On topic, but how many people actually want to go through the trouble of ordering their motors from China? If we wanted to order motors from China we would do the research ourselves, would we not? All posts so far have been "plugs" with commercial interest. User:by net3d - Administration, Announcements, Policy
ohiomike, I've thought about using polyester polymers with a VF ceramic filler, which would also need a catalyst... How are you mixing the materials together in the extruder? What compounds are you using (any link)?by net3d - General
In my mind, this seems more like an issue which is in the realm of object design and not something which needs to be added to the software. It should be easy enough to do a subtractive combine (cut) between two layers to provide the needed output. Most design software has such capabilities built in. Though I don't know if AoI supports subtractive combines... it should. Adding such a feature duby net3d - General
Why not deposit the wax before adding a layer by electroplating? Adding an additional tool to deposit "seed" material to increase the cathode size might be necessary. A problem which would occur is the cathode would become rounded and probably deposit un-uniformly.by net3d - General
I get it, it's the journey as much as the destination. I say it many times myself that nothing worthwhile is easy, yet I thought it might be worth at least asking to make it easier... No harm is asking? I've already learned quite a lot. And already received clad PCB and electronics for the v1.0 COM board... and some weak motors... ~Sethby net3d - General
Copper resistance. As an experiment I held both coils on with full 3.3 voltage. As expected the motor quickly heated up to 100F or 40 C at which point I disconnected the power. The Ohms went up to 0.7 for this temp, and I assume normal operating temp could be hotter as most steppers and servos can operate at around 70+ C with continuous use. It may have been much hotter internally that what Iby net3d - Mechanics
That's a good idea! And really... I wonder how long they would hold up to 8 amps? I gave it a try this morning with direct 3.3V Excellent holding power!by net3d - Mechanics
Thought I would add, I found a neat little web script that does this all pretty quickly. Almost requires no thought. Just figure out what your resistance needs to be.by net3d - Mechanics
Ok, the motors arrived in the mail today. I had hoped that by some weird fluke they had measured the Ohms wrong, like the surplus store forgot to zero their meter (WRONG)... So, here I am with three perfectly good low wattage motors. They look great by the way. A++ condition! I wanted to hook these up to provide some information about the torque, however I stopped short of holding one of theby net3d - Mechanics
I found what looks like a very good motor at an unbeatable price. Only four wires with 1.8 degree step; but the motor is 2-phase bi-polar. Comparing the model "SHINANO KENSHI #STP-58D4002-02" to what is the closest model number available on the Shinano website the motor _MAY_ have additional specifications of: 7.2 volt 1 amp per phase 7.2 ohms resistance per phase 9.2 kg/cm holding torque I'veby net3d - Mechanics
SOI Sentinel Wrote: ------------------------------------------------------- > Rapid prototyping is also somewhat of a misnomer. > Nothing can beat the speed of a 1000 ton injection > molder for plastic creation. If you have a mold built for that 100 ton injection molder you have gone far beyond building prototypes. ~Sethby net3d - General
I think I have found my answer here: Using a standard CNC board is not possible, the output from reprap software is not compatible. I don't believe making the stepper controlers is possible for $16. Especially when you take into consideration the time needed, tools and everything. This statement isn't logical. For comparison, I have a broken window in my house which I could replace for nextby net3d - General
I didn't say anything about adding parallel to serial support. What I'm saying is there are stepper controllers selling for around $150 to $300 which use parallel cables natively.by net3d - General
It might be interesting to try using a dye-sublimation printer if you have one of those at work. ~Sethby net3d - General
How about adding parallel port support for some of the "hobby" CNC boards? The price comparison to buying all of the components required is less than building all the electronics yourself, not even taking into consideration the time investment of putting everything together. Yes I realize this is a sidestep from the RepRap spirit of self replication, however I might also add the questions of waby net3d - General