please dont rip this site

NEW201906

 

ON 20190604@5:17:06 PM at page:
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http://www.massmind.org/Techref/io/stepper/PMinMOtoRAMPS.htm#
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ON 20190604@5:18:11 PM at page:
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ON 20190604@6:59:31 PM at page:
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ON 20190604@6:59:46 PM at page:
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ON 20190604@7:01:21 PM at page:
On a web page you were interested in at:
http://www.massmind.org/Techref/io/stepper/pminmotoramps.htm#43619.4955787037
James Newton[JMN-EFP-786] Published and replied to post 43619.4955787037 by camphorblue

|Insert 'Yes, you should enable connection of the enable signal by bridging that pad. I've updated the docs to indicate that.

Any version of Grbl should work, as they all control stepper motors.' at: '<!-- 43619.4955787037 EOR --><A style="color:#AF4040" TITLE="Click to login and reply" REL="nofollow" HREF="/techref/login/default.asp?req=/techref/update.asp%3Fact=reply%26url=/Techref/new201906.txt%26id=43619.4955787037">+</A>'' but after: '<A TITLE="'.



ON 20190604@7:04:08 PM at page:
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ON 20190604@7:15:09 PM at page:
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James Newton[JMN-EFP-786] Published and replied to post 43618.649525463 by camphorblue

|Insert 'I guess it makes more sense to have that say "to" instead of "from", thanks for the feedback. The BOB PID needs logic power from <I>somewhere</I> and it can get it from the DC motor driver, or from the motion controller or whatever.' at: '<!-- 43618.649525463 EOR --><A style="color:#AF4040" TITLE="Click to login and reply" REL="nofollow" HREF="/techref/login/default.asp?req=/techref/update.asp%3Fact=reply%26url=/Techref/new201906.txt%26id=43618.649525463">+</A>'' but after: '<A TITLE="'.



ON 20190604@8:05:26 PM at page:
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ON 20190604@8:05:53 PM at page:
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ON 20190604@8:06:23 PM at page:
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ON 20190604@8:07:35 PM at page:
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ON 20190604@8:07:53 PM at page:
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ON 20190608@11:44:04 AM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/silkscreen.htm#43624.4889351852
James Newton[JMN-EFP-786] See also:
https://photos.app.goo.gl/f3LuLiXJNiKkzyTRA
Photos from a silkscreen making class featuring several unique low cost methods for stretching, exposing, and storing screens.



ON 20190608@11:46:03 AM at page:
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ON 20190610@9:10:09 PM at page:
On a web page you were interested in at:
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(anonymous user) I have agreed to maintain this page.



ON 20190611@6:14:13 PM at page:
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ON 20190611@6:15:47 PM at page:
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ON 20190611@6:15:53 PM at page:
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ON 20190611@6:16:42 PM at page:
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ON 20190611@6:17:07 PM at page:
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ON 20190611@6:17:36 PM at page:
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ON 20190611@6:18:17 PM at page:
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ON 20190611@6:18:32 PM at page:
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ON 20190611@6:18:49 PM at page:
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ON 20190611@6:19:09 PM at page:
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ON 20190611@6:19:51 PM at page:
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ON 20190617@2:33:51 PM at page:
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ON 20190617@2:34:25 PM at page:
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ON 20190617@2:34:43 PM at page:
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ON 20190617@2:35:07 PM at page:
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ON 20190617@2:35:28 PM at page:
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ON 20190617@2:35:39 PM at page:
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ON 20190617@2:36:21 PM at page:
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ON 20190617@2:36:41 PM at page:
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ON 20190618@6:52:13 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/robot/arms.htm#43634.7862615741
James Newton[JMN-EFP-786] Says
/Techref/robot/kinematics.htm
Kinematics



ON 20190618@6:52:40 PM at page:
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http://techref.massmind.org/Techref/robot/arms.htm#
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ON 20190618@6:53:23 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/robot/kinematics.htm#
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ON 20190618@6:54:22 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/robot/kinematics.htm#43634.7877546296
James Newton[JMN-EFP-786] Code:
https://enkimute.github.io/ganja.js/examples/coffeeshop.html
<PRE>// Create a Clifford Algebra with 2,0,1 metric.
Algebra(2,0,1,()=&gt;{  

  // In the inverse kinematics problem we need to calculate joint angles of
  // a kinematic chain so its base remains fixed and its tip reaches a given 
  // target. This is a highly non-linear problem with many solutions. We 
  // implement a solver that tries to minimize the differences on all 
  // remaining degrees of freedom.
  
  // This algorithm readily translates to 3D, is efficient and very well
  // received by artists in a cg animation context.
  
  // Translate dist along line.
  var translator = (line,dist)=&gt;1+0.5*dist*(line.Normalized*1e012);

  // Create chain of points. (l = number of segments in chain)
  var l=6, d=3/l, points=[...Array(l+1)].map((x,i)=&gt;1e12+(1.5-i*d)*1e02);

  // solver. Last point in chain is the target. Set tip to target, then cycle to base and back
  // restoring original lengths.
  var IK=(c)=&gt;{
  // Run four relaxation steps
    for (var i,j=0;j&lt;4; j++) { 
    // Set the tip to the target. (this will change the length of the last segment.)
      c[l-1].set(c[l]); 
    // Run backwards to the base and restore the lengths along the chain.  
      for (i=l-2; i&gt;0; i--) c[i].set(translator(c[i]&amp;c[i+1],-d)&gt;&gt;&gt;(c[i+1])); 
    // Loop the other way from base to tip again restoring all lengths.  
      for (i=1; i&lt;l; i++) c[i].set(translator(c[i-1]&amp;c[i],d)&gt;&gt;&gt;(c[i-1])); 
  }};

  // Evaluate IK, render points and lines, target last (so its on top)
  document.body.appendChild(this.graph([].concat(
    ()=&gt;IK(points), points[0], &quot;Base&quot;,                  // run IK and render base
    0x0000ff,points.slice(1,l),                         // render joint points. [A,B,C,..]
    points.map((x,i,a)=&gt;[a[i-1],x]).slice(1,l),         // render line segments. [[A,B],[B,C],..]
    0x000000,points[l],&quot;Target&quot;                         // render target in black
  ),{grid:true}));
  
});</PRE>



ON 20190618@7:01:41 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/robot/kinematics.htm#
James Newton[JMN-EFP-786] edited the page. Difference:
http://techref.massmind.org/techref/diff.asp?url=\Techref\robot\kinematics.htm&version=2



file: /Techref/new201906.txt, 25KB, , updated: 2019/6/18 19:01, local time: 2019/6/25 01:55,
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