DSM - Somos 9120/9420 EP White - User Guide
Contents
1. Solutions Make sure the unsupported Inset value in the FinePoint support editor is not too small This will ensure that the supports attach to the edges of the bottom layer Unfortunately this value is not retained and needs to be changed after the support generation for each part We found that 0 010 inch 0 254 mm worked well on our SLA 7000 but it should be determined for each machine Make sure there is sufficient fill cure depth on the bottom layer Check border overcure value on supports Use sufficient border overcure for the supports and sufficient penetration of the support into the bottom of the part Have the physical blade gap on your recoating blade checked For Zephyr blades set the blade gap to 0 004 inches 0 102 mm For doctor blades set the blade gap to 0 006 inches 0 1524 mm Watch the building of the first few layers of the part to see that the surface is being coated properly with resin Check for signs of resin starvation or dewetting 11 Unlimited D S M Solution Use minimal values of fill cure depth on the down facing layers of the part The suggested minimum values are 0 005 to 0 006 inches 0 127 to 0 152 mm Ensure that there is sufficient time between the scanning of successive layers This can be a combination of scanning time recoating time and pre dip delay and Z wait time Over sixty seconds is normal for a platform of parts and should be sufficient Solution Use slower scanning2. J gt Rinse the parts with isopropanol and dry with compressed air before post curing For an automated wash such as with the Ramco System please do the following gt Ina unit containing solvent submerge the parts for 20 minutes of agitation followed by 5 minutes of drain time gt Spray the parts with solvent or water and immediately dry with compressed air gt Spray part one last time with clean solvent dry with compressed air and inspect for cleaning efficiency 8 Unlimited D S M Cleaning Procedures Remember Y vVYVYVYN V Y When handling objects fabricated from DSM Somos resins in a partially cured state after initial laser cure wear nitrile or other chemical resistant gloves to avoid skin contact Because of the low viscosity of Somos 9120 and 9420 EP White extra care should be taken to prevent drips If a drip does occur it should be wiped up immediately Ali cleaning solvents should be kept clean and free of debris or excessive resin When draining parts take care not to expose them to actinic light Parts can be rinsed with water after rinsing with solvent but do not let them soak in water for more than one minute Wash hands regularly after handling resin Parts cleaned in isopropanol alone will not be completely clean because Somos 9120 and 9420 EP White is not completely soluble in isopropanol Make sure parts are completely dry free of solvent and or water before placing in the
3. post cure apparatus otherwise parts could be tacky 9 Unlimited D S M Post Cure Procedures In order to achieve optimal mechanical and physical properties parts should spend 60 minutes in the Post Cure Apparatus PCA If parts are of a suitable shape each side should be cured for thirty 30 minutes Remember Jue The amount of time a part spends in the PCA correlates directly to its finished quality In addition to inadequate exposure in the PCA poor lamp quality can limit the strength of the part causing further complications with secondary techniques Le rubber tooling A longer exposure in the PCA with lower quality lamps is not a substitute for using better quality lamps PCA lamps must be new less than 2000 hours of use and should be an alternating mix of Philips TLK 40 8 05 and TLK 40W 03 lamps or equivalent To prevent discoloration parts should be stored in a dark or non ultraviolet light environment Parts should be cleaned and dried completely before being placed in the PCA vyv VY Overcuring the parts may lead to increased stiffness while undercuring the parts may lead to sticky sidewalls 10 Unlimited D S M Below are documented cases of common problems and possible solutions Consult this part of the guide if you are having difficulties and do not hesitate to contact us via TS Fast as discussed on page 2 Delamination occurs on the bottom layer of parts at the corners edges
