|
Velmex offers two rotary tables designs. Click
on either image for details.
| B4800 is a Series of three Rotary Tables that use a worm and
gear drive design with a heavy duty central rotating ball bearing.
The tables accept NEMA size 23 stepper motors or
instrument case-type motors (Bodine Type K).Specifications |
All tables have a hollow spindle or clear aperture for optical
applications, an 360° scale and an adjustment to minimize gear
backlash. Attaches to Series 4000 or 6000 UniSlide Assemblies with the A6000TX adapter plate. Plate
is 6" x 6" x ¼". Attaches to BiSlide with MSPP-3 plate. Download
CAD drawings. |
Options :
|
- Black anodized finish Photo
3
|
 |
|
- Magnetic reed home switch option Photo
4
|
|
| |
|
| |
Vacuum Preparation:
includes degreasing internal bearings
and re greasing with vacuum compatible grease.
More details.
|
| |
|
|
|
- Encoders on dc gear motor motor shaft
extension Photo 5
|
< B4800 with Pittman gear motor |
Gear ratios and performance
| |
|
At
maximum input of 600 RPM |
|
| Model Number |
Gear Ratio |
RPM |
Time
Per Revolution |
Degrees
Second |
Degrees
per Step |
Typical
Backlash |
| B4818TS |
18:1 |
33.3 |
1.8
sec |
200°/sec |
0.050°* |
600
arc - second |
| B4836TS |
36:1 |
16.7 |
3.6
sec |
100°/sec |
0.025°* |
400
arc - second |
| B4872TS |
72:1 |
8.3 |
7.2
sec |
50°/sec |
0.0125°* |
200
arc - second |
|
*Degree per Step values are with 400 step/revolution
(0.9° resolution) motors
| Load
Capacity when table is... |
Series B4800TS |
| Horizontal |
200 lbs. |
| Vertical |
25 lbs. |
| Cantilever
Load (Horiz.) |
500 in-lb. |
| Table
top axial run out |
0.00025"
TIR |
| Table
top radial run out |
0.0005" TIR |
| Accuracy |
100 arc -
second |
| Repeatability |
1 arc - second |
| Table
weight |
5.5 lbs.
/ 2.5 kg. |
| Max. input
shaft speed |
600 rpm |
| Max.
input shaft torque |
150 oz-in |
|
Dimensions for all B4800 Rotary Tables
| Item |
Inches |
mm |
| Overall
length |
5.72 |
145 |
| Threaded
holes for payload |
3.25 BC |
83 |
| Clear
Aperture |
1.57 |
40 |
| Diameter |
4.92 |
125 |
| Width |
5.27 |
134 |
| Height |
2.37 |
60 |
Pilot
ring diameter
(does not rotate) |
2.559 |
65 |
|
B4800TS Mounting
| An adaptor
plate is required to mount the B4800 to a Velmex stage. |
To mount to
a UniSlide, use adaptor plate A6000TX |
To mount to
a BiSlide, use MSPP-3
Universal adapter plate |
 B4800
dimensional Drawing showing mounting holes details.
| Anchoring table base: There are two approaches
to securing the base of the table. First, there are two clearance
holes for 10-32 UNF cap screws for attachment from above through
the top access hole. |
Alternatively, to attach with screws
from below, there are four threaded holes. They are ¼"- 20
UNC - x ½" on a 4" diameter bolt circle. |
B5990TS
Photo 6
Gear ratios and performance
| |
|
At
maximum input of 600 RPM |
|
| Model Number |
Gear Ratio |
RPM
|
Time Per Rotation |
Speed
|
Degrees
per Step |
Typical
Backlash |
| B5990TS |
90:1 |
6 |
9
seconds |
40.2°/sec |
0.010* |
160
arc - second |
Rotary table speed is a function of motor and
driver choice.
*With 400 steps/rev motor.
| Specifications |
Model
B5990TS |
| Horizontal
capacity |
50 lbs. |
| Vertical
capacity |
5 lbs. |
| Cantilever
Load (Horiz. position) |
20 in-lb. |
| Table
top axial run out |
0.00011" TIR |
| Table
top radial run out |
0.00008" TIR |
| Accuracy |
100 arc - second |
| Repeatability |
1 arc - second |
| Table
weight |
2.7 lbs. with
motor |
| Max.
input shaft torque |
50 oz.-in. |
Download CAD drawings
Options
|
- Home switch/ Zero reference switch option
Photo 7
|
|
Applications
 |
Photo 8: A three axis (tilt, pan, rotate) system consisting of a motor in the base (theta 1, hidden), a tilt (theta 2), and a pan axis behind the platen (theta 3). The payload mounts on the platen. All three motors are controlled with our VXM - 3 programmable controller.
|
 |
Photo 9:
B4872TS Rotary Table with pin-indexed adapter plate supporting
a customer-provided chuck. |
 |
Photo 10: Three axes of
rotary motion perpendicular to each other
Three Series B4800 rotary tables
combined using A4001
XZ adapter bracket. These tables
are used to provide for altitude and azimuth, tilt and pan
or pitch and yaw motion.
|
 |
Photo 11: For lighter
payloads, a three axes system consisting of 1 B4800 model and
2 B5990TS units. |
 |
Photo 12: A combination
of electro and pneumatic rotary tables for production environment.The pneumatic table on the bottom provides quick, gross positioning
while the Velmex Model B4872TS Rotary table on the top provides
final, fine positioning. (The step motor has been removed.) |
 |
Photo 13: By adding a second zero ref switch, this table is limited to 90° rotation |
|
Photo 14: An A48 Rotary Table is used to support a three-jaw chuck which
holds jewelry (rings) for a custom engraving application.
Larger
view
Uses MB6000 UniSlide, right angle platform
and pneumatically driven engraver. |
|
)
)
)
