height of a piston is proportional to the angle of the crank
Yes, but for a siggen's sine output, one would ne
yup exactly, actually in a way so I can point at things that you can't
really see but would need longer exposures for.
On 7/13/20 9:28 PM, Chris Albertson wrote:
On Mon, Jul 13, 2020 at 8:02 PM Dave Matthews wrote:
It may just be my age but wouldn't it be easier to just use a 555 (do they
yeah that would be easiest, but I want to do something similar for
azimuth and altitude.
On 7/13/20 9:00 PM, Dave Matthews wrote:
It may just be my age but wouldn't it be easier to just use a 555 (do they
still make them) and a knob to tweak the pulse rate to match the star? Add
a slew button
On Mon, Jul 13, 2020 at 8:02 PM Dave Matthews wrote:
> It may just be my age but wouldn't it be easier to just use a 555 (do they
> still make them) and a knob to tweak the pulse rate to match the star?
That would be easy but I think there is some plan to have a "go to"
ability where the 'scope
It may just be my age but wouldn't it be easier to just use a 555 (do they
still make them) and a knob to tweak the pulse rate to match the star? Add
a slew button to change the speed while the button is pushed and a
direction switch to toggle the direction pin on the driver. I guess I
don't see
well, I can calculate what the speed needs to be, also I can actually
"observe" it too.. by pointing the telescope at a star and see how
much the deviation is. I have encoder to check the actual speed of a shaft.
I found some information in a manual/tech-sheet that comes with the
drivers,
A fast control loop that drives each motor at a given speed and a second
slower control loop that figures out what that speed should be. The
second loop typically uses "PID" even if only in fact the "P" is used.
That can be used to drive any number of motors all at their correct speeds.
On Mon
Interesting,
but I already have the motors, and the gears are on their way. What
I was really looking for is how to drive the stepper-drivers, he DM542
series ones.
Ron
On 7/13/20 7:53 PM, cogoman via Emc-users wrote:
I recently discovered geared stepper motors.
http://www.zyltech.
I recently discovered geared stepper motors.
http://www.zyltech.com/nema-17-stepper-motor-geared-planetary-gearbox-1-7-a-3-1-nm-435-ozin/
I've been happy with zyltech in the past. I bought one of these for
evluation, but the specs seem to be great for CNC. Low enough current to
work with a st
Andy has already done that..
https://youtu.be/fo7SwanH50I
On Mon, Jul 13, 2020, 8:11 PM Gregg Eshelman via Emc-users <
emc-users@lists.sourceforge.net> wrote:
> Running it like that should make it possible to cut teeth on thread taps
> with relief. Thread it 'lumpy', mill out most of the chip gr
Running it like that should make it possible to cut teeth on thread taps with
relief. Thread it 'lumpy', mill out most of the chip grooves, harden then grind
to sharpen. Used to be mechanical drive attachments for some lathes to move the
cross slide in and out for cutting threads for taps.
Displacement of the cross slide while cutting a hex head is proportional to
the sin of the spindle angle. Very much like the height of a piston is
proportional to the angle of the crank
Draw a picture of a hexagon and then make a line that crosses one of the
flats at some odd angle. Figure out h
>
> Pretty nice subject to dig into. In the last few days I returned to the
> Cam Design and Manufacturing handbook of Rober L. Norton to try and emulate
> the lobes I'm doing mostly and get the equations right. I'm not gonna lie,
> it's not an easy subject and I'm getting too much info too hard to
>
> In an ideal world, where Peter has infinite amounts
> of time and interest, the entire hal ecosystem could
> be put on the fpga. Practically, though, it is tricky to
> figure out exactly where the line should be drawn
> between servo thread modules running in the main
> processor and "base thr
My initial component was based on this formula.. (after racking my brain
on how to do the math - I googled)
https://math.stackexchange.com/questions/41940/is-there-an-equation-to-describe-regular-polygons/41954#41954
It has slightly more smarts to do slaved radius and such - oh - and I
hacked i
On Monday 13 July 2020 13:56:47 Chris Albertson wrote:
> Actually making a hex head on the lathe would best be done using a
> microcontroller. FPGAs can compute trig functions but I think the
> method used is to first implement a "soft CPU" and then run code
> written in C that uses math.h Tha
Actually making a hex head on the lathe would best be done using a
microcontroller. FPGAs can compute trig functions but I think the method
used is to first implement a "soft CPU" and then run code written in C that
uses math.h That is a silly-expensive why to replace a $5 STM32 chip.