4. Table of Contents Introduction TS Fast Safety Preparing the Machine Build Parameters Cleaning Procedures Part Post Cure Trouble Shooting Appendices Viscosity Monitoring Vat Replacement Contact Information wii DSM Somos 9120 9420 EP White User s Guide Robust Accurate Functional Epoxy Resin for Stereolithography For Solid State Laser Systems 335nm A White Material that Mimics Engineering Plastics Description DSM Somos 9120 9420 is a liquid photopoly mer that produces robust functional and ac curate parts using stereolithography machines The material offers superior chemical resis tance a wide processing latitude and excellent tolerance to a broad temperature and humidity range during and after build Parts created from Somos 9120 9420 exhibit superior fatique properties strong memory retention and high quality up facing and down facing surfaces Somos 9120 9420 also offers a good balance of properties between rigidity and functional ity The resulting part properties are ideal for master patterns in rubber molding applications This material is also useful in creating parts for applications where durability and robustness are critical requirements e g automobile com ponents electronic housings medical products large panels and snap fit parts Application Somos 9120 9420 Photopolymer is used in the solid imaging process to build thr
5. ch side of the blade If there is any residue it can be wiped off gently with the proper tool Remember Que Always check the Zephyr blade after any build crash or other adverse event that may cause a change in the gap before beginning a new build Que Also check that the resin level in the blade is set to the haltway point On builds with large flats or trapped volumes check that the blade isn t running out of resin and giving incomplete part recoating due to resin starvation 5 Unlimited D S M Preparing the Machine Disposal of Used Res Partially or uncured UV material waste may be classified as hazardous in some areas thereby requiring special packaging transportation and disposal Contact the governmental body which regulates waste disposal in your area to ascertain what disposal protocols exist The packaging transportation and disposal methods which are used must prevent any form of human contact with the waste even if it is classified as nonhazardous or unregulated This precludes the use of disposal methods which will result in groundwater or surface water contamination Clean up solvents should be isolated in a sealed marked container and disposed of as hazardous waste in accordance with all applicable laws and regulations Clean up materials soiled clothing empty containers etc should be disposed of in accordance with the preceding guidelines Whenever any of these contain uncured or partially cured UV curab
6. ee dimen sional parts DSM Somos 9120 9420 EP White can be used as a general purpose resin and is sui able for snap fit parts RTV patterns and living hinges wii DSM Technical Service Fast For prompt response to your questions regarding the proper use of Somos 9120 and 9420 EP White contact us via our TS Fast service on our website Log on to www dsmsomos com From the main page click the link in the dark blue column under Somos at Your Service TS Fast Link Somos at Your Service click here for Immediate Technical Support Fill out all of the required information on the Technical Service Request form and click Submit Your request will be processed within 15 minutes and a text message will be sent to a DSM technical service representative who will contact you promptly TS Fast Service Request Form 2 Unlimited D S M Pb To avoid personal injury please adhere to the following guidelines Read and understand the Material Safety Data Sheet MSDS before using the resin Somos 9120 and 9420 EP White has a very low viscosity therefore it is important to avoid contact with eyes skin amp clothing by wearing Personal Protective Equipment PPE Safety Glasses Goggles Gloves Laboratory Coat Keep the work area clean Avoid spreading resin onto clean surfaces If resin is found on clean areas it should be cleaned off immediately with a dispo
7. ember gt When the resin is installed in tho machine start to measure and record the viscosity once each week iv Unlimited D S M Appendix A Viscosity Monitoring Approximate Seconds Viscosity CPS v Unlimited D S M Appendix B Vat Installation Procedure For the SLA 3500 500 5000 and 7000 please follow these instructions for installing a new vat YY YY VY VY Y Y Remove front cover of the SLA and drip pan if present Verify that the vat pads on the new vat are the same type and same position as the pads of the original vat Apply a thin coat of grease to the vat pad where contact is made with the vat jacks channels Unload old vat using machine software With old vat removed resin removed from all surfaces SLA chamber floor clean elevator at its upper limit and vat jacks in the unload position roll the empty new vat into the chamber for fitting Using the machine software raise the vat jacks until they contact the vat pads Verify that the jack posts are seated in the vat pad channels Continue to raise the jacks which are now raising the vat to a point just below the bottom of the rim Lower the elevator slowly until the unit is in the rim Check the clearance between the Vat walls and rim Vat walls and blade Vat walls and elevator arms Vat walls and leveling system If vat is full lo
