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This page contains some of most common questions posed by
potential customers. We hope these questions and answers address your questions and
concerns as well. We have devided The questions into categories so your area of interest can
quickly be accessed.
We'll start with the most
frequently asked question about J. R. Jet:
Q: Why was J. R. Jet started, when there
were other waterjet companies around?
A: J. R Jet believes there are advantages
in providing water powered machine tools at a lower cost. Traditional waterjet suppliers have provided only
straight water cutting or abrasive cutting tools. This has resulted in many parts being placed on a second machine
to perform the final machining. JR Jet provides in addition to the standard cutting nozzles a HP water spindle which on the same machine which reduces the amount of time and cost by utilizing a single power source and single machine. We have concentrated on producing a quality machine capable of producing a quality part. J. R. Jet brings to the market precision, ease of use, and a standard product line which is expandable to market future needs.
Materials
Q:
Are there special considerations for making glass parts?
Q:
What is the thickest material the J. R. Jet can cut?
Q:
How should the material be fixtured?
Pumps
Q: What
size pump would be best?
Q:Which Pump should I use?
Q: what size pump should I use?
Software
Q:
When I purchase a machine from J. R. Jet, what software do I need and who can provide it?
Q:
Why should I use software produced by other vendors?
Q:
Do I need Nesting software?
Q:
What software options does J. R. Jet offer?
Q:
Is it possible to create geometries without knowing anything about Cad-constructions?
Q:
Can the software make unfolding of complex 3D-geometries?
Q:
Can the software be used for both metric and inches?
Q:
Is it possible to convert many small short lines to longer lines or to arcs?
Q:
Is there a tool to optimize bad drawings?
Q:
Has the software tools for design of Signs?
Q:
Can the software convert pictures and photos to CAD-objects?
Q:
Are there some special tools for tile making?
Q:
Is it possible to automatically make tool paths?
Q:
Is it possible to make a partial cut on a part?
Q:
Does the software support marking?
Q:
Does the software support cutting with multiple heads?
Q:
Is it possible to calculate cutting time and material cost in the software?
Q:
How is the software optimized for Abrasive Water Jet cutting?
Q:
Is it possible to create or change your own postprocessors?
Q:
What is Part Manager?
Systems
Q:System Question 1(To Be Added)
Q: System Question 2(To Be Added)
Q: System Question 3(To Be Added)
Q: System Question 4(To Be Added)
Q:
System Question 5(To Be Added)
Q:
What does it take to maintain an J. R. Jet Machining Center?
Q:
What does it cost to run?
Q: Why
are cuts made under water, and can I cut above water if I like?
Q:
System Question 9(To Be Added)
Nozzles
Q: What is the smallest kerf width
that can be cut and what is the smallest a part can be made?
Q: Nozzle question 2 (to be added)
Materials
Q: Are there special considerations
for making glass parts?
A: Yes. Dual pressure piercing
allows for piercing of glass with minimal risk of cracking. J. R.Jet Machining®
Centers come standard with dual pressure capabilities. Using
these techniques reduce the risk of cracking, making glass cutting into a
very profitable venture.
Q: What is the thickest material the
J. R. Jet Machining Center can cut?
A: The practical limit for most materials and conditions is about
two inches thick. Thicker than that, and tolerances drop while machining
times increase. For some special projects, however, it is practical to
machine material five or more inches thick. Cutting titanium is one such
application where J. R. Jet customers report great profits at these greater
thicknesses.
The machine physical limit is the
maximum Z-axis travel, which is dependant on the specific machine purchased.
Q: How is the material fixtured?
A: There are many methods of
fixturing the material down. The simplest is simply to place a plate of
material on the machine, and anchor it with weights. More advanced fixturing
can be employed if needed for specialty applications or secondary machining. However,
the simplist manner is usually the most effective.
(See also waterjet
brick.)
Pumps
Q: What size pump would be best?
