I am quite happy to continue to participate in this discussion

Ok. Me too. We were at ... #309 . Re-read it. And start putting something on the table. I already have some ideas but untested. Tests will tell how good they are. Until then...

 

hi q12x,
We insist, if this Thread is allowed to continue, that it concentrates on the original technical topic and does not get into personal attacks on fellow members who are trying to help.

If you consider you have a complaint about a fellow member's post, use the Report option.

Moderation.

 

We insist...

No need.

If you consider you have a compliant about a fellow member's post, use the Report option.

No need. What I had to say, I said it already, even if it was a bit brutal, I admit it, the fault was mine. I was a bit upset. But I can not have anything against anyone. Even if they tell me that and that. You know I have the greatest respect for...lets not say _everyone but for a large majority of people here. No trouble from me. Cross my hearth. And I also understand that was some sort of moderation from that guy that intervened. In a pure american style.

 

Ok. Me too. We were at ... #309 . Re-read it. And start putting something on the table. I already have some ideas but untested. Tests will tell how good they are. Until then...

Hello again,

I also had an idea about #309 last night. It may involve you spending a little money (hopefully not too much!), but may take a day or so to get something together if it works out, so be patient.

 

It may involve you spending a little money

I too, rub this problem to my neurons.
I have indeed find a very simple solution that cost absolutely no money !!!! Hahaha.
But I have other problems with some details that are not related to spin itself but enhancements if you will.
Actually I found 3 solutions but 2 of them are too complicated and also incomplete.
Either way, I am curious what you will come with (expensive or not).
We are not rushing anywhere so take your time.
---
In the meanwhile, slap on my forehead, 28BYJ-48-5V 5wires 4phase4coils motor is heating. I tested it for a little while. The main power is 6V, sometimes 7V. It is the power that goes directly in the coils of the motor. After that, it is going into the VReg and to the logic side of the cct. This 28BYJ is made to work at 5V. So thats the most obvious reason why is heating. Over voltage ! Now, the entire logic cct I have there + motor driver, is not working under 5.5V. Because the main VReg is regulating to 5V already. The minimum Voltage is 6V for the entire cct, including the motors. I didnt observe this issue faster. Damn. So, to drive 4V and 5V small motors, I will probably have to make and link a NEW VReg to the rails of the motor, somehow, and then a switch between <=5V and over 5V motors... pain in my dorsal. If you have better ideas about this inconvenient detail, do put it on the table. The simpler the solution, the better. Thank you.

 

Like I said many posts ago, @sarahMCML needs to change her user name to StSarah.

This isn't the first thread that q12x has totally ignored members help and insisted he was the only one to do things correctly.

 

This isn't the first thread that q12x has totally ignored members help and insisted he was the only one to do things correctly.

I see, you adopted the tactic of ALL against me. Very well then, I will stop this conversation.
In fact I will do exactly what the first guy suggested and I will erase this thread all along.
Im sorry you put me into this position.
I really thought you understood what I said earlier.

 

I see, you adopted the tactic of ALL against me. Very well then, I will stop this conversation.
In fact I will do exactly what the first guy suggested and I will erase this thread all along.
Im sorry you put me into this position.
I really thought you understood what I said earlier.

That’s unnecessary. Please continue, @sarahMCML is willing to do so and if you just go on things will be fine.

 

I really thought you understood what I said earlier.

I haven't really understood why your even doing this, or much of what you have said. No matter what home made circuit you end up with it won't be practical for anything. First off it is going to be too big for most control boxes and it won't be able to work with any other type of controller to move your steppers. so then you have to come up with another complicated control circuit.

you truly sound like a teen age or younger person. Are you? Instead of complaining of having no money to buy even very inexpensive things to do what you want reliably get a job. Then you will or can have the money.
Being a crybaby in life doesn't help you or any one around you.

