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RMI Laser, Лазерное оборудование, лазерный гравер, твердотельный лазер, оборудование для лазерной гравировки

Laser Engraving Systems & Fiber Laser Marking Systems – FAQs

 

Laser System Hardware Questions

 

Symptom Possible causes Solution
Unit does not appear to have power Unit not plugged in, improper connections, unit not turned on • Ensure that all power cords are properly attached (see cable connection chart on page 13) and plugged into a functional electrical outlet.
• Ensure that the key switch on the front of the Controller is in the ‘on’ position.
• Ensure that the on/off switch on the front of the Controller is in the ‘on’ position.
Unit appears to have power but does not respond to laptop commands Improper connections, F-theta lens cap in place, laser not turned on • Ensure all cables are properly attached between computer, Controller and Marker (see cable connection chart on page 13).
• Ensure that the F-theta lens protective cap has been removed.
• Ensure the ‘run-stop’ button has been released on the front of the Controller and the ‘laser on’ light is illuminated.
Unit does not engrave Improper focal distance, improper work piece positioning, loose cable connection. • Ensure that the surface of the work piece is positioned in the focal plane of the laser and that the work piece is located in the engraving field (see section on adjusting focal length, page 18).
• Check cable connections.
Unit engraves with poor quality Improper work piece positioning, improper marking parameters, improper work piece material, poor original graphics file • Ensure that the surface of the work piece to be engraved is positioned in the focal plane of the laser and is parallel to the bottom of the Marker (i.e. flat).
• Experiment with the Controller current and various marking parameters in SW-Pro to obtain the highest quality mark.
• Ensure that the laser is able to engrave on the work piece material (try engraving the desired mark on a different material).
• Verify the graphics files are clean prior to importing them into SW-Pro.
Unit will not engrave or engraves with poor quality Defective, damaged or misaligned unit • If none of the previously outlined solutions corrects the experienced problem(s) then please contact RMI Laser customer service.
Error Message:
Laser Stopped Estop, Key switch, or Interlock Activated.
Please check and fix the problem then press button
Emergency stop has been pressed or, The on/off key has been turned to the off position or, The interlock is open.
• Ensure that the emergency stop button is pulled out, the key on the Controller is turned to on, and the interlock is closed.
Error Message:
Laser Stopped Safety Violation.
Please check and fix the problem then press button.
“Laser on” signal lamp on Marker Head is not working. • Do not continue start up process. Immediately call RMI Laser customer service.

 

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Software Questions

1. Does RMI Laser’s Symbol Writer Pro Software import logos and graphics?

• Yes

2. What are the file types that RMI Laser’s Symbol Writer Pro Software imports?

• You can import any .jpg, bmp, tif, gif, plt, dxf, dwg, and svg file that you want. Please note that vector files must only have the marking data in the file. No drawings or anything extra as that will import as well.

3. What about Adobe Illustrator and Corel Draw Files?

• These files can be imported with a work-around RMI Laser has developed. Please contact RMI Laser Sales to discuss how to get this option with your laser marking system.

4. My barcode is not reading, what can I do to fix this?

• First of all, the material color is quite important. If you are marking on a white surface, no inversion or quiet zones are needed to get the barcode to read. If you are marking on a dark surface, you must invert the barcode and add quiet zones (QZ). If you are marking on a reflective or brushed metal surface, make sure you have good contrast, either inversion or no inversion is fine, and it is recommended to mark a filled rectangle first at low power to remove some of the polished effect.

Next, make sure that you resize your barcode using Module Width sizing. Not the typical drag and resize using the mouse. This will destroy the integrity of the barcode and will render it unreadable.

5. My Data Matrix is not reading, what can I do to fix this?

• Same as the barcodes, resizing of a data matrix must only be done by the Module Width sizing. Otherwise, you will destroy the integrity of the Data Matrix.
RMI Laser’s Symbol Writer Pro software allows the user to control sizing by cell arrangements or you can select the auto-sizing feature that will change your Data Matrices to the optimal size based upon your data input.