A: This depends on the kind of work
you want to do. If working in very thick metal, get a pump that is capable of
putting a lot of horsepower to the nozzle. Although a smaller pump can
machine thick metal, a larger pump will be faster, and therefore more
practical. If cutting mostly thin metal, or doing water-only cutting, get a
smaller pump. Smaller pumps are often cheaper, cost less to run, are easier
to maintain, more reliable, and are quieter.
For example, a 50 hp (37
kW) intensifier pump will typically only put 30 hp (22 kW) to the nozzle.
Examine the price and maintenance differences between the different sizes of pumps,
Q: What is the difference between an
intensifier and a
crankshaft pump?
A: The two share the same basic
pumping principal: a plunger is pushed into a closed chamber to raise
pressure and expel fluid through an outlet check valve; as the direction of
the plunger is reversed, low pressure fluid enters the chamber through an
inlet check valve. The difference between them is only how the plunger is
moved. The crank or direct drive pump uses a crank similar to the one in an
automobile engine. The intensifier drives the plunger with a hydraulic
cylinder usually with oil.
The intensifier pump is not
as efficient as a crank pump. It has pressure ripples and is noisy, but it does
have a longer seal life and is more suited to 24-hour operations using multiple
independent nozzles. The crank drive pump is quieter,using less power.
Q: What other differences does a
different size pump make?
A: The more horsepower that makes it
to the nozzle, the faster you can cut. The trade-off with a higher horsepower
pump is cost, effeciency, a larger kerf width, and sometimes a slight loss in
precision. However, a high horsepower pump can almost always be run at lower
pressures to reduce the operating cost and maintenance, and then run at
higher pressures for special jobs that would otherwise try your patience.
Software
Q: When I purchase a machine from
Jr. R. Jet, what software do I need and who can provide it?
A:
For the 2 1/2 and 3 axis systems J.R. Jet provides all the software necessary
for producing parts. The standard 2d system contans software for drawing or importing the part
at the machine. The system accepts files from most commmon CAD packages.
Once a part is drawn or imported the CAM software post processing the part.
A system purchased comes with a floating license allowing the operator to process parts
either at the machine and off line.
Five axis and greater machines utilize Software available from other suppliers.
J.R. Jet has worked with these companies to develop post processors that will work
with your 5ive axis machine. A listing of available vendors can be provided.
Q: Why should I use software produced by other vendors?
A: The Vendors have placed their expertise in producting
software that meets the need of their customer. J. R. Jet has placed their expertise in the
construction of these five axis machine tools. Insuring this equipment continues to meet
and exceed the performance required by our customers.
Q: Do I need nesting software?
A: Nesting software is available which works with software provided by J.R. Jet. This software is available at a nominal cost to the user needing nesting capability.
Q: What other software options does
J. R. Jet offer?
A: J. R. Jet also provides Organizer software.
This is an SQL based product allowing the user to organize parts, sheets and production.
The system contains a user configurable report sytem which is easy to costomize.
Q: Is it possible to create geometries without knowing anything about Cad-constructions?
A: We have a plug-in that handles parametric parts. By using parametric parts you can easily create more than 50 kinds of parts. The parametric parts are also fully open and scripted using LUA so you can easily add your own parametric parts.
Q: Can the software make unfolding of complex 3D-geometries?
A: We can make unfoldings of different standard geometries, but there is for the moment no possibility to work with 3D-geometries made in other 3D-systems.
Q: Can the software be used for both metric and inches?
A: Yes, You can select metric or inches in the format menu.
Q: Is it possible to convert many small short lines to longer lines or to arcs?
A: The software has a tool that converts vectorized information to arcs or longer lines. The function reduces the number of nodes dramatically.
Q: Is there a tool to optimize bad drawings?
A: Yes this is a very important tool if you import files from other system. The Clean Up command removes all double and overlapped objects, it also heals gaps between objects. Clean Up can save many hours every week if you receive many drawings from other
companies.
jrjet Layout
Q: Has the software tools for design of Signs?
