design trolley on tracks

[leonardo000333]

Finally now we see that it is a 3x6meter platform....and it translates on the short side. This means that both you put the wheels, but even worse if you rollers, you will move diagonally. above all you can not put a tow pin but they want it due with a beautiful Parallelism bar which does not find (especially).

I didn't understand why he moved diagonally... and in what sense two pinions with parallelism bar? never heard

 

[leonardo000333]

a pinion with 13 teeth need to have rectification of the spinal profile to function properly and you have a reach to the foot of the sufficient tooth. the undercut weakens the foot of the tooth.
look at a pinion with z=12 without and with positive profile shift.

from what I understand the modification to the tooth profile indicated by you increases the contact surface right?

 

[leonardo000333]

otherwise you are making the mistake that make all those who use the inverter as a potentiometer.... vary only the frequency and so they cut the torque and the motor does not drive... .

but if I lower the number of laps does not increase the couple? however thanks to the dedicated time

 

[meccanicamg]

I didn't understand why he moved diagonally... and in what sense two pinions with parallelism bar? never heard

all that must be moved "right" that is on "lasche" guides and moved by one or more unsynchronized actuators (eg this black hydraulics) need two racks with pinions exactly in phase connected by round bar that rotates with the mobile wagon.

 

[meccanicamg]

but if I lower the number of laps does not increase the couple? however thanks to the dedicated time

if the engine is always that does not increase the pair by decreasing the turns. to increase it you have to use the encoder and with a closed ring you can also have double torque at zero turns per minute.
If you don't do that...... low turns...low couple.

 

[meccanicamg]

from what I understand the modification to the tooth profile indicated by you increases the contact surface right?

the modification of the tooth profile as I wrote before does what I wrote before.... does not increase the contact surface..... becomes bigger the base not to break. I thought I wrote clearly. ...but I must say that you did not understand, even with drawing in scale what it means to do x=+0,5.
It's hard to get to the point if you don't catch the imbeccata... .

 

[leonardo000333]

Okay, since I'm ignorant about it... Does an encoder measure the rotations of the right motor? how can this increase the torque if interfaced with inverter and motor?

 

[meccanicamg]

Okay, since I'm ignorant about it... Does an encoder measure the rotations of the right motor? how can this increase the torque if interfaced with inverter and motor?

here there is a nice guide to the adjustment of the engines.

 

[leonardo000333]

Thank you very much, tomorrow I study the one and the one on the friction, I repeat the calculations hoping that with friction to 0.25 and higher yield of the reducer I arrive to 5.5kw.
mechanicmag according to you how much can cost me encoder motor and inverter installed and developed by a person who knows how to do it and not by a garage electrician? I think: 600e motor, 500e inverter, encoder200e, 500e work

 

[meccanicamg]

Thank you very much, tomorrow I study the one and the one on the friction, I repeat the calculations hoping that with friction to 0.25 and higher yield of the reducer I arrive to 5.5kw.
mechanicmag according to you how much can cost me encoder motor and inverter installed and developed by a person who knows how to do it and not by a garage electrician? I think: 600e motor, 500e inverter, encoder200e, 500e work

more or less we are on these figures.. Maybe something more.

 

[Fulvio Romano]

because by hand I can turn a handle at maximum 80 g/min while a motor makes many more so the translation of the handcar has a very low speed

I would like to say that it is a matter for the Commission to be able to avoid the machinery directive.
You don't know what you're doing and what kind of trouble you're in.

 

[leonardo000333]

all that must be moved "right" that is on "lasche" guides and moved by one or more unsynchronized actuators (eg this black hydraulics) need two racks with pinions exactly in phase connected by round bar that rotates with the mobile wagon.

I'm not getting on this one. do you mean 2 parallel racks and a reducer with 2 exits where 2 pinions will go?

 

[leonardo000333]

here there is a nice guide to the adjustment of the engines.

I read it all, of course he did it a subscribe and it is a bit of part, that is practically the dtc system would seem the best, where it does not even need the encoder from what I understand and say that the costs are less than making a closed ring control system.

 

[meccanicamg]

I'm not getting on this one. do you mean 2 parallel racks and a reducer with 2 exits where 2 pinions will go?

That's how I burn.

 

[meccanicamg]

I read it all, of course he did it a subscribe and it is a bit of part, that is practically the dtc system would seem the best, where it does not even need the encoder from what I understand and say that the costs are less than making a closed ring control system.

Of course I'm on the side.... the important thing is to understand how you do the controls. The closed ring has always worked.

 

[leonardo000333]

Thank you very much

 

[Chris_BRB]

Here are the calculations carried out, how do they look? thanks in advance
View attachment 57424View attachment 57425View attachment 57426

Axial force should be considered if for example I have a load flowing on skates is the only component of the weight multiplied by the friction coeff. right?

 

[PIETRO2002]

Axial force should be considered if for example I have a load flowing on skates is the only component of the weight multiplied by the friction coeff. right?

If you have an acceleration or deceleration do not consider inertia forces?

 

[Chris_BRB]

If you have an acceleration or deceleration do not consider inertia forces?

excuse the cag***, if I have a movement as mentioned above horizontally I would consider:
_ force of inertia : mass x acceleration that I want (not of gravity)
_ force of friction: mass x coeff. friction skates
_force due to precarious skates: f precarious x n skates

 

[Fulvio Romano]

[...]_ force of friction: mass x coeff. friction skates[...]

weight x friction, not mass. otherwise wrong of an order of magnitude.