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Messages - webby2
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287
« on: July 24, 2019, 02:10:54 pm »
I have been taking too much time for this and not enough on the things I need to get done,, Small scale testing has shown that I can setup the reaction disc as such that it will load the drive disc without itself taking on a rotational value, it does not show any torque of its own. Small scale testing has also shown that I need to make it bigger so that I can produce at least enough torque to overcome frictional losses and such and demonstrate the principle. I have had a few surprises and some funny situations while testing,, stick and slip was one that had me watching in amazement,, I actually chuckled at it  So what this means, by the way, is that it can create a constant difference in velocity or it can create a non acceleration of the reaction disc.
288
« on: July 20, 2019, 10:22:47 am »
So I do not have a self accelerating flywheel.
What I do seem to have is a constant velocity interaction.
I will label the two main parts as a drive disc and a reaction disc. The reaction disc is free to spin while the drive disc is NOT engaged and when the drive disc IS engaged there is a constant velocity between the two discs.
The testbed at present has the drive disc held by an external component and so is not free to spin and it is on bearings to its shaft that is the same shaft that the reaction disc is on and the reaction disc is also on bearings.
The external constraint for the drive disc when the system is engaged is holding against a constant force from the drive disc, it is pulling on the constraint. When I accelerate the reaction disc the drive disc will slow it down and when I slow down the reaction disc the drive disc will accelerate it, these actions will bring the velocity between the two discs back to there constant state and the external constraint reacts appropriately to those changing conditions.
From this I am assuming that if I were to bring the whole system up in RPM that the relative velocity between the two discs will remain at its constant rate and that the drive disc will still be applying its constant force against whatever it is connected to, aka a motor shaft that is spinning the whole system up to some RPM and as such it would be supplying that shaft with a torque which should then reduce the input from the motor.
The system as it is consumes a lot of energy in the form of work done to both create and maintain the velocity between the two discs, right now most of that energy is dissipated as heat. In other words I am dumping electrical energy into my system (approx. 9W) and in the process of converting that energy into heat the system is creating a constant force, not that this is a heat engine, so far this appears to be a one way trip for the input electrical energy.
As time permits I will build the setup needed to mount all this on a motor and test for a drop in input while the system is engaged and see if that drop maintains itself over time. This will be to make sure that it is not a storage and usage of momentum and is a constant.
289
« on: July 18, 2019, 03:26:15 pm »
I won't say that it is a success but it seems as though I now have a self accelerating flywheel. ( sort of,, I am powering an electric motor that provides the oomph for acceleration) I continued on with using some old testbed parts to throw something together in a very rough form,, using tape and stuff to sort of hold things together and then I am using an electric motor in all this and I held the contacts to the motor by hand,, not good but I don't think the wires contributed anything. Lots of other stuff going on for me so I will take the time as I have it to actually design and print some proper parts with actual brushes If when that is done the flywheel still accelerates then I think I just might have something of interest.
290
« on: July 17, 2019, 10:47:13 pm »
many testbeds later,, chasing an idea, not the concept but rather the how can "I do it"
I love it when I find an old testbed part lying around and use it to see if one approach could work and it does seem to work.
The tricky thing with forces is there is always at least 2 and the sum of all forces is zero,,kind of has to be when viewed from a relative view point within a closed system.
Think about it this way,, your arm pushes against a wall, your back and FEET push against the ground and the wall pushes against your arm and your arm is stuck in the middle.
291
« on: June 29, 2019, 12:53:27 pm »
An interesting printer issue.
My sheath that connects the extruder to the hot end came loose, that is the fitting that holds the end of the sheath to the extruder wore out.
Did not think that would happen but it would explain some print errors I have had,,,,
292
« on: June 23, 2019, 07:56:43 am »
It has taken a long time to print and clean up a bunch of parts for another testbed. Well I had most of them printed but I needed to assemble several of the subsystems so I could get an actual measurement so I could make another part, well that is what I told myself. After I did the crude assembling thing I just could not resist putting in a drive motor and a load motor,, just to see. The load motor is a modified motor and in its modified state and with no load on it it worked fine, well good enough for what I needed it to do, but when installed the unit failed miserably, so that needs to be redone or swapped out with something else. While all this was going on I smoked one of my drive motors,, the smoke was actually coming out of the motor. On top of those failures I also broke several of my subsystems,,, no biggie I just need to re-print them and stuff. With all of that what I did manage to see the system do was not as large as I was hoping for, it did appear to show what I want but not to the force level I thought I would get, but then the motors I am using do not make much force,, they can get really hot however
293
« on: June 23, 2019, 07:38:47 am »
I am using a press fit drive piece to connect a motor to one of my testbeds, it is a 2.3mm diameter shaft motor so it is very small.
When the drive motor is loaded and starts to heat up the output shaft starts to "slip" inside the connection piece and has a few times now actually allowed the connection piece to get hot enough to warp and bend. On larger diameter shafts I have not had this issue so much, or if I key the connection. I have also tried super-glue with some success but as I am using it right now it is not a good way to go.
294
« on: June 03, 2019, 04:55:26 am »
An interesting thing to remember.
PLA will wear out metal parts.
I have printed a lot of parts on my printer, changed the print head\extruder out to a Bowden style system,, but other than that change I have been running with the same parts, so that is only 1 new hot-end and 1 new nozzle. I modified my extruder to accept the Bowden setup so I have been using the same hob all along.
So the other day I used the NEW Basic Premium filament from Amazon and my printer would not work with it, I had an older partial spool and put it back on and it worked fine, back to tha Amazon premium and no good,,
I started replacing some of the parts I was planning on but in a less planned out method than what I wanted, I was looking for the reason my printer did not like the new filament. I now have a new hot-end and cooling fan for the hot-end, not to be confused with the parts cooling fan, a new sheath that goes between the extruder and the hot-end, a new nozzle, a new heat element and a new thermistor,, all this and still no joy.
Now you can see why I mentioned the hob,, yep that was the problem mostly. The new filament is about 0.178 to 0.174 and the older stuff was 0.175 to 0.173,, the slightly larger diameter filament makes for a slightly higher friction in the sheath, and a slightly higher pressure making it slightly harder to push the filament through the nozzle and my hob was worn really bad,, smooth in a few spots even.
295
« on: May 22, 2019, 08:05:22 am »
What I might also say is that sometimes it is the path you take and not the destination that counts,, you just might end up where you started from but done so much in getting there
296
« on: May 15, 2019, 07:42:28 am »
Sometimes you cant control the action, but you just might be able to control the effect
297
« on: April 28, 2019, 12:44:09 pm »
I think a while ago on a site about Bessler I read,,
Force makes force.
Motion makes motion.
I have a slightly changed appreciation for that now.
298
« on: April 25, 2019, 11:15:04 am »
Got a lot of things happening in life, so I have not spent much time and effort with this,,
I did get this, which was actually an accident. The program I am using for the simulation *I think* does not deal correctly with collisions the way I have them, so I have stopped that collision and in the process of doing that the sim showed a loss, made a few changes and ended up with this.
Edit: nevermind I did not notice that by stopping the one collision I was focusing on another set of parts were colliding instead.
299
« on: April 12, 2019, 11:18:19 am »
This is the first go round to have the sim work the other way, this is most likely the method I will build to.
It is not real "clean" yet but I think I can get it there.
300
« on: April 11, 2019, 10:40:58 am »
This is a single unit running and setup to be a scaled up version of one of the two ways I am thinking of running it.
Meaning I can build it this way, or if it becomes easier for me I can build it another way that is harder to sim.
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