8. he DOS prompt to enter back into the menu program Verify that the heater is on and set to 30 C Before starting a run verify the laser is on and up to full power v wii DSM Contact Information Ordering and Customer Service U S amp Canada Tel 800 222 7189 within the U S and Canada 41 847 468 7809 outside the U S and Canada Fax 1 847 695 1748 DSM Somos 1122 St Charles St Elgin IL 60120 Europe Hoek van Holland The Netherlands Tek 011 31 174 315530 Fax 011 31 174 315391 DSM Somos Slachthuisweg 30 3151 XN Hoek van Holland The Netherlands Asia shanghai China Tel 86 21 61418188 Fax 86 21 61417008 DSM Somos 11F The Headquarters Building No 168 Middle Xi Zang Road Shanghai 200001 China Log on to WWW ASMSOMOS COM for more information wins DSM Contact Information Technical Service U S amp Canada John Schaefer 512 848 0570 john schaefer dsm com Greg Renshaw 248 819 9432 greg renshaw dsm com Rick Thomas 224 402 0962 richard thomas dsm com Jon Spragg 224 402 0917 jonathan spragg dsm com Europe Hoek van Holland The Netherlands Philippe Barcet 33 67 34 77 482 philippe barcet dsm com Asia Shanghai China Li Ji Hong 86 137 0177 0771 Ji Hong li dsm com Technical Service information is also available through our website Please refer to page 2 of this guide or Log onto WWW ASMSOMOS COM for more information wii DSM C
9. le materials the disposal method must preclude any form of human contact including any which could result in groundwater or surface water contamination 6 Unlimited D S M Build Parameters Style files will be provided by your technical service representative If any problems arise with styles provided use the TS Fast system to allow the tech service team to handle the problem at www dsmsomos info tsfast 9120 and 9420 are very similar and will run properly if the machine is setup with the correct build styles and Ec Dp values These are included in the table below 9120 and 9420 10 9mJ cm 0 14mm 0 0056 inch G5mJ cm 7 Unlimited D S M Cleaning Procedures The most effective method of cleaning parts is to sequentially wash them in solvent baths of increasing purities For parts made with Somos 9120 and 9420 EP White DSM Somoserecommends washing them with TPM After draining the platform use the following basic steps to clean your parts gt Wash the parts in a solvent bath with higher levels of resin and drain X Rinse parts with clean solvent gt Dry parts with compressed air For washing parts by hand please do the following gt Immerse the parts in TPM for about 5 minutes with agitation If surface appearance is not an issue a bristle brush may also be used gt After thoroughly draining the platform immerse the parts in isopropanol for 5 minutes with agitation Drain
10. n is removed from all surfaces of the vat Clean the zephyr blade inside and out Clean the elevator arms Clean resin from all surfaces inside the build chamber Place the empty and clean vat back in the vat drawer Fill the vat to 1 2 inch below the fill ine This will allow plenty of room for the resin to expand as it warms and prevent spills when pushing the vat drawer back in Push the vat drawer in till it stops If the chamber door will not close the vat is not in far enough Load the vat with the menu software If the resin file does not exist create one for the new resin The resin files are in the c resin directory Load the resin file in the Change Resin Utility and verify that the Ec and Dp are correct In the Recoater Utility start the Adjust Resin Level utility and add resin if necessary Verify that resin is about 1 2 way up the window in the zephyr blade If it is not use the vacuum adjustment on the lower left wall of the build chamber to set it properly 2 screws need to be removed to access the adjustment knob Verify the build start position is correct The platform should be 1 2 out of the resin Using the software move the elevator below the recoat bar iv Unlimited D S M VVVVVY Appendix B Vat Installation Procedure Exit the menu program At the DOS prompt type recoater zoff Using the software verify that the sweep works correctly then exit the Recoater Utility Type menu at t
