Difference between revisions of "Rotating Tungsten Target System"

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= Parts =
 
= Parts =
 +
 +
[http://www.youtube.com/watch?v=pS0cBeT_trE&context=C41942f6ADvjVQa1PpcFPVZGpWjIhpT6B3B7hDLZHuaQKYXRQ0xVc= Motor test vedio]
  
 
[[File:HRRL_Beam_Rot_Tar_Sys_Mot1.png | 400 px]] [[File:HRRL_Beam_Rot_Tar_Sys_Mot11.png | 400 px]]
 
[[File:HRRL_Beam_Rot_Tar_Sys_Mot1.png | 400 px]] [[File:HRRL_Beam_Rot_Tar_Sys_Mot11.png | 400 px]]
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−
== Rotating Union ==
+
== Rotary Union ==
 +
 
 +
[http://www.dsti.com/products/rotary-unions/sps/ SPS-5510]
 +
 
 +
[[File:hrrl-pos-tar-rotary.pdf]]
 +
 
 
[[File:HRRL_Pos_Rotating_W_Target_Sys_Parts_Roter_1.jpg | 400 px]]
 
[[File:HRRL_Pos_Rotating_W_Target_Sys_Parts_Roter_1.jpg | 400 px]]
 
[[File:HRRL_Pos_Rotating_W_Target_Sys_Parts_Roter_2.jpg | 400 px]]
 
[[File:HRRL_Pos_Rotating_W_Target_Sys_Parts_Roter_2.jpg | 400 px]]
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= STR8 - Step Motor Drives=
 
= STR8 - Step Motor Drives=
 +
 +
Applied Motion Products motor control.
 +
 +
[[file:STR8.png | 300 px]]
 +
 +
== Power Supply ==
 +
 +
[http://www.lamonde.com/acatalog/Products_Power_Supplies_992.html#aSTP_2dPWR_2d4810 Power Supply]
 +
 +
[[File:Rotating_Tar_PS.pdf]]
 +
 +
STP-PWR-4810 Power supply for stepping systems, dual output with 48 VDC @ 10A (at full load) unregulated and 5 VDC at 0.5A regulated.
 +
 +
120/240 VAC, 50/60 Hz supply voltage, overcurrent protection.
 +
 +
[[File:HRRL_Beam_Rot_Tar_Sys_Mot_PS1.png | 400 px]] [[File:HRRL_Beam_Rot_Tar_Sys_Mot_PS2.png | 400 px]]
 +
[[File:HRRL_Beam_Rot_Tar_Sys_Mot_PS6.png | 400 px]] [[File:HRRL_Beam_Rot_Tar_Sys_Mot_PS9.png | 400 px]]
 +
 +
[[https://wiki.iac.isu.edu/index.php/Images#Rotating_Target More PS Images]]
  
 
== Document ==
 
== Document ==
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== Features ==
 
== Features ==
  
−
Low cost, digital step motor driver in compact package•
+
Operates from a 24 to 75 volt DC power supply
 +
 
 +
Running current up to 7.8 amps per phase
 +
 
 +
[[File:Block_Diagram.png | 600 px]]
 +
 
 +
== Other Parts needed ==
 +
 
 +
1) a 24 to 75 volt DC power supply 
 +
 
 +
2) a source of step signals, such as a PLC or motion controller.
 +
 
 +
== Wire Connection ==
 +
 
 +
[[File:STR8-Connection.png | 500 px]]
 +
 
 +
[[File:STR8-Connection_2.png | 600 px]]
 +
 
 +
 
 +
=== Wiring the Motor ===
  
−
Operates from Step & Direction signals or Step CW & Step CCW (jumper selectable)•
+
Connect the drive to the motor. Four lead motors can be connected in only one way, as shown in Figure 1.
 +
We recommend that eight lead motors be connected in parallel, as shown in Figure 2.
 +
If using a non-Applied Motion Products motor, please refer to your motor specs for wiring information.
  
−
Enable input•
+
[[File:STR8-Connection_3.png | 1000 px]]
  
−
Fault output•
+
=== Step Control ===
  
−
Optically isolated I/O•
+
Step Pulse Type
 +
Most indexers and motion controllers provide motion commands in the “Step and Direction” format. The Step signal pulses once for each motor step and the direction signal commands direction. However, a few PLCs use a different type of command signal: one signal pulses once for each desired step in the clockwise direction (called STEP CW), while a second signal pulses for counterclockwise motion (STEP CCW). '''The STR drives can accept this type of signal if you remove the drive cover and move jumper S3 from the “1-2” position to the “1-3” position.''' In STEP CW/STEP CCW mode, the CW signal should be connected to the STEP input and the CCW signal to the DIR input.
  
