Recent content by tiviny

thank you for your suggestions banndit127! I plan to get a container made by a potter, so it is circular. Hanging will hopefully solve the centering issue, it is very hard to centre something that spins. Im doing all sorts to eliminate vibration. Im trying to now make a vacuum degassing...

I asked because you said this I wasnt sure what you were getting at here. As regards attatching, the nylon gear spins too slow and doesn't have enough RPM range. The motor shaft spins at at a good speed with good range, but slowed down to where the good range is it vibrates more than I...

Torque is good. It really only needs to overcome air resistance in the end. How does my motor being bigger affect torque? There is enough space to make the capacitor fit easily. I put 4 of these capacitors on the board, and the last one is supposed to go across the motor terminals. I just use...

as you can see in attatched, red and green are next to each other. i only applied power through these contacts and it still worked well. But ideally I want to only use red and black, correct? there are no semiconductors or ICs anywhere.

It doesn't look like it. There is indeed a third brush opposite red. Hooking up the wires that come straight out of the motor, red and green, works a treat. About that rectifier, the PWM kit came with a 100nF MKT capacitor to be connected across the motor terminals. I forgot this bit and ran it...

ok I took apart the gear section, a photo is attatched. Its pretty simple, 3 contacts touching tracks on the rotating gear, changing how the motor operates as it spins. I am going to muck around with this for a bit.

That sounds good. The epoxy I have is fairly thick. I've decided that's the way to go, plaster as bulk then a thin layer of epoxy as a finish. Ill just have to be careful to avoid bubbles.

ok photo attatched. yellow and brown appear to go into the gear housing.

Its just from a junkyard. I will try to disassemble it now.

I'm not keen on the idea of a base, I think hanging will give the best stability all round. Even once I get the spinning plate level it is near impossible to correctly place the container right in the middle. Even the slightest bit out is not good enough. Hanging the container (accurately!)...

ideally there should be no axial load. I was looking at this thread. I think it needs to be supported from the top. 3am, sleep time.

I am trying to make a mold of a deep parabola, by putting plaster of paris in a spinning flower pot. I've got another thread going as well. So far I've tried using and making all sorts of spinning bases, however inconsistencies in the rotation of the pot have to be almost invisible for the...

bit late, but perhaps a plot device could be a spear-gun like device that shoots an electrode attatched to an insulated cable? That way you might be able to get some range and accuracy, although I don't know how viable something like this would be. Reading this thread tells me I should take...

Bubbles are a big problem, they accumulate right at the very bottom, where it has to be the most precise. I am sure there's something better than paris plaster. I built a potters wheel with a pulley attatched to a high rpm sewing machine motor. There were all sorts of problems with levelling...

Aim is to cast plaster of paris as bulk filler. if it doesn't set evenly then maybe a thin layer of epoxy resin on top. I can only assume this will be good enough. I considered a drill but I will be using this more than once, and also plan to make a 2m wide rotating version where a decent motor...