Velmex offers two rotary tables designs. Click
on either image for details.
5" diameter Series B4800TS. Choice
of three gear ratios:72, 36 and 18:1 Photo 1: Model B4836TS Rotary Table More Information.
Load Capacity
= 200 lbs. DRAWING DOWNLOAD:2D.pdf
2D DXF file;
3D .SAT
, 3D.STP
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. compression load
100 lbs. tensile load
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.
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.
400 count encoder attached to dual shaft motor provides 0.01° resolution
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.
Watch a video of similar system below.
<Video
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.
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