NeilRG

Remember its wingardium levioSA, emPHASIS on the second syLLABle. Per Hermione Granger and Mike Myers. OK I'll stop now . Thanks for the post.

A project that is fun to build AND connects with a young child is a wonderful idea. Very nice post.

This is a great answer. I appreciate the evolutionary path and goals you have set for yourself.

I drew inspiration from this. I have a 10 HP three phase converter that runs my 3 major machine tools. I will modify the design you presented to sequence a start relay which is needed to engage the starting capacitors in the phase converter which then should be bypassed once the phase converter is up to speed and before the major machinery is turned on.The solid state relay idea is fine but you could have remedied the spike with a back emf suppression diode across the relay, an optoisolator to drive the coil and if need be a snubbing cap across the contacts. I know this sounds much more complex than the solution you went with and I am not criticizing you, but solid state relays are expensive in the ratings I require , plus I already have the contactor.

This is the OTHER meaning of CAD. Cardboard Aided Design! The question I have is since you have a 3d Printer, Why not just print the parts?The one bad idea you mentioned is using a potentiometer to control motor speed, unless of course you were going to use a PWM scheme to control your motor. A simple pot circuit would waste power as heat.Good post. Thank you.

I agree, this is wonderful! I've followed your other projects and appreciate the ingenuity you possess .

As Ed Norton said to "Chef of the Future" Ralph Cramden, "Can it core a apple?"Nice build.

You would get better soldering results and expose your capacitors to less heat if you cleaned the oxide off your parts before you solder them.

This is noteworthy in my view because of the craftsmanship you demonstrated in this instructable and the justifiable pride you have in the end result. No hot glue duct tape or tie wraps that seem so prevalent in some areas.

What?!? No air motor?Wonderful job, again.

I admire your positive attitude, intellect, and dry sense of humor.

This shows the OTHER meaning of "CAD".Cardboard Aided DesignNice project.

This is pretty clever. McGyver would be proud. Using heavier wire and filing a point to size required would give more thermal mass and made the soldering process easier.

Please make clear distinction between "welding" which involves melting the underlying metals being joined at thousands of degrees and soldering which a low temperature process at about 650 deg fahrenheit does not melt the metals being joined only the solder. There is no welding in this project.

i have two of these. Nice post

i am a long time fan of K& J magnetics and a customer. The magnet stuck to the negative end of the battery is obviously going to stick quite well, but the positive end could possibly come out of position and increase friction due to the much smaller size of the positive terminal.Why not put a small steel washer big enough to fit over the positive end that is smaller than the battery's outer diameter and stick the magnet to that, to provide a more stable base and more mass for the magnet to stick to?I hasten to add that i have not built this as yet, so this is just appoint of of conjecture on my part.

Nice rainy day project for kids. A section of a wide rubber band glued to the rear wheels might aid traction.

Papier mache! Wow! This is an artistic "labour" of love for sure! Beautiful results.

I appreciate this project because of the presentation, which details not only what worked, but possible problems, actual problems and solutions as well as ways to refine and improve your design. This mindset will serve you well as you progress in your career.

I guess the responsibility for emissions control rested with Wilma! It was based on Freds diet. I wonder if he was lactose intolerant?

just what we dont need is some noob trying to scale this up and trying it with a lipo battery or other larger battery to their ultimate detriment. Instructables should pull this post. I have commented many times and have always respected the be nice policy but this non invention is moronic.

Yes i know i was just speaking to a method to isolate a variac. My post was a bit tangential.

Any project that benefits a pet is really nice to see, especially dogs!!

The supplied schematic is excellent as is the source listing for the parts. This is a very complete instructable. My interest in inductive heating stems from a desire to solve a technical problem where in a 1/2 inch stainless steel rod is "locked" in place by galvanic corrosion to an aluminum tube. The area has limited access so I will need to fabricate a flexible link to the coil to get the coil around the desired assembly. I do not imagine I will need anywhere near the power this unit is capable of for this application, since I am essentially trying to exploit the different rates of expansion between the Stainless rod and the aluminum tube, not melt anything!!The greater capabilities will be of use in my machine shop at home.Thank you,Neil

The design of the chuck you fabricated is simultaneously simple and very clever. I will be incorporating this into a coil winding machine that will be stepper motor driven with a separate stepper for the lead screw.Thank you for your post.