11. ontact Information Sales U S amp Canada Tom Rohrbeck 224 402 0954 thomas rohrbeck dsm com BE Charlie Kaufmann 302 897 4658 charles kaufmann dsm com E Scott Nordlund 224 402 0923 Scott nordlundQ dsm com E Alaska B Hawaii E Washington D C Europe Hoek van Holland The Netherlands E Amaud Guedou 33 60 84 10 663 arnaud guedou dsm com r1 Anna Hoiss 49 1722 4401 80 anna hoiss dsm com Asia shanghai China E disons 486 137 0177 0771 Ji Hong li dsm com Log on to WWW dSMSOMOS COM for more information Unlimited DS M
12. sable paper towel and isopropanol Wash hands regularly after handling resin Provide Adequate Ventilation Prevent build up of volatile substances from resins and solvents Remove dust from clean amp finished parts To avoid contact with partially cured resin DO NOT touch green parts without wearing the proper PPE 3 Unlimited D S M Storage 9420 contains a pigment that may settle out over an extended period of time while inside the container and vat of the machine To ensure homogeneity the container should be rotated periodically 1X week Machines left idle for an extended period should have a scheduled vat stir with the machine software go to Setup then stir resin for at least one hour 4 Unlimited D S M Preparing the Machine Installing a New Vat For machine specific vat installation and resin replacement please consult Appendix B of this guide Replacing Resin Be sure to clean out the vat thoroughly properly disposing of used resins and cleaning materials solvents paper towels etc and consult Appendix B of this guide Machine Settings The surfaces of Somos 9120 and 9420 EP White are highly susceptible to contamination chemicals cured or partly cured resin and dirt Therefore the machine and platforms should be cleaned thoroughly before and after each time they are used Check to see that the Zephyr blade is clean of any residue This can be done by running a gloved finger along ea
13. sin to expand as it warms Replace the cover on leveling plunger area If the resin file does not exist create one for the new resin The resin files are in the c resin directory Load the resin file in the Change Resin Utility and verify that the Ec and Dp are correct In the Recoater Utility start the Adjust Resin Level utility and add resin if necessary Verify the build start position is correct The platform should be 1 2 out of the resin Using the software move the elevator below the recoat bar Exit the menu program At the DOS prompt enter recoater zoff Using the software verify that the sweep works correctly then exit the Recoater Utility Enter menu at the DOS prompt to enter back into the menu program Verify that the heater is on and set to 30 C Before starting a run verify that the lase is on and up to full power iii Unlimited D S M Appendix B Vat Installation Procedure For the SLA 250 30 please follow these instructions for installing a new vat VVVV Y VV VY vyv VY Y vy From the recoater utility of the menu program unload the vat Once the vat unload is complete open the chamber door and slowly pull the vat drawer all the way out till it stops Put the lid on the vat and fasten it on with the four clips Lift the vat out of the drawer and place it on paper towels on the floor This is a 2 person job Remove the old resin from the vat and clean the vat till the resi
14. speed for both hatching and fills Also use tight fill spacing such as 0 002 inch 0 051 mm for the fills Drawing speed for hatching should not exceed the calculated Smaxor the maximum ceiling recommended for the machine Although the hatching speed can be controlled in the build station software hatch ceiling the fill speed must be set by controlling the maximum laser power setting Solution Ensure that there is sufficient time between the scanning of successive layers The time between imaging successive layers is typically sixty seconds or more In cases where the imaging time between layers is too short increasing the Z wait time should improve the concavity 12 Unlimited D S M Solution Check the recoating blade to make sure the bottom surface is clean and check uie uraue yap setting to make sure the blade is level and the rake is properly set Check the resin inside the recoating blade and in the vat to ensure that they contain no foreign bits of material Make sure no contaminants of liquid or solid variety are introduced into the vat If the problem persists contact the DSM Somos help line for other solutions Solution Use sufficient border overcure for the supports and sufficient penetration of the support into the bottom of the part We recommend increasing the overcure for the supports Check that the Top Interface Intersect is appropriate for the part in question 13 Unlimited D S M Appendix A Viscosi
