Re: [Emc-users] homing off glass scale

2021-05-23 Thread Gene Heskett 
On Sunday 23 May 2021 02:17:28 Roland Jollivet wrote:

> On Sun, 23 May 2021 at 03:31, Jon Elson  wrote:
> > On 05/22/2021 07:12 PM, dave engvall wrote:
> > >> Has anyone tried homing off the reference channel on a
> > >> glass scale? There is information on the web indicating
> > >> that at least some of the chinese glass
> > >> scales mask and compare the 4 lines each side of the
> > >> reference mark in addition to the reference. This might
> > >> imply that the usual homing routine would work.
> > >> I haven't tried this only because I have nothing running
> > >> at the moment capable of doing this.
> >
> > If the "reference channel" produces one pulse at a specific
> > spot on the scale with no other pulses within a few tenths
> > of an inch, you should be able to use it for precise
> > homing.  You'd have a limit switch that would begin the
> > search for index sequence of the homing routine.  Then, it
> > would advance until it saw the pulse from the scale.  Just
> > like the Z mark on a rotary encoder.
> >
> > Jon
>
> I often feel like that I live in a world where cars have three wheels,
> and no-one wants to believe that 4 wheels are better..
>
> So  I don't understand why the reference strip in an encoder isn't
> half black, half clear, along the full length. Now;
> - there is only a single transition that marks the reference point
> - it's always obvious which way to go to find that transition;  0:go
> left 1:go right
> - you don't have to worry (as much) about missing that obscure 'pulse'
> - it will remove the homing dilemma plaguing machinists all over the
> world
>
> What am I missing here?
>
> Roland

Nothing Roland. I do exactly that but with a switch thats closed from its 
hit point clear to the chuck and beyond on my Sheldom lathe for Z 
homing. It's 10" or so from the chuck.  Cheap mini micro switches. $5 
for a bag of 10.  An error from either of the 2 stepper servos unhomes 
the machine as the reset on those requires a driver powerdown achieved 
with an f2 disable that shuts down a pair of 40 amp SSR's killing both 
sides of the 250 volt line. And I have .hal configured to do that. So 
after an error, I pull the tool holder, hit f2 to re-enable and rehome 
the machine which goes not destroy the previously set touch-offs. The 
rehome is within .0002" with those cheap switches, then re-install the 
tool and comtinue where it was interrupted. Whats not to like?

Take care and stay well.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] homing off glass scale

2021-05-23 Thread Andy Pugh 



> On 22 May 2021, at 16:12, dave engvall  wrote:
> 
> Hi,
> Has anyone tried homing off the reference channel on a glass scale?

There has been discussion on the forum of one type of scale (distance coded) 
https://forum.linuxcnc.org/12-milling/42195-retrofitting-mikron-wf41c-distance-coded-homing?start=40#209006
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[Emc-users] homing off glass scale

2021-05-23 Thread Roland Jollivet 
On Sun, 23 May 2021 at 03:31, Jon Elson  wrote:

> On 05/22/2021 07:12 PM, dave engvall wrote:
> >
> >> Has anyone tried homing off the reference channel on a
> >> glass scale? There is information on the web indicating
> >> that at least some of the chinese glass
> >> scales mask and compare the 4 lines each side of the
> >> reference mark in addition to the reference. This might
> >> imply that the usual homing routine would work.
> >> I haven't tried this only because I have nothing running
> >> at the moment capable of doing this.
> If the "reference channel" produces one pulse at a specific
> spot on the scale with no other pulses within a few tenths
> of an inch, you should be able to use it for precise
> homing.  You'd have a limit switch that would begin the
> search for index sequence of the homing routine.  Then, it
> would advance until it saw the pulse from the scale.  Just
> like the Z mark on a rotary encoder.
>
> Jon
>
>

I often feel like that I live in a world where cars have three wheels, and
no-one wants to believe that 4 wheels are better..

So  I don't understand why the reference strip in an encoder isn't half
black, half clear, along the full length. Now;
- there is only a single transition that marks the reference point
- it's always obvious which way to go to find that transition;  0:go left
   1:go right
- you don't have to worry (as much) about missing that obscure 'pulse'
- it will remove the homing dilemma plaguing machinists all over the world

What am I missing here?

Roland

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Re: [Emc-users] homing off glass scale

2021-05-22 Thread Feral Engineer 
Well, i mean there is that guy AvE on YouTube that cut a potato on a
bridgeport...