−
Digital filters prevent position error from electrical noise on command signals•
 
  
−
Jumper selectable: 150 kHz or 2 MHz•
+
[[File:hrrl-pos-tar-motor-puls-cont-step-dir.png | 500 px]]
  
−
Rotary switch easily selects from many popular motors•
 
  
−
Electronic damping and anti-resonance•
+
=== Test ===
  
−
Automatic idle current reduction to reduce heat when motor is not moving•
+
Two Al slabs are place to the disk.
  
−
Switch selectable: 50% or 90% of running current•
+
Weight of the Al slab is 235 and 240 grams. Their center of mass are 13 +- 1 cm from the center of disk.
  
−
Switch selectable step resolution: 200 (full step), 400 (half step), 2000, 5000, 12800 or • 20000 steps/rev
+
Inertia Solid cuboid of height h, width w, and depth d, and mass m: <math>I_h~=~\frac{1}{12}m(w^2+d^2)</math>
  
−
Switch selectable microstep emulation provides smoother, more reliable motion in full and • half step modes
+
<math>I_h~=~\frac{1}{12}0.2375(0.126^2+0.72^2) =\frac{1}{12} 0.2375 \times 0.534276  =\frac{1}{12} 0.12689055 = 0.0106</math>
  
−
Automatic self test (switch selectable)
 
  
−
Operates from a 24 to 75 volt DC power supply
+
<math>I_d = I_h + md^2 = 0.0106 + 0.2375 \times 0.13^2 = 0.0106 + 0.00401375 = 0.01461375 </math>
 +
 
 +
 
 +
<math>2I_d =  0.03 </math>
 +
 
 +
I was able to rotate these two slabs with with maximum frequencies from the pulser
 +
 
 +
steps/rev    TTL from pulser      Disk rotation
 +
200          1.4  kHz              7 Hz
 +
200 smooth  1.6  kHz              8 Hz
 +
400          3.2  kHz              8 Hz
 +
400 smooth  3.2  kHz              8 Hz
 +
2000        16.5 kHz              8.25 Hz (TTL frequency increase with small increment.)
 +
5000        40  kHz              8 Hz
 +
20000        164  kHz              8.2
 +
 
 +
If I go above these these speed, motor stops. To reach highest speed, the TTL pulse should be increased with small increment.
 +
 
 +
==== W disk inertia calculation ====
 +
 
 +
Thickness of the disk is 0.04 inch = 1.016 mm. Disk inner diameter is 5.75 inches (0.14605 m) and outer diameter is 14.5 inches (0.3683 m).
 +
 
 +
Density of tungsten: <math>19.25 ~ g·cm^{−3}</math>
 +
 
 +
 
 +
<math>I_z~=~\frac{1}{2} \pi \rho h (r_2^4 - r_1^4) = 0.5~\times~3.14~\times~19.25~\times~10^3~kg·m^{-1}~1.016~\times10^{-3}~\times~((0.3683/2~m)^4 - (0.14605/2~m)^4) </math>
 +
 
 +
<math>I_z = 0.5*3.14*19.25*10^3*1.016*10^{-3}*((0.3683/2)^4 - (0.14605/2)^4)</math>
  
−
Running current up to 7.8 amps per phase
+
<math>I_z = 30.70606* (0.00112153384) = 0.0344 </math>

Latest revision as of 00:03, 29 September 2012

Parts

Motor test vedio

HRRL Beam Rot Tar Sys Mot1.png HRRL Beam Rot Tar Sys Mot11.png HRRL Beam Rot Tar Sys Mot7.png HRRL Beam Rot Tar Sys Mot16.png

[More Images ]


Rotary Union

SPS-5510

File:Hrrl-pos-tar-rotary.pdf

HRRL Pos Rotating W Target Sys Parts Roter 1.jpg HRRL Pos Rotating W Target Sys Parts Roter 2.jpg HRRL Pos Rotating W Target Sys Parts Roter 3.jpg HRRL Pos Rotating W Target Sys Parts Roter 4.jpg HRRL Pos Rotating W Target Sys Parts Roter 5.jpg HRRL Pos Rotating W Target Sys Parts Roter 6.jpg

Positron Target Box

Hrrl e+ Target area Space.png


The pipe that go through quads has inner diameter: 47.38 * mm

STR8 - Step Motor Drives

Applied Motion Products motor control.

