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patlhy

Mostly Metal Servo CNC

by patlhy Feb 2, 2017
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Молодец,главное не боится и делает!Кто ничего не делает,тот и не ошибается.Потихоньку и даже такой станок справляется с аллюминем!

hi can i get the .stl file for the x axis leadscrew block( the axis carriage the z axis ) thanks

hello, what maximum size do you suggest for this build? i would like to build bigger size like 1000mm x 1000mm. Do you think it still good enough?

It depends on what you are trying to cut. Maybe it will still work for soft wood but it wouldn't work for hard material. I think the X axis 10mm smooth rod would flex at 1 meter width.

I've just uploaded video of my CNC milling through 2mm thick aluminium. I would be uploading the revised Z axis design soon once I have time. It took me 3 iteration before I got the CNC design stiff enough to cut through aluminium. Right now, my rotary tool flex more than the X-axis smooth rod but I think if you increase the X-axis length, the X-axis smooth rod would flex as well.

Hello, my congratulations fot the design. With what electronics do you control the servo?
A possible improvement: I would pass the leadscrew of the y axis through the center of