 

I haven't really understood why your even doing this, or much of what you have said. No matter what home made circuit you end up with it won't be practical for anything. First off it is going to be too big for most control boxes and it won't be able to work with any other type of controller to move your steppers. so then you have to come up with another complicated control circuit.

you truly sound like a teen age or younger person. Are you? Instead of complaining of having no money to buy even very inexpensive things to do what you want reliably get a job. Then you will or can have the money.
Being a crybaby in life doesn't help you or any one around you.

I think that this is as much a learning experience as anything for Mr q12x, rather than a final product. If he wants to carry on with his project in this way, I am more than happy to help if I can, as long as we can remain civilized.
As far as his post #327 goes, I have just this moment read it, and subsequent ones, having been working on the circuit he requested in post #309.
I have to knock off for now, I need to prepare dinner and look after my partner. I may get a little time later tonight to respond more. Cheerio!

 

Can we please get back to the topic of this thread and stop discussing personalities?

Edit:
The discussions is bordering on violation of a provision of the User Agreement.
"Debates should be a civil activity and can be both enlightening and entertaining, but always keep discussion to the facts and the opinions. Ad hominem tactics and directed abuse are always 'out-of-bounds'."

 

I too, rub this problem to my neurons.
I have indeed find a very simple solution that cost absolutely no money !!!! Hahaha.
But I have other problems with some details that are not related to spin itself but enhancements if you will.
Actually I found 3 solutions but 2 of them are too complicated and also incomplete.
Either way, I am curious what you will come with (expensive or not).
We are not rushing anywhere so take your time.
---
In the meanwhile, slap on my forehead, 28BYJ-48-5V 5wires 4phase4coils motor is heating. I tested it for a little while. The main power is 6V, sometimes 7V. It is the power that goes directly in the coils of the motor. After that, it is going into the VReg and to the logic side of the cct. This 28BYJ is made to work at 5V. So thats the most obvious reason why is heating. Over voltage ! Now, the entire logic cct I have there + motor driver, is not working under 5.5V. Because the main VReg is regulating to 5V already. The minimum Voltage is 6V for the entire cct, including the motors. I didnt observe this issue faster. Damn. So, to drive 4V and 5V small motors, I will probably have to make and link a NEW VReg to the rails of the motor, somehow, and then a switch between <=5V and over 5V motors... pain in my dorsal. If you have better ideas about this inconvenient detail, do put it on the table. The simpler the solution, the better. Thank you.

If you are still watching, please respond!

I'm very interested in what you found that won't cost anything. My circuit IS getting a little complex, but might be because I'm trying to add more things than are required.

But over to the second part of your query. With your 28BYJ-48-5V 5 wire Unipolar motor, are you trying to drive it with the ULN2003 board that came with it, or the L298N board setup? If the latter, I think I know why you have a heat problem. Let me explain.

If you go back to one of my posts #265 where I include scope pics showing unipolar stepping, you will see the pulses stepping high one line at a time in sequence. That means that one coil is being driven positive on each step, but the other 3 coils are being kept at 0 Volts for three quarters of the time.
But you have the common line of your motor connected to +5V, so the step pulse driving the coil high is doing nothing here, but the 3 other lines being held low are all drawing current through the other coils!
This is probably why the motor is getting hot.
You need to connect the common wire to 0 Volts instead of +5V, and in that way the coils will only get current when the pulse goes high. This bypasses the current sense circuitry though, so the chopper circuit won't work!

On second thoughts, you could possibly connect the common wire to the top of the sense resistor: I don't think the lower transistors would have any effect on the operation. Might be worth a try!

 

RE:""we can use a couple in parallel for dealing with greater power""
You ought to take in consideration that as many transistors You paralell, so many-fold they become slower. Yet IRFZ44 is rather rapid, but it dedicated dark side is the SMD type of cooler what must be soldered-on the body. Thus I would never use it except the small power cascades what are boosted by stronger transistors in TO220 or even TO247 body.

 

RE:"" MaxHeadRoom Joined Jul 18, 2013 26,009 Oct 12, 2022

• #7 I have never used any of the Chinese manuf. drives""May assure them are just identical to American ones from what it been stolen some time ago, only 100x cheaper and 2x less trusted.