how to build a drawing machine
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Re: how to build a drawing machine
i could find some motors from my old brocken DVD-Rw
Re: how to build a drawing machine
New topic added, How to control Hard Disk motor using a microcontroller
Rksk,
Remember I was talking about the tray motor of the CD ROM. Accidentally I found a video on that. It's a stepper motor.
Ability to control position accurately without a feedback system (such as using an encoder) is a feature in a stepper motor. Since the angle movement per pulse is well defined, it is easily possible to control the angular velocity using a little microcontroller.
[media]http://www.youtube.com/watch?v=dSKac6EPkrc[/media]
Rksk,
Remember I was talking about the tray motor of the CD ROM. Accidentally I found a video on that. It's a stepper motor.
Ability to control position accurately without a feedback system (such as using an encoder) is a feature in a stepper motor. Since the angle movement per pulse is well defined, it is easily possible to control the angular velocity using a little microcontroller.
[media]http://www.youtube.com/watch?v=dSKac6EPkrc[/media]
Re: how to build a drawing machine
Information here are related to donation topic here.
According to the doc How it Works.docx, you will need to apply an edge detecting filter to convert the source picture to machine printable drawing. This subject comes under Computer Vision -> Edge detection. I would like to propose either Sobel or laplacian filters.
Source Picture Destination machine printable drawing First you need an image reader (Such as JPG reader) and then apply this sobel filter to get the edges that are ready to be sent to the printer. Finally output the data line by line (called vector graphics).
I can help you to do this since I have done these in past. Let me know.
According to the doc How it Works.docx, you will need to apply an edge detecting filter to convert the source picture to machine printable drawing. This subject comes under Computer Vision -> Edge detection. I would like to propose either Sobel or laplacian filters.
Source Picture Destination machine printable drawing First you need an image reader (Such as JPG reader) and then apply this sobel filter to get the edges that are ready to be sent to the printer. Finally output the data line by line (called vector graphics).
I can help you to do this since I have done these in past. Let me know.
Re: how to build a drawing machine
Keep these circuit diagrams with you guys.
Power supply
Since the motors are 12V, find a 12V / 2A transformer to suit both needs. 7805 will provide essential 5V and power to the uC (microcontroller). Stepper motor control with ULN2003 Oscillator & MAX232 Lots of exiting things to happen
Power supply
Since the motors are 12V, find a 12V / 2A transformer to suit both needs. 7805 will provide essential 5V and power to the uC (microcontroller). Stepper motor control with ULN2003 Oscillator & MAX232 Lots of exiting things to happen
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Re: how to build a drawing machine
2) Cartridge Holders
3) Stepper Mortes x 3
4) Normal DC motors x 2
5) Belts x 2
Neo, can you make this pic small i dont know how to do it
Last edited by Neo on Thu Aug 11, 2011 11:40 am, edited 1 time in total.
Reason: Image resized and uploaded :)
Reason: Image resized and uploaded :)
Re: how to build a drawing machine
So you have enough items to give a start. Next thing is to give a start. I'll give you some guidelines.
First thing is to design the structure. I think threaded rods can be easily used for moving parts. You can easily find them in local hardware shops.
We can discuss about the electronics part later.
First thing is to design the structure. I think threaded rods can be easily used for moving parts. You can easily find them in local hardware shops.
- Sample structures
Another sample structure: The one in https://robot.lk/viewtopic.php?f=75&t=2594#p7607 is also a good example.
1, 2 and 3 are 3 threaded rods that are fixed to 3 stepper motors to move along x, y and z. - Threaded rod
- Mounting motors to threaded rod
- Fixing the other end to a Ball bearing
- Fixing a nut to moving part
- Once we are done with the structure, it's about moving the motors in x, y and z directions using electronics.
We can discuss about the electronics part later.
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Re: how to build a drawing machine
shenal is working on the electronical parts, and im working on the structure shenal have an idea about moving the pen up and down without the stepper, he will explain you when hes done with it,
Re: how to build a drawing machine
I guess he is going to use a solenoid? If that is the case, I think it's a good idea as long as he can control the pen on hitting the paper slowly (using a spring may be) to avoid damage to both paper and pen. We can discuss that later.shenal have an idea about moving the pen up and down without the stepper
Good luck!!!im working on the structure
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Re: how to build a drawing machine
we finished making the structure! Nw we have to do the electronic part! I wish shenal will reply here soon!
Re: how to build a drawing machine
A picture is worth a thousand words !!!
Can you update with some pictures.
Can you update with some pictures.