My last post was concerned SLA type 3D printing. There is a variation to the SLA laser beam where a full frame binary B&W image is projected at full frame for each layer of the print. Two variations of this process exist. One uses a video projector and the other puts the video LCD screen up against the resin tank with a bright UV light source behind the screen.
The process is called DLP (Digital Light Processing) and creates higher resolution 3D prints than SLA and can be done in some systems at much lower equipment cost.
This has changed my mind about the affordability of high resolution 3D printing in my world of dimensional art. I made a business decision.
I have a DLP 3D printer ordered. This new printer costs about the same as two of my FMD (plastic filament printers) That does fit within my budget.
The DLP printer can produce ready-for-investment masters for lost wax casting. That is my purpose for this printer. The full frame image permits printing multiple items at the same time and no increase in printing time. One ring or 20 copies all print in exactly the same time.
I chose a low cost simple machine. Not purposed for a high production rate but absolutely suitable for the scope and amount of work I produce. It will be a great learning tool. I will also be experienced to advise others or make upgrades in this first system.
Most of my reporting on this new tool will occur in my 3D printing website: http://rd3dpds.com. Eventually I’ll post more here, when I start producing dimensional cast items.
I have investigated this process for use in jewelry making and any other high surface finish 3D printing. The hardware cost has been coming down, but the cost of materials and the finish work such as UV hardening, and support removal are still cost and labor intensive. With enough production need the cost can be reasonable, but it is a system that should be utilized to its fullest extent.
That means it needs full time operation and not occasional utilization.
The process uses a focused laser beam (a) to “paint” the structure layer by layer, on a surface (c) immersed in a polymer solution (b). The light beam partially solidifies the polymer at the focus/surface point. The build platform (e) moves the item (d) away and usually out of the liquid polymer material as layers are added.
The results are usually the ability to produce a very fine, smooth, and accurate surface finish. Post curing and extensive support removal and detailing by hand are required.
Some of the polymer material is suitable for direct used for investing and casting. Other polymer material can be used in the vulcanized or cold process rubber mold making. Then wax burn-out masters can be produced. Many options are available for producing and using the final print output.
The process although high quality is still expensive and labor intensive. There must be a real purpose and plan to make full use of the technology. If everything I made originated in a CAD drawing, The process would be more attractive for the things I create. I would love a “free ride” to play with the process but to purchase such a system, it would have to pay its own way in increased sales.
I currently don’t produce enough jewelry items for SLA to replace my CNC machining. That’s bottom line reality.
I realize I haven’t posted here for a while. Mostly because I have a lot of other artsy/crafty blogs where I spend time. I like to think of those other areas as all one big happy family and this is a sibling of the others. Just different URL’s.
If I put or consolidate everything here for example, there would be just as much “stuff” and harder to stay on topic.
So anyway, I’m Back! The topic is Vectric CNC Software.
Most everything I create needs a 3D CAD drawing. That’s because I make a lot of things using 3D CNC subtractive machining and more recently 3D additive printing. That does not imply that I don’t do a lot of old fashion hand work or assembly of parts.
I have several powerful software options from which to choose. I write about the others as I continue to use them. My all-around favorite for 3D CAD and CAM is Vectric Aspire. I have every version of Aspire since it was first created. The newest version just released is Version 9.0. (Actually 9.008)
Originally Aspire was the combination of several other programs from Vectric and its strong heritage seemed to be toward the CNC overhead router, sign carving venue. That is a strong niche, but far from the only use and purpose for Aspire.
I use Aspire to design and carve wax masters for lost wax casting of jewelry items. An application almost never mentioned in their forums. It works very well for that purpose. I also use it for a lot of wood carving projects as well. Recently I have designed items for 3D printing as Aspire outputs very clean Stereolithography files (.STL). Again. A use not much mentioned in their forums.
I just pulled the trigger on the update from version 8.5 to 9 as there are some significant updates. They at last moved automated double-sided carving from their lower cost program Cut3D in to Aspire. Not 4 axis 3D, but “flip-over” 2-sided 3D. I am thinking a great feature for some pendant carving.
Purchasing the program outright, no upgrade, is a bit pricey at the $2K region. My upgrade was $400. However, I am making money from what I can design. So, the cost is easily justified. Some people may not want that level of expense in a hobby, but even hobby use can create a payback over time. It all about how much you use it.
There are individual programs at much lower cost. The Vectric moto is “Passionate About CNC” If that describes you, then you should be looking a Vectric CNC Software. Highly recommended by Dimensional Art Org.
I blew off the silver making for a while because of the 3D printing mania I just experienced. Yes, the 3D stuff can be very habitual, but in the end, it is just an unusual piece pf plastic. Not a durable piece of jewelry art cast in precious silver. Well, semi-precious silver.
I’ll remain somewhat engrossed with the printing as there are things worth making. I can always design special plastic things I need exactly to my specification rather than try to find readymade.
I just invested in a stock of new casting grain silver and a fresh box of investment plaster. I have some designs I know will sell. I like to make new designs more than remake what I have already done, but I don’t forget what my customers like.
I cast two new pieces just yesterday. I just love working with silver.
Silver doesn’t get wasted like plastic. Silver can be melted and used for something new. What is lost is the large effort required in making any LWC finished object. The cost of the silver is a small portion of the overall cost of material and effort.
I looked again at pen turning. I have made a few in the past. I could easily make wood (or other material) turned pens again. The barrels are the only part that are handmade. All the other parts are purchased. Some folks make these items as a full-time retirement occupation. The prices and profits are quite high for the effort involved.
I may make a few more examples since I have the tools and the material is easily obtainable. There is a huge business in selling the supplies. The pens (and other lathe turned items) are beautiful and unusual, but not the same creative art that stems from wax carving and producing art from totally raw materials.
I am not demeaning pen turners, they love what they do. I like to make them. The makers do add value turning and finishing the barrel, but most of the product is factory made parts that are assembled. It is what it is, a kit of parts. Value is in the mind of the buyer, looking at the finished results. ‘Nuff said.
Exploring new “making” opportunities is a great experience. Without the experience, I feel I have no right to comment or criticize ANY subject. Here’s a rule I try my best to follow; "Experience is the best teacher. Knowledge without experience is simply knowledge looking for application." It’s what “doing and making” are all about.
|What hand carving looks like.||Three in their cans, one more to go.|
A small inventory of handmade wax carvings is accumulating in the studio ready for lost wax casting. The 100 degree Texas weather and non-air-conditioned studio are not conducive to firing a kiln up to 1200 degrees for 10 hours. One casting session was done a few weeks ago when the weather dropped into the 80’s for a few days.
Crying about the Texas heat seems to be a favorite excuse. That’s actually not a serious problem as I am not operating like a “got to get it done” business. However, it’s nice to mix the silver casting along with doing the wax design.
There is a hankering at the moment to do this one-of-a-kind hand carving of the wax. That could be because the hand carving is performed in an air conditioned office area. But it is also more than the comfort. It is a lot of fun to make something entirely by hand.
Designing with computer drafting (CAD) is also a favorite process in the comfort in the office. But the several CNC machines that do that intricate machine carving are out in the unconditioned shop. Ugh!
Creating by hand the very fine detail that my computer numerically controlled (CNC) machines can produce is not possible for me. That’s why I like using the CAD software drawing approach. With a good drawing, a CNC machine can usually make it. There is a lot of artistic effort and sense of accomplishment in creating the drawings. The machining process needs to be fully understood and exploited. The results are very rewarding.
The hand work is a totally different approach. A sketch is created but never a CAD drawing. It’s just not needed. A picture or a model of what is intend is also useful.
Sometimes just sitting down and cutting wax usually works but is not a great idea. A general plan is a definite advantage. A good idea with a sketch or picture solidifies where to go, is the best first step.
Working drawings are almost never presentation quality. Not trying to sell the piece before it is made. A presentation is usually SOP (standard operating procedure) for professional high value commissioned work. Someday it may be needed but no demand for commissioned, high priced work exists at the moment. Ha!
Actually, requests to duplicate previous pieces do come in. So far they have been fun re-work and the results ok for both me and the customer. Recently, orders for a whole series of flying horse pendants and pins from one example made on spec for my daughter, came in. Custom ring designs are occasionally requested.
A rubber mold duplication system is available to do wax injection molding with popular repeat designs. It is perfect for use duplicating hand carved originals. A CNC part can be duplicated by running the program again or using the mold process. It’s nice to have options.
Hand work presents or reveals the real artist in me. Every mark or flaw on the wax is there because I put it there. There is considerable enjoyment, to create directly through manual hands-on effort. It is different (and a lot slower) than sitting back and watching the machine do all the perfect cutting.
Having and using both methods is an enjoyable advantage. Some items need, even demand, the cool precision detail of machine carving. Others designs deserve the warmth of fine handmade work.
I am getting better with hand carving. Seeing the outstanding hand work done by others induces a desire to stay involved in quality handmade work. No allowance for my peripheral neuropathy limitations is ever an excuse for poor work. Hand work is just a bit slower, with care how to hold things. Right now it does not prevent carving anything imagined. It’s good for my spirit to work directly with my hands. It’s a type of personal satisfaction felt in creation of the work. Best therapy available.
Machine and hand carving are both rewardable. One method is no “better” than the other. There is no contest between them. So, no winners or losers. Just skills to develop and results to be enjoyed