Phil T.
The Feral Engineer

Check out my LinuxCNC tutorials, machine builds and other antics at
www.youtube.com/c/theferalengineer

On Sat, May 22, 2021, 9:58 PM Peter C. Wallace  wrote:

> On Sat, 22 May 2021, dave engvall wrote:
>
> > Date: Sat, 22 May 2021 17:12:35 -0700
> > From: dave engvall 
> > Reply-To: "Enhanced Machine Controller (EMC)"
> > 
> > To: "Enhanced Machine Controller (EMC)"  >
> > Subject: Re: [Emc-users] homing off glass scale
> >
> > Talk about having a bad day. Sure glad the extras were just a recipe and
> > not something private. :-)
> >
> > Dave
>
> I was having more than a bit of trouble figuring out the relevance
>
> Precision food machining?
>
> Peter Wallace
> Mesa Electronics
>
>
>
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Re: [Emc-users] homing off glass scale

2021-05-22 Thread Peter C. Wallace 

On Sat, 22 May 2021, dave engvall wrote:


Date: Sat, 22 May 2021 17:12:35 -0700
From: dave engvall 
Reply-To: "Enhanced Machine Controller (EMC)"

To: "Enhanced Machine Controller (EMC)" 
Subject: Re: [Emc-users] homing off glass scale

Talk about having a bad day. Sure glad the extras were just a recipe and 
not something private. :-)


Dave


I was having more than a bit of trouble figuring out the relevance

Precision food machining?

Peter Wallace
Mesa Electronics



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Re: [Emc-users] homing off glass scale

2021-05-22 Thread Jon Elson 

On 05/22/2021 07:12 PM, dave engvall wrote:


Has anyone tried homing off the reference channel on a 
glass scale? There is information on the web indicating 
that at least some of the chinese glass
scales mask and compare the 4 lines each side of the 
reference mark in addition to the reference. This might 
imply that the usual homing routine would work.
I haven't tried this only because I have nothing running 
at the moment capable of doing this.
If the "reference channel" produces one pulse at a specific 
spot on the scale with no other pulses within a few tenths 
of an inch, you should be able to use it for precise 
homing.  You'd have a limit switch that would begin the 
search for index sequence of the homing routine.  Then, it 
would advance until it saw the pulse from the scale.  Just 
like the Z mark on a rotary encoder.


Jon


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Re: [Emc-users] homing off glass scale

2021-05-22 Thread Feral Engineer 
I'm allergic to shrimp, so I just kept scrolling 

Phil T.
The Feral Engineer

Check out my LinuxCNC tutorials, machine builds and other antics at
www.youtube.com/c/theferalengineer

On Sat, May 22, 2021, 8:16 PM dave engvall  wrote:

> Talk about having a bad day. Sure glad the extras were just a recipe and
> not something private. :-)
>
> Dave
>
> ps. clear down at the bottom of the post is the 'real post' about homing
> with a glass scale.
> You can delete  90% of it and won't miss a thing.
>
>
> On 5/22/21 8:09 AM, dave engvall wrote:
> >
> >  Instructions
> >
> >  *
> >Rinse and pat the shrimp dry, then transfer to a large mixing bowl.
> >Drizzle with 1/2 tablespoon olive oil and sprinkle with the chili
> >powder, chipotle chili, cumin, and salt. Toss to coat evenly. Let
> >rest while you prepare the shrimp taco sauce and slaw.
> >  *
> >Prepare the sauce and slaw: In a food processor fitted with a steel
> >blade, process the Greek yogurt, olive oil, garlic, jalapeno,
> >cilantro, salt, lime zest, and lime juice. Taste and adjust
> >seasonings as desired. Place the cabbage in a mixing bowl and toss
> >with about 1/2 cup of the sauce. Add more sauce if you desire a
> >creamier slaw, then reserve the rest of the sauce for serving.
> >  *
> >Cook the shrimp: In a large nonstick skillet over medium high, heat
> >the remaining 1/2 tablespoon olive oil. Add the shrimp and sauté
> >just until the shrimp is cooked through and no longer translucent in
> >the center, about 4 minutes. Do not overcook! Transfer
> >the shrimp immediately to a plate.
> >  *
> >Warm the tortillas (optional) and assemble the tacos: If you like,
> >warm the tortillas in the microwave (put them in a stack and cover
> >them with a lightly damp towel) or a 250 degree F oven while
> >the shrimp cook. To serve, fill the tortillas with your desired
> >number of shrimp, then top generously with the slaw, extra sauce, a
> >squeeze of lime juice, and any other desired toppings. Enjoy
> >immediately.
> >
> >
> >  Notes
> >
> >  * The shrimp tastes best the day it is made but can be stored in the
> >refrigerator for up to 3 days. Since shrimp tends to dry out when
> >reheated, I prefer to use the leftovers on top of salads. Slaw can
> >be stored in the refrigerator for up to 2 days, and any extra sauce
> >can be refrigerated for up to 5 days.
> >
> >
> >  Nutrition
> >
> > *Serving*: 1taco (of 8), including tortilla, shrimp, and slaw
> > *Calories*: 158kcal
> > *Carbohydrates*: 14g
> > *Protein*: 13g
> > *Fat*: 6g
> > *Saturated Fat*: 1g
> > *Cholesterol*: 1mg
> > *Fiber*: 2gSugar: 3g
> >
> > Advertisement
> >
> > Well Plated
> >
> >
> >More from Well Plated
> >
> >  * Instant Pot Chicken Tikka Masala Recipe
> > <
> https://getpocket.com/redirect?skipSyndication=1=https%3A%2F%2Fwww.wellplated.com%2Finstant-pot-chicken-tikka-masala%2F=6e8822e7c6867bde36d360007e1940d53f9b906a6219ff5e4794b9af487efba0=0
> >
> >
> >413 saves
> >  * Harvest Chicken Skillet with Sweet Potatoes Brussels Sprouts and
> >Sautéed Apples
> > <
> https://getpocket.com/redirect?skipSyndication=1=https%3A%2F%2Fwww.wellplated.com%2Fchicken-apple-sweet-potato-and-brussels-sprouts-skillet%2F=585682adb533bc9ea8ffbb3ac8257c1618a4645af28741047ac5159f8f29f791=0
> >
> >
> >375 saves
> >  * Slow Cooker Honey Garlic Chicken Recipe
> > <
> https://getpocket.com/redirect?skipSyndication=1=https%3A%2F%2Fwww.wellplated.com%2Fslow-cooker-honey-garlic-chicken%2F=ad049192a5acfb8395374630c2c5baf5ac54b0739d3a8b0a3581f1b7edb78a21=0
> >
> >
> >216 saves
> >
> > Advertisement
> >
> > How was it? Save stories you love and never lose them.
> >
> > 
> >
> > This post originally appeared on Well Plated and was published April
> > 11, 2018. This article is republished here with permission.
> >
> > What more easy, healthy recipes?
> >
> > Get Well Plated’s Newsletter
> > 
> >
> > Advertisement
> >
> >
> >  More Stories from Pocket
> >
> >  *
> > <
> https://getpocket.com/explore/item/how-to-make-better-than-takeout-beef-and-broccoli-in-the-slow-cooker
> >
> >
> >
> >
> >How To Make Better-than-Takeout Beef and Broccoli in the
> >Slow Cooker
> >
> > <
> https://getpocket.com/explore/item/how-to-make-better-than-takeout-beef-and-broccoli-in-the-slow-cooker
> >
> >  * 
> >
> >
> >Korean Beef Bulgogi Recipe
> >
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> >  *
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> https://getpocket.com/explore/item/cheesy-mashed-potato-pancakes-recipe-video
> >
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> >
> > <
> https://getpocket.com/explore/item/cheesy-mashed-potato-pancakes-recipe-video
> >
> >  *

Re: [Emc-users] homing off glass scale

2021-05-22 Thread dave engvall 
Talk about having a bad day. Sure glad the extras were just a recipe and 
not something private. :-)


Dave

ps. clear down at the bottom of the post is the 'real post' about homing 
with a glass scale.

You can delete  90% of it and won't miss a thing.


On 5/22/21 8:09 AM, dave engvall wrote:


 Instructions

 *
   Rinse and pat the shrimp dry, then transfer to a large mixing bowl.
   Drizzle with 1/2 tablespoon olive oil and sprinkle with the chili
   powder, chipotle chili, cumin, and salt. Toss to coat evenly. Let
   rest while you prepare the shrimp taco sauce and slaw.
 *
   Prepare the sauce and slaw: In a food processor fitted with a steel
   blade, process the Greek yogurt, olive oil, garlic, jalapeno,
   cilantro, salt, lime zest, and lime juice. Taste and adjust
   seasonings as desired. Place the cabbage in a mixing bowl and toss
   with about 1/2 cup of the sauce. Add more sauce if you desire a
   creamier slaw, then reserve the rest of the sauce for serving.
 *
   Cook the shrimp: In a large nonstick skillet over medium high, heat
   the remaining 1/2 tablespoon olive oil. Add the shrimp and sauté
   just until the shrimp is cooked through and no longer translucent in
   the center, about 4 minutes. Do not overcook! Transfer
   the shrimp immediately to a plate.
 *
   Warm the tortillas (optional) and assemble the tacos: If you like,
   warm the tortillas in the microwave (put them in a stack and cover
   them with a lightly damp towel) or a 250 degree F oven while
   the shrimp cook. To serve, fill the tortillas with your desired
   number of shrimp, then top generously with the slaw, extra sauce, a
   squeeze of lime juice, and any other desired toppings. Enjoy
   immediately.


