Search found 1860 matches

by tornitore45
Tue Jan 19, 2021 8:14 am
Forum: General Discussion
Topic: Why do I need a Variac?
Replies: 7
Views: 119

Re: Why do I need a Variac?

I have two a 100VA and a 500VA I have needed to used them about 4 times in the last 15 years and do not recall the specific. If you want one get one, on the other hand you may spend the next decades without needing one. Sometime a simple dimmer can do the job, like when converting an espresso maker ...
by tornitore45
Sun Jan 17, 2021 4:24 pm
Forum: Riding Scale Railroading
Topic: Controlling separate DC traction motors
Replies: 5
Views: 165

Re: Controlling separate DC traction motors

Just a stab. The current controls the torque. So you control one motor and sense the current. Then make a feedback loop that "tweaks" the second controller (the pot or the reference) to "mirror" the current. The loop sense the error between the 2 current sensor outputs and react to adjust one motor ...
by tornitore45
Wed Jan 13, 2021 6:18 am
Forum: General Discussion
Topic: Does 404 SS anneal and become malleable?
Replies: 12
Views: 422

Re: Does 404 SS anneal and become malleable?

For now, I am looking ahead since I have not come to that part of the construction yet. It may be some time until I will tackle and document the process. Perhaps the choice of stainless was wrong, brass would have been a better choice since this part has no demanding functional requirement other tha...
by tornitore45
Tue Jan 12, 2021 9:49 am
Forum: General Discussion
Topic: Does 404 SS anneal and become malleable?
Replies: 12
Views: 422

Re: Does 404 SS anneal and become malleable?

followed by rapid air cooling. Can you expand on that? Steel is normally annealed by slow cooling. Brass can be allowed to cool slowly, speeding up cooling is only for convenience. All the welding capability I have is silver brazing and flux core which it usually turns out looking like solidified v...
by tornitore45
Mon Jan 11, 2021 6:43 am
Forum: General Discussion
Topic: Does 404 SS anneal and become malleable?
Replies: 12
Views: 422

Does 404 SS anneal and become malleable?

I need to make a tapered chimney and plan to start with a seamless tube, cut out a triangular slit and coerce the rest into a tapered "round" tube.
I need not to spring back too much.
4" Long Small OD=0.825" Big OD=1.062 Wall=0.04
by tornitore45
Wed Jan 06, 2021 10:09 pm
Forum: General Discussion
Topic: Creating spinning top out of Aluminum
Replies: 14
Views: 1768

Re: Creating spinning top out of Aluminum

Rereading your post and visualizing the set up. The tops I spun as a child were running all over the floor. An 11 lbs disk spinning 15KRPM under vacuum is not something you want to have running around so I assume you have some requirement to keep the thing in one location. That may be a factor in ch...
by tornitore45
Wed Jan 06, 2021 10:03 pm
Forum: General Discussion
Topic: Creating spinning top out of Aluminum
Replies: 14
Views: 1768

Re: Creating spinning top out of Aluminum

Theoretically means nothing. The intersection of plane and sphere has zero area just like a cone intersecting a plane. so theoretically the pressure is infinite and the object deform until a certain contact area is reached to lower the load below the breaking stress. Now try to visualize the indenta...
by tornitore45
Mon Jan 04, 2021 11:33 am
Forum: General Discussion
Topic: Compressor timer switch question
Replies: 35
Views: 1125

Re: Compressor timer switch question

Separate the control "smart" of the circuit from the "muscle" the power handling of the circuit.
Select the best delay relay for the job, then drive a contactor to control the motor.
by tornitore45
Fri Jan 01, 2021 10:04 am
Forum: General Discussion
Topic: Conic Clutch design
Replies: 6
Views: 452

Re: Conic Clutch design

Thanks all, you gave some points I did not consider. Galling and the fact that a steeper angle gradually converts the clutch from a conical type to a disk type changing the the distribution of radial and axial forces.
by tornitore45
Thu Dec 31, 2020 5:01 pm
Forum: General Discussion
Topic: Conic Clutch design
Replies: 6
Views: 452

Conic Clutch design

I am building a model tractor. The plan call for a clutch Brass to Steel 1" diameter 5/32" thickness (width) The plan specify a single side angle of 20 degrees (40 Included) I think the angle is too steep, thinking it should be a releasing type coupling but just barely, I am inclined to make it 10 d...
by tornitore45
Wed Dec 30, 2020 12:03 pm
Forum: General Discussion
Topic: Can I get tips on hogging metal?
Replies: 7
Views: 474

Re: Can I get tips on hogging metal?

First saw before you mill Second consider drilling as the faster cheaper metal removal method Third use a roughing end mill Carbide is about mandatory for steel on the X3 mill Fourth do not even think of climb milling when roughing I have the same mill and it does not like much side cutting, is a li...
by tornitore45
Tue Dec 22, 2020 8:21 pm
Forum: General Discussion
Topic: Adjustable Angle Plate
Replies: 11
Views: 925

Re: Adjustable Angle Plate

Two tilt table multiply the set up complexity. Same angle, same X same Y both parallel to the T slots.