This instructable was a surprising source of nostalgic thoughts resurfacing. Many years ago when I was very young I had an extended hospital stay. I had been given a kaliedoscope that was a plaything that i really liked. This instructable is EXCELLENT not just for the quality of the presentation, but for the valuable links included.Thank you,Neil

Yeah I know how it goes. 2 decades ago i gave the son of my friend a breath powered siren. It did wonders for our friendship.

So a question that popped to mind:What percentage of your desire to build this is to amuse future grandkids?And what percentage of you desire to build this is to annoy the heck out of your son?I'm just sayin' :)Nicely rendered project!

This is a wonderful project as far as the wearable display is concerned. For remote multimeter i have several mooshimeters, which have the ability to link to an android or IOS device. The newest software allows the meter to talk to you.I mention this as an off the shelf albeit pricier way to remotely measure dangerous voltages from a safe a vantage point, and not in any way to diminish what you have achieved.First rate project! Thank you.

You have probably spent too much time watching Chuckie movies and the like . I did not find this creepy at all. On the contrary, I thought this project was "cute".The information contained here is useful, and i think this is a very cool project.BTW if you want creepy, animate the head and limbs. No one who remembers Mr. Ruxpin will expect that.

This project respects the solemnity of the event being comemorated and shows a good use of our G-d given mental assets . Nice project and video.

Anyone following this instructable should note that welding plated metal has the potential to release toxic fumes. The project could be improved by using some neoprene foam ie: an old mouse pad to line the inside reducing the likelyhood of damaging the table legs. If you choose to add the padding plan ahead and allow for the added thickness.

This is a fascinating project. I'm wondering if the voice coils from disk drives could work as the x y positioning elements. I have not studied them in enough detail to know if they have the needed resolution. What do you think.

Very impressive detail in the DeLorean!!

I would be astonished if this post gets anyone else who claims I made it. Awe inspiring.

This is truly an incredible project. I will start printing when i get home from work today. The availability of the electronics and modular open source nature of this are extremely appealing.

Beautiful work!! Excellent instructable. I especially appreciate your Hot Tips on welding properly. In step 10 you reference the importance of grounding so as not to ruin the bearings. As an electronic and mechanical engineer I appreciate the effort & thought that went into this project. Its not something I directly have a need for so I am writing mainly to offer encouragement.Best,Neil

A wonderful project! I do not think that the person who created this can be held responsible for knowing material costs outside of his familiar area. I wish the nit pickers would stop it!! There are some useful things to be learned here. Thank you.NeilRG

This made me smile. Elsewhere on instructables there are servo controlled air valves that could be used to control air flow out of the balloon. Obviously not having made one I've no idea how this wonderful little car with the added weight. But this is the synergy that comes to followers of this site.Cheers,Neil

Interesting chip. I'll bet no one says they "made one"..... ever!!!!How is this an instructable???

the ingredients are not toxic but neodymium magnets are NOT for young children. They are brittle and if they are allowed to fly together they can chip and spark and the chips are sharp. There have been some serious problems with kids swallowing small neodymium magnets which attract to each other through intestinal walls requiring surgical intervention.Given the relatively fluidity of this compound you could work with ceramic magnets. They are less powerful in a given size, cheaper and relatively safer than neodymium

I might have had better results running it on a 9 volt battery and putting into a metal enclosure with the antenna sticking out but the circuit exhibited poor noise immunity when assembled on to a solderless breadboard I actually got a better result by eliminating the first stage and connecting the antenna to the second stage. I must add that I was working with this unit in front of my laptop and around some test gear on my bench so the circuit may just have picked up on ambient noise since it is not filtered.Thank you for the post.