 Notes

 * The shrimp tastes best the day it is made but can be stored in the
   refrigerator for up to 3 days. Since shrimp tends to dry out when
   reheated, I prefer to use the leftovers on top of salads. Slaw can
   be stored in the refrigerator for up to 2 days, and any extra sauce
   can be refrigerated for up to 5 days.


 Nutrition

*Serving*: 1taco (of 8), including tortilla, shrimp, and slaw
*Calories*: 158kcal
*Carbohydrates*: 14g
*Protein*: 13g
*Fat*: 6g
*Saturated Fat*: 1g
*Cholesterol*: 1mg
*Fiber*: 2gSugar: 3g

Advertisement

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 * Instant Pot Chicken Tikka Masala Recipe


   413 saves
 * Harvest Chicken Skillet with Sweet Potatoes Brussels Sprouts and
   Sautéed Apples


   375 saves
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[Emc-users] homing off glass scale

2021-05-22 Thread dave engvall 


 Instructions

 *
   Rinse and pat the shrimp dry, then transfer to a large mixing bowl.
   Drizzle with 1/2 tablespoon olive oil and sprinkle with the chili
   powder, chipotle chili, cumin, and salt. Toss to coat evenly. Let
   rest while you prepare the shrimp taco sauce and slaw.
 *
   Prepare the sauce and slaw: In a food processor fitted with a steel
   blade, process the Greek yogurt, olive oil, garlic, jalapeno,
   cilantro, salt, lime zest, and lime juice. Taste and adjust
   seasonings as desired. Place the cabbage in a mixing bowl and toss
   with about 1/2 cup of the sauce. Add more sauce if you desire a
   creamier slaw, then reserve the rest of the sauce for serving.
 *
   Cook the shrimp: In a large nonstick skillet over medium high, heat
   the remaining 1/2 tablespoon olive oil. Add the shrimp and sauté
   just until the shrimp is cooked through and no longer translucent in
   the center, about 4 minutes. Do not overcook! Transfer
   the shrimp immediately to a plate.
 *
   Warm the tortillas (optional) and assemble the tacos: If you like,
   warm the tortillas in the microwave (put them in a stack and cover
   them with a lightly damp towel) or a 250 degree F oven while
   the shrimp cook. To serve, fill the tortillas with your desired
   number of shrimp, then top generously with the slaw, extra sauce, a
   squeeze of lime juice, and any other desired toppings. Enjoy
   immediately.


 Notes

 * The shrimp tastes best the day it is made but can be stored in the
   refrigerator for up to 3 days. Since shrimp tends to dry out when
   reheated, I prefer to use the leftovers on top of salads. Slaw can
   be stored in the refrigerator for up to 2 days, and any extra sauce
   can be refrigerated for up to 5 days.


 Nutrition

*Serving*: 1taco (of 8), including tortilla, shrimp, and slaw
*Calories*: 158kcal
*Carbohydrates*: 14g
*Protein*: 13g
*Fat*: 6g
*Saturated Fat*: 1g
*Cholesterol*: 1mg
*Fiber*: 2gSugar: 3g

Advertisement

Well Plated


   More from Well Plated

 * Instant Pot Chicken Tikka Masala Recipe
   


   413 saves
 * Harvest Chicken Skillet with Sweet Potatoes Brussels Sprouts and
   Sautéed Apples
   


   375 saves
 * Slow Cooker Honey Garlic Chicken Recipe
   


   216 saves

Advertisement

How was it? Save stories you love and never lose them.



This post originally appeared on Well Plated and was published April 11, 
2018. This article is republished here with permission.


What more easy, healthy recipes?

Get Well Plated’s Newsletter 



Advertisement


 More Stories from Pocket

 * 




   How To Make Better-than-Takeout Beef and Broccoli in the
   Slow Cooker

   

 * 


   Korean Beef Bulgogi Recipe

   
 * 




   Cheesy Mashed Potato Pancakes Recipe

   

 * 


   How to Make Marinara Sauce

   
 * 


   How To Make French Onion Soup

   


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 * Coronavirus 
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 * Career 
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