But real
On Monday 13 July 2020 12:44:06 andy pugh wrote:
> On Mon, 13 Jul 2020 at 17:35, Gene Heskett
wrote:
> > ROTFLMAO, Peter see's right thru us. ;-) But seriously, the FPGA
> > does seem like the ideal place for such a module.
>
> I disagree, it's a TC / servo thread thing
TC?
That servo-thread, a
A couple ounces of glenlivet will help you go to sleep.
You are welcome 😁
Stuart
On Mon, Jul 13, 2020, 12:14 PM Ralph Stirling
wrote:
> In an ideal world, where Peter has infinite amounts
> of time and interest, the entire hal ecosystem could
> be put on the fpga. Practically, though, it is tr
In an ideal world, where Peter has infinite amounts
of time and interest, the entire hal ecosystem could
be put on the fpga. Practically, though, it is tricky to
figure out exactly where the line should be drawn
between servo thread modules running in the main
processor and "base thread" component
On Mon, 13 Jul 2020, andy pugh wrote:
On Mon, 13 Jul 2020 at 17:35, Gene Heskett wrote:
ROTFLMAO, Peter see's right thru us. ;-) But seriously, the FPGA does
seem like the ideal place for such a module.
I disagree, it's a TC / servo thread thing
-- atp
Right, the actual limitation is
On Mon, 13 Jul 2020 at 17:35, Gene Heskett wrote:
> ROTFLMAO, Peter see's right thru us. ;-) But seriously, the FPGA does
> seem like the ideal place for such a module.
I disagree, it's a TC / servo thread thing
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed fo
On Monday 13 July 2020 12:00:19 Peter C. Wallace wrote:
> On Mon, 13 Jul 2020, Ralph Stirling wrote:
> > Date: Mon, 13 Jul 2020 13:15:27 +
> > From: Ralph Stirling
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> > To: "Enhanced Machine Controller (EMC)"
> > Subject: Re: [Emc-use
On Monday 13 July 2020 09:15:27 Ralph Stirling wrote:
> Perhaps Peter could write a hostmot2 axis offset module that would run
> in the fpga. No base thread needed.
I think thats a jolly fine idea. But I'd not have a clue where to start.
>
> -- Ralph
>
> On Jul 13, 2020 12:24 AM, Gene Heskett w
On Mon, 13 Jul 2020, Ralph Stirling wrote:
Date: Mon, 13 Jul 2020 13:15:27 +
From: Ralph Stirling
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] Because the hardware store was 4 miles away...
Perhaps Peter could write a
There is no base thread currently.
On Mon, Jul 13, 2020, 10:51 AM Ralph Stirling
wrote:
> Perhaps Peter could write a hostmot2 axis offset module that would run in
> the fpga. No base thread needed.
>
> -- Ralph
>
> On Jul 13, 2020 12:24 AM, Gene Heskett wrote:
> CAUTION: This email originated
Perhaps Peter could write a hostmot2 axis offset module that would run in the
fpga. No base thread needed.
-- Ralph
On Jul 13, 2020 12:24 AM, Gene Heskett wrote:
CAUTION: This email originated from outside the Walla Walla University email
system.
On Sunday 12 July 2020 22:44:05 Leonardo Mar
On Sun, 12 Jul 2020, Sam Sokolik wrote:
Date: Sun, 12 Jul 2020 21:42:23 -0500
From: Sam Sokolik
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] Because the hardware store was 4 miles away...
On Sun, Jul 12, 2020 at 1:50 PM Sa
On Mon, 13 Jul 2020 at 01:17, Chris Albertson wrote:
> "Everyone" uses the Right-Hand Rule. Using your right-hand curl your
> fingers and point your thumb up.
Off topic..
Some years ago a student I vaguely knew through the fire engine club
at the college was shown a picture of two people clear
On Sunday 12 July 2020 22:44:05 Leonardo Marsaglia wrote:
> > Currently - there is no way to adjust it. I do run the
> > acceleration and velocity as high as I can. (on the emco it is in
> > above 50in/s^2) I do have some math that calculates the following
> > error of the shape (actual shape
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