15. t it does not tall into the resin ii Unlimited D S M Appendix A Viscosity Monitoring gt Monitor the temperature of the resin with the thermometer You need to wait until the Zahn cup and resin have reached the vat temperature When the Zahn cup thermometer reads that temperature and is steady you are ready to take a measurement X Slowly lift the Zahn cup completely out of the resin When the top surface of the cup leaves the resin start the stopwatch gt Watch the stream of resin flowing from the hole at the bottom of the cup When the stream just under the cup breaks and changes from continuous to individuals drops stop the stopwatch iii Unlimited D S M Appendix A Viscosity Monitoring Read the number of seconds on the stopwatch and use the table on the following page to determine the approximate viscosity gt Repeat the procedure to obtain at least two values that are close to each other Turn the thermometer off to save the battery Record the following data in a chart for each resin and machine Date Resin Temperature Seconds readings and Viscosity from table If the viscosity of the resin starts to increase inform Somos and provide them with the data from the table Clean the cup and thermometer by wiping with a paper towel Wash the cup and thermometer stem with solvent and dry them Do not remove the long stem thermometer from the Zahn cup until the stem is completely clean Rem
16. ty Monitoring Procedure Maintaining proper resin viscosity in your stereolithography machine is very important The viscosity can increase over time and this can cause problems in building parts If the viscosity increase is severe enough the resin may have to be replaced resulting in significant expense and lost production time If increasing viscosity is identified early the resin can be saved in most cases Early detection of the problem can be accomplished by regularly measuring the resin viscosity This must be done even if the machine is not used often as resin viscosity can change even if the machine is not used The following procedure will explain how to measure and record the resin viscosity Required Equipment X 4ZahnCup ye Thermometer Long Stem that mounts onto the Zahn cup handle X Stopwatch i Unlimited D S M Appendix A Viscosity Monitoring Procedure gt Ensure that the vat temperature is at the part building temperature gt Mount the thermometer on the Zahn cup handle and make sure that the tip of the thermometer is at the center half way up on the bowl The tip of the thermometer will not be in the bowl It will be by the side of it Turn the thermometer on and set it to C Lower the machine platform about 100 mm below resin surface vy Immerse the Zahn cup at a 45 angle slowly into the vat resin so that you do not create bubbles and stand it on the platform Be careful tha
17. wer the vat until its weight is on the wheels Adjust the front and back clearances by moving the vat pads within the slotted mounting holes where they bolt into the vat i Unlimited D S M Appendix B Vat Installation Procedure Adjust side to side clearances by adding shims to the needed side to move the vat pad away from the vat After the clearance adjustments are correct raise the vent to its upper limits verifying that the vat walls do not come into contact with any object in the rim area Remember gt Make sure blado is pulled slightly back so the vat does not hit it and lift the rim When the vat has been fully loaded and the proper amount of resin has been added verify that the resin level in the Zephyr blade is about half way up the viewing window If it is not remove the black cover of the SLA and adjust the vacuum until the resin is the correct height ii Unlimited D S M Appendix B Vat Installation Procedure For the SLA 250 30 please follow these instructions for installing a new vat VY VY V NV NV YVN VY VVV VY Remove cover from leveling plunger area Remove the old resin from the vat and clean the vat until the resin is removed from all surfaces including the leveling plunger and leveling reservoir Clean the blade Clean the elevator arms Clean the resin from all surfaces inside the build chamber Fill the vat to 1 2 inch below the fill ine This will allow plenty of room for the re
Download Pdf Manuals
Related Search