MicroFab Technologies MJ-AB-01 Manuel utilisateur
MicroFab Technologies, Inc.
www.microfab.com
MJ-AB User’s
Manual
MJ-AB User’s Manual
MicroFab Technologies
1104 Summit Avenue, Suite #110
Plano, Texas 75074
Phone 972.578.8076 • Fax 972.423.2438
Notice:
The information contained in this document is subject to change without notice.
MicroFab makes no warranty of any kind with regard to this material, including but not limited to, the implied
warranties of merchantability and fitness for a particular purpose. MicroFab shall not be liable for errors
contained herein or for incidental or consequential damages in connection with the furnishing, performance, or
use of this material.
Warranty
The MJ-AB jetting device is warranted against defects in material and workmanship for a period of thirty days
from date of shipment. During the warranty period, MicroFab will, at its option, either repair or replace devices
that prove to be defective.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer,
Buyer-supplied software or interfacing, unauthorized modification or misuse, or operation outside of the
environmental specifications for the product. MicroFab makes no claim that the jetting device will perform
with all fluids introduced to the device, or that the device will work at all frequencies and operating parameters
selected by the Buyer.
MicroFab Technologies
1104 Summit Avenue, Suite #110
Plano, Texas 75074
Phone 972.578.8076 • Fax 972.423.2438
Equipment Series: MJ-AB Jetting Device
Mfg Date: Indicated by device Serial No.
General Safety Considerations
Warning The jetting device itself presents no general chemical hazard. However, safety measures
should be followed as outlined in the MSDS for fluids to be dispensed.
Warning If this product is not used as specified, the protection provided by the equipment could
be impaired. This product must be used in a normal condition only (in which all means
for protection are intact).
Table of Contents
SECTION 1 - GENERAL INFORMATION 1
Introduction ...............................................................................1
Technical Specification.............................................................1
Facility Requirements................................................................2
Pneumatics ..................................................................................... 2
Electrical......................................................................................... 3
SECTION 2 - EQUIPMENT RATINGS 5
Supply Voltage...........................................................................5
Range of environmental conditions...........................................5
EQUIPMENT INSTALLATION 5
Unpacking and Inspection.........................................................5
Assembly....................................................................................6
Instructions for Protective Earthing..........................................6
Ventilation .................................................................................6
EQUIPMENT OPERATION 7
Hardware Overview ...................................................................7
Principles of Operation ..............................................................8
Initializing Jetting Hardware.....................................................8
Setup steps: .................................................................................. 10
Notes: ............................................................................................ 11
SUPPLEMENTAL PARTS 12
FACTORY SUPPORT 13
MJ-AB USER’S MANUAL
Section 1 - General Information
Introduction
MicroFab’s MJ-AB jetting device has been developed to dispense single drops of
solvents, water-based fluids, and inks. With proper fluid preparation and device
maintenance, the jetting device will provide reliable delivery of fluid micro-drops.
Figure 1 - MJ-AB-01 Jetting Device
Technical Specification
The MJ-AB jetting device design has successfully jetted a wide variety of fluids.
Performance of the jetting device is closely tied to the characteristics of the fluid in use.
Typical fluids successfully jetted in this device have viscosities less than 40 centipoise
and surface tensions in the range of 0.02-0.07 N/m. Fluids with properties outside
these limits can be jetted if changes to the properties can be achieved with solvents or
changes in temperature.
The jetting device can be provided with orifice sizes ranging from 30-60 microns.
Depending on the operating parameters and the fluid, these devices can produce drops
ranging from 50-200 picoliters in volume.
Operating Range
Operating temperature between 20 and 150°C.
Physical Dimensions
Physical dimensions are shown in Figure 2.
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MJ-AB USER’S MANUAL
Figure 2 - Device Dimensions
Power Requirements
Required power - 115VAC/2A max; 50/60 Hz (for JetDrive electronics;
JetDrive can also be configured for 240V installation).
Facility Requirements
The jetting device, by itself, requires no connection to lab or machine power.
However, the support equipment for the jet does require some typical lab support.
Figure 3 - Fluid & Electrical
Electrical signa
l
Fluid Inlet
Pneumatics
Depending on the viscosity and contact angle of the fluid, the jetting device can require
either positive or negative pressure at the fluid inlet. There are two typical ways to
provide this backpressure. First, the backpressure can be provided by either a positive
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MJ-AB USER’S MANUAL
or negative pressure head provided by positioning the fluid reservoir. If the reservoir is
mounted a few inches above the jetting device, a constant positive pressure will be
provided. If it is mounted a few inches below, the orifice will realize a negative
pressure.
The second approach is to regulate existing compressed air or vacuum sources. By
inserting a pressure or vacuum regulator between the source and the jetting device, the
pressure can be adjusted. MicroFab provides such capability in it’s CT-PT-01
pneumatics panel. In this case, the lab facilities must provide a +15 PSIG source,
either through an air compressor or through a compressed gas tank. For negative
pressure, the regulator should be connected to a vacuum source of –24 in. Hg.
The two installations are shown side by side in Figure 4.
Figure 4 - Back Pressure Control
Pneumatics Panel
Reservoir
Jetting Device
Electrical
In order to generate drops, a pulse is sent to the PZT surrounding the glass capillary.
The shape of this waveform is shown in Figure 5. The minimum to maximum range
Figure 5 - Waveform Definitio
n
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MJ-AB USER’S MANUAL
for the jetting device is listed in Table 1.
Table 1 - Voltage Pulse Parameters
Voltage level 1 0 to 100 V
Voltage level 2 -100 to 0 V
trise 1 – 300 µs
tdwell 3 – 800 µs
tfall 1 – 300 µs
tech 3 – 800 µs
tfris 1 – 300 µs
Frequency 1 Hz to 20 kHz
MicroFab offers a controller (part no. CT-M3-01) that has been designed to meet or
exceed these parameters. However the same function can be accomplished by
properly implementing a waveform generator and a voltage amplifier from qualified
manufacturers. It is important in either arrangement, however, to make sure that the
output connector from the voltage source mates with the connector provided on the
jetting device.
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