A: One very nice tool is the FontTracer. This command converts symbols and text fonts to CAD-geometry. The result from the font tracer is an optimized geometry that can be scaled to any size whiteout loosing
accuracy.
Q: Can the software convert pictures and photos to CAD-objects?
A: Yes, we support many different file formats. We convert the picture to a vector format with either outline or single line scanning. When using a picture the best result will be if the picture have a high resolution and contrast. The picture can be created from a scanner or a digitalcamera.
Q: Are there some special tools for tile making?
A: Yes we have several tools for this. By using the B-poly command you can click inside an area and the program constructs a polyline that follows the area outline. The power of this tool can be use for many
purposes.
Q: Is it possible to automatically make tool paths?
A: The software has an Auto command that automatically adds tool paths to one or many parts at the same time. You get the best material utilization if the tool paths are added to the parts after they have been finally located on the
sheet.
Q: Is it possible to make a partial cut on a part?
A: The best way of doing this is to use the manual command. By this command you can create a tool path object by object and it’s possible to control all movements
exactly.
Q: Does the software support marking?
A: Yes. Here we have the same possibilities as for cutting.
Q: Does the software support cutting with multiple heads?
A: This functionality is very powerful. You can cut with 1-8 cutting heads at the same time. The different cutting heads can be switched on or off during cutting, and the software can at the same time change the distance between the heads. How this works depends on the machine construction. IGEMS can create CNC-file for manual adjustment or for advanced automatic head
control.
Q: Is it possible to calculate cutting time and material cost in the software?
A: It’s very easy to do this. You can just make a part, add a tool path and you get an estimated cutting- and material cost (also the cutting time). The Estimate cost command reads all information from the machine and material database. This database is open and can be edited by the
user.
Q: How is the software optimized for Abrasive Water Jet cutting?
A: AWJ-cutting requires an advanced feed optimization to be able to combine a good cutting result with a short processing time. When cutting a lag of the beam will occur. The size of the lag gets larger the higher the feed rate.
The lag often causes great problems when changing directions and results in the geometry on the downside of the material to not coincide with the geometry on the upper part of the material. The problems increase when using thicker materials and faster feed rates.
There are two different methods to be used in AWJ-cutting.
1. You can use such a low feed rate so that there is no lagging. This method means that the cutting will take a long time.
2. Use as high a feed rate as possible and then adjust the speed before and after a change in direction. This method requires an advanced feed optimization and results in a high cutting quality and fast cutting.
Q: Is it possible to create or change your own postprocessors?
A: The postprocessors provided are open text files. The postprocessor use a computer language called LUA. The postprocessor technology is very powerful and you can make postprocessors for all kinds of machines.
Q: What is Part Manager?
A: Parts Manager(Organizer) is an administrative tool. Using a SQL database Organizer keeps track of parts, sheets, rest sheets, productions etc. With Organizer you will get control of the production process.
Systems
Q: System Question 1/span>
A: system answer 1
Q: System Question 2
A: System Answer 2
Q: System Question 3
A: System Answer 3
Q: System Question 4?
A: System Answer 4
Q: System Question 5?
A: System Answer 5
Q: What does it take to maintain an
J. R. Jet Machining Center?
A: When operating at high pressures,
there is typically more maintenance required than most traditional machine
tools. However, the maintenance is relatively easy to do. Anyone with a basic
mechanical aptitude should be able to properly maintain the machine.
Q: What does it cost to run a J. R. Jet
Machining Center?
A: This is dependant on the model of pump you choose.
Q: Why are most 2d cuts made under water,
and can I cut above water if I like?
A: Cutting under water is typically
used to reduce the noise and splash. It is normal practace for 3d cut parts to be cut
above water and be fixtured to a main tool plate.
Q: System Question 9
A: System Answer 9
Nozzles
Q: What is the smallest kerf width
that can be cut and how small can a part be made?
A: Nozzle Question 1 Answer
Nozzles
Q: Nozzle Question 2?
A: Nozzle Question 2 Answer
Under Construction
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