STR8.png

Power Supply

Power Supply

File:Rotating Tar PS.pdf

STP-PWR-4810 Power supply for stepping systems, dual output with 48 VDC @ 10A (at full load) unregulated and 5 VDC at 0.5A regulated.

120/240 VAC, 50/60 Hz supply voltage, overcurrent protection.

HRRL Beam Rot Tar Sys Mot PS1.png HRRL Beam Rot Tar Sys Mot PS2.png HRRL Beam Rot Tar Sys Mot PS6.png HRRL Beam Rot Tar Sys Mot PS9.png

[More PS Images]

Document

STR8 Documents

STR8 Manuals:

Media:STR_Hardware_Manual.pdf

Media:STR_Quick_Setup_Guide.pdf

Datasheet:

Media:STR_Brochure_925-0002_RevC.pdf

2D Drawing:

Media:STR4_8_drawing.pdf

Media:ST4_8_simple_3D.pdf

Speed-Torque Curves:

Media:STR_speed-torque.pdf

Features

Operates from a 24 to 75 volt DC power supply

Running current up to 7.8 amps per phase

Block Diagram.png

Other Parts needed

1) a 24 to 75 volt DC power supply

2) a source of step signals, such as a PLC or motion controller.

Wire Connection

STR8-Connection.png

STR8-Connection 2.png


Wiring the Motor

Connect the drive to the motor. Four lead motors can be connected in only one way, as shown in Figure 1. We recommend that eight lead motors be connected in parallel, as shown in Figure 2. If using a non-Applied Motion Products motor, please refer to your motor specs for wiring information.

STR8-Connection 3.png

Step Control

Step Pulse Type Most indexers and motion controllers provide motion commands in the “Step and Direction” format. The Step signal pulses once for each motor step and the direction signal commands direction. However, a few PLCs use a different type of command signal: one signal pulses once for each desired step in the clockwise direction (called STEP CW), while a second signal pulses for counterclockwise motion (STEP CCW). The STR drives can accept this type of signal if you remove the drive cover and move jumper S3 from the “1-2” position to the “1-3” position. In STEP CW/STEP CCW mode, the CW signal should be connected to the STEP input and the CCW signal to the DIR input.


Hrrl-pos-tar-motor-puls-cont-step-dir.png


Test

Two Al slabs are place to the disk.

Weight of the Al slab is 235 and 240 grams. Their center of mass are 13 +- 1 cm from the center of disk.

Inertia Solid cuboid of height h, width w, and depth d, and mass m: [math]I_h~=~\frac{1}{12}m(w^2+d^2)[/math]

[math]I_h~=~\frac{1}{12}0.2375(0.126^2+0.72^2) =\frac{1}{12} 0.2375 \times 0.534276 =\frac{1}{12} 0.12689055 = 0.0106[/math]


[math]I_d = I_h + md^2 = 0.0106 + 0.2375 \times 0.13^2 = 0.0106 + 0.00401375 = 0.01461375 [/math]


[math]2I_d = 0.03 [/math]

I was able to rotate these two slabs with with maximum frequencies from the pulser 

steps/rev    TTL from pulser      Disk rotation
200          1.4  kHz              7 Hz
200 smooth   1.6  kHz              8 Hz
400          3.2  kHz              8 Hz
400 smooth   3.2  kHz              8 Hz
2000         16.5 kHz              8.25 Hz (TTL frequency increase with small increment.)
5000         40   kHz              8 Hz
20000        164  kHz              8.2

If I go above these these speed, motor stops. To reach highest speed, the TTL pulse should be increased with small increment.

W disk inertia calculation

Thickness of the disk is 0.04 inch = 1.016 mm. Disk inner diameter is 5.75 inches (0.14605 m) and outer diameter is 14.5 inches (0.3683 m).

Density of tungsten: [math]19.25 ~ g·cm^{−3}[/math]


[math]I_z~=~\frac{1}{2} \pi \rho h (r_2^4 - r_1^4) = 0.5~\times~3.14~\times~19.25~\times~10^3~kg·m^{-1}~1.016~\times10^{-3}~\times~((0.3683/2~m)^4 - (0.14605/2~m)^4) [/math]

[math]I_z = 0.5*3.14*19.25*10^3*1.016*10^{-3}*((0.3683/2)^4 - (0.14605/2)^4)[/math]

[math]I_z = 30.70606* (0.00112153384) = 0.0344 [/math]

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