ALF Goniometer
The ALF Goniometer is a 6-axis goniometer. There is no specific logic required in controlling it, all that is required is the standard movement across the whole range with appropriate encoder/motor counts, and an ability to home all axes to a known position.
Axes Conventions
The numbering of the axes below corresponds to the number of the axes on the annotated diagram of the ALF goniometer.
Z-axis
theta
(a.k.a.Rrot
)Cy
(according togalil.ini
for LabVIEW control)Cx
(according togalil.ini
for LabVIEW control)Rlower
Rupper
Axes & Motors
The table below defines how the goniometer axes are connected to motors, and the motor setup data needed:
Axis Name |
|
|
|
|
|
|
---|---|---|---|---|---|---|
Axis letter (crate) |
F |
E |
D |
C |
B |
A |
Units |
deg |
deg |
mm |
mm |
deg |
mm |
Acceleration |
4000 |
4000 |
4000 |
4000 |
8192 |
2048 |
Deceleration |
4000 |
4000 |
4000 |
4000 |
8192 |
2048 |
Speed |
700 |
2000 |
2000 |
2000 |
2048 |
4096 |
LabVIEW Motor Steps per Unit |
1358 |
1719 |
640 |
640 |
756 |
641 |
Motor Type |
Reverse |
Reverse |
Reverse |
Forward |
Forward |
Forward |
Encoder Present |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
LabVIEW Encoder Steps per Unit |
842 |
1074 |
400 |
400 |
472 |
400 |
Encoder Type |
Normal Quadrature |
Normal Quadrature |
Normal Quadrature |
Reverse Quadrature |
Normal Quadrature |
Reverse Quadrature |
Home Method |
Forward |
Forward |
Forward |
Forward |
None |
Reverse |
Home Value |
25.4 |
27.6 |
55.6 |
57.922 |
N/A |
0 |
Max from Home |
25.4 |
27.6 |
55.6 |
57.5 |
N/A |
200 |
Min from Home |
-25.4 |
-27.6 |
-55.6 |
-57.5 |
N/A |
0 |
Max Travel |
40 |
80 |
100 |
100 |
360 |
200 |