Additionally, Data Matrices will have trouble reading if your marking has over-filled the modules. To prevent this, you can reduce your marking parameters or you can change the Module Width Reduction to a value of 1 or 2. For larger Data Matrices, this number can be as large as 4. This will reduce the fill of the modules automatically providing you with a little faster marking that has much tighter filled modules. This will prevent any marking from over-filling the modules.

6. I imported an Image/Logo, but the clarity is not what I would like. What can I do to fix this?

• RMI Laser’s can provide very high-resolution markings (up to 1200 dpi in some cases). Thus, the best way to achieve clarity is to import the highest resolution graphic possible. RMI Laser’s Symbol Writer Pro software will dither the file and layout the dots perfectly for laser marking onto a variety of surfaces. If you do not have a high-resolution image, our software will import the file at its optimal size for laser marking. If you need it bigger, you can resize but the image quality will suffer. You can adjust the image’s brightness and contrast to improve quality.

Please note that if you are marking a picture file onto a dark anodized aluminum surface, that you will in fact have to invert the file to get the proper imaging to appear. Right click anywhere empty in our software’s composition grid and you can change the background color from white to black. This will assist with your imaging onto darker substrates.

7. My marking is not the contrast that I need it, what settings should I adjust to fix this?

• To get a darker contrast with our laser systems, the best settings to change are pulses and step size. Pulses allow you to hit individual pixels multiple times before moving to the next giving you a darker contrast and a little more depth. Please note that excessive pulsing can actually cause carbon build-up, which can easily be removed, and raises the marking from the material’s surface. Step size allows you to change the spacing of these pixels or dots. You can space dots away from each other, or you can move dots so close that they overlap. Please note that changing your step size does in fact change your marking resolution. The higher the value, the lower the resolution and the quicker your mark will be. The lower the value, the slower the marking gets as you can create more dots to mark. For filled items, this will ensure no space goes unmarked. If you are marking an image, this will over-fill your pictures giving a blurry effect. Do not go below a step size value of 40 for pictures.

8. I need to engrave into my metal, what settings can I adjust to get this effect?

• Depending on your laser series and wattage, engraving can range from .004” to just a few microns. Our lower power models can get depth but it is going to take a lot of passes and time to get that depth.

The best way to get depth with any of our lasers is to make passes with a step size of lower than 30. You can make more passes in the same time with a higher step size but depending on your substrate, you might not get the depth you need. You can add pulses to assist this, no more than 10 with our 10 to 20 watt systems, no more than 20 with our lower wattage lasers.

9. My focusing dots are not aligned any longer. How can I get them back to overlapping at the focal point?

• First of all, you have to find the focal point again manually. This requires you bypassing the interlock if your setup is class 1, so we recommend that you contact RMI Laser Customer Service to ensure this is done safely. There are also instructions in your laser system’s user manual that will explain this procedure to you.

Once the focal point is found manually, you simply take a flathead screwdriver to focus the external aiming diode to match the size of the aiming diode from the laser marking head. Then, adjust the hardware so they overlap at the focal point you found manually and you are done.

 

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Frequently Asked Questions about Fiber Lasers

1. I’m currently using lamp pumped YAG lasers in my application. What advantages would switching to fiber lasers offer me?

• Electrical efficiency of greater than 28 % wall plug efficiency vs. 1.5% to 2% for lamp pumped YAG
• Cost savings from no replacement of flash lamps: Long life telecom grade single emitter diodes lifetimes greater than 100,000 hours used in fiber lasers vs. flash lamps
• Fixed spot size and spot profile at all power levels
• Maintenance free or low maintenance operation
• Minimal spare parts
• Air-cooled or minimal cooling requirements
• Substantial reduction in laser footprint
• Longer working distance
• No requirement for alignment
• No warm-up/instant on

 

2. Your competition claims that back-reflection is a problem with fiber lasers. Is this true?

• These statements come from people not familiar with fiber laser technology. Our multi-kilowatt low mode fiber lasers are not susceptible to back reflection issues if the appropriate delivery fiber is utilized. With single-mode lasers they in most cases do not have a problem, unless highly reflective materials are processed. However, if the back reflection is too high, the units sense the reflection and automatically shut down. The addition of an isolator eliminates this issue. IPG have numerous units in the field cutting and welding highly reflective material such as copper and aluminum on a production basis.