This is exactly what I was looking for. I will probably increase the gain/sensitivity because i have a narrowly focused need for this type of circuit. Specifically I need to detect when a haptic feedback motor runs in a piece of gear that i cannot wire to directly. Are the inductors you selected air core or ferrite core?Thank you,NeilRG

One method to isolate a non isolated variac which I used years ago to make a servicing rig for my bench was to take two identical beefy STEP DOWN transformers i had laying around and wiring them back to back low voltage to low voltage sides. The emphasis on step down is to keep some noob from connecting two microwave transformers these as many know are step up transformers and VERY dangerous. Interesting post. Thank you.

Another thought is the idea of reducing radiation by twisting the wiring going to the steppers using a variable speed drill. This will help with inductive radiation. These ideas have helped on 3d printers I have built. With a machine as large as the one you built, the runs are much longer so the capacitive and inductive coupling has more "plate" area or more turns through which to couple inductive noise.Best,Neil

I believe you misunderstood my last question. I not concerned how much current the spinner motor draws. Im trying to figure out if the upper bearing could be replaced by a motor which is being spun by the rotation of the ring and used as a generator to supply power to the rotating electronics in the ring .The shaft of the generator is fixed to the frame. The body of the generator is attached to the rotating ring so that as the ring is spun up, the generator could supply power instead of putting voltage through the bearings.I look forward to hearing from you.

I saw this, collected it and downloaded it , i havent actually studied it yet !! I havent searched instructables specifically for propeller projects but you have inspired me to do so. Keep up the great work. I have a idea . If the upper bearing were replaced by a brushed dc motor mounted inside the rotating ring and the shaft were fixed to the frame the motor would become a generator driven by the spin motor and thus supply a dc voltage to the display and micro controllers. Because the mass is centrallized balance would not be affected, however driving a load with the generator would increase the mechanical load for the spin motor. Could you provide current measurements for just the rotating part of the display? I havent done the math but i think the idea may have merit.

Gallagher is getting on in years. All hail the New Gallagher!!

and may i add a hearty Yabba Dabba Dooooooooo!

Larry03052 you are not political you are citing unverifiable facts, or alternative facts that have no basis in reality.

Thankyou for condensing this process down so effectively. I find that when i explain something that i benefit as well because we achieve a clarity of thought.

The tracking adjustment is a nice and essential feature. Nice project.

I appreciate this is a Propeller based project. Yo habla Spin. The clever way you got around needing a slipring is inspired. Beautiful project. Thank you,Neil

Very thorogh instructable excellent presentation especially in the presentation of the tradeoffs that one has to make in any technical project of this scope.The links will be helpful. Iam envious of the aluminum shown at the dealers yard. New is an option but that place seemed to have an amazing assortment of odds & ends.The one likely problem with the limit switches is electrical noise pickup especially if the limit / home switch runs are bundled with the motor cables. I would recommend running the limit switch wiring in shielded cable with two internal conductors. Tie shield to ground at the control box and let the shield float at the switch end.I hope this helps. Thank you,Neil

Black anti static foam sandwiched etween two metal plates works very well.

Nice quick proof of concept. Small servos are not meant for such a large cantilevered load. The life expectancy of this design could be improved by having the axes supported by a shaft running through a hole in your printed plastic parts and the servos only being used to impart rotary motion either with printed gears or via servo horn to a wheel on the drive shaft (s) via pushrod. This will reduce the off centered load on the servo output shafts which should improve the smoothness of the pan tilt motions.

The artistry comes through in everything about this project. Fuctional art like this is inspirational. What do you think of getting a pin up girl painted onto the shell in the style of ww2 nose art that appeared on planes?

this is a clever piece of up cycling. Since i always use filament from the same manufacturer, i just rely on weing my spool before a long print.

this really useful. An actual piece of test equipment that does not have a uproc in it. Still an arduino could provide scale conversion and data logging among other features.Great instructable! Thank you.