 

3. How can you be so confident that your diodes have this life-time?

• IPG Photonics percent tests 100% of their diodes before they are certified for a laser or amplifier. Duration of the test generally is longer than 1,500 hours when diodes are operated at stressed conditions, greatly elevated temperature and current. If the diodes pass this test with no drop off in power they are certified for usage in our devices. Whether the diode is used for a 10kW fiber laser for materials processing or a broad band fiber amplifier for telecom, the similar procedures are followed. IPG is now the largest manufacturer of single emitter multi-mode diodes with the most extensive diode test facility in the world. This is also backed up with over 650 multi-kilowatt fiber lasers now in production applications with many in operation over 5 years.

 

4. Can the same fiber laser both cut and weld?

• The same fiber laser can do cutting, welding, drilling and cladding. Many customers have purchased a fiber laser with a 2-way, 4-way or 6-way beam switch. For example, one leg will have a 100 micron fiber for cutting, a 200 micron for welding and 400 or higher for cladding or annealing. The power can be changed to a different level and switched to a new delivery fiber in a matter of milli-seconds. Delivery fiber can support multiple work stations of up to 200 meters apart.

 

5. Why are fiber lasers more efficient than other solid state and gas lasers?

• The answer is simple – the design of fiber lasers generates less heat and manages the heat they generate effectively. The quantum defect (that is the difference between pump and emission energy) is lesser for a Ytterbium diode pumped fiber laser (pumped at 980 nm) than a Nd: YAG diode pumped laser (pumped at 808 nm). Also, the optical to optical conversion efficiency of fiber laser is typically 70-80%, as compared with approximately 4% for lamp pumped YAGs, and approximately 40% for diode pumped YAGs and disk lasers. Because the light is always contained in a fiber, there are no additional sources of the loss inside the laser cavity.

 

6. How much can I save if I switched to fiber lasers?

• Users can save significant savings from using fiber lasers in their production. The amount you can save depends upon many things including your current process, materials, production environment, electrical and labor costs. Here are some of the savings:

- a. Higher Wall Plug Efficiency: Fiber lasers have unrivalled efficiency when compared to existing conventional laser technologies:

Type Wall Plug Efficiency
Fiber Laser Ytterbium (Yb) 28%+
Lamp-pumped YAG 1.5% - 2%
Diode-pumped YAG 10% - 20%
Disc 15% - 25%
CO2 5% - 15%


- b. Cooling: The efficiency of the fiber laser also contributes to lower cooling requirements, which contributes to lower electrical usage. Lower power fiber lasers require only air cooling. Higher power fiber laser require water cooling that is generally more simple and less costly than for equivalent alternative laser technologies. Cooling also depends upon your particular production environment.

- c. Consumables/Replacement Parts: Because of the highly efficient design of fiber lasers (better thermal management) and the use of telecom-grade single emitter pump diodes in our fiber lasers, you can save on replacement parts (such as lamps and diode bars), labor and production down time. Many lamps and diode bars used in YAGs have estimated lifetimes of 2,000 hours and 20,000 hours, respectively. These are a fraction of the MTBF of IPG’s single emitter diodes of > 100,000 hours which mean that for the life of the fiber laser, you should not have to replace the diodes. In the all solid-state fiber-to-fiber design of IPG’s lasers, you save even further because there are no optics to adjust or maintain, such as resonators mirrors, crystals, fluids and filters, as in conventional lasers.

- d. Maintenance: Fiber lasers require no or low maintenance, depending on the output powers and other factors, as compared to conventional lasers. There are no optics to align and no warm up-times, as well as consumables/replacement parts. As a result, you can save substantial sums on maintenance.

- e. Capital costs: With fiber lasers, the same laser can cut, weld and drill, allowing you to lower your investment costs as compared to purchasing and maintaining different lasers and laser systems for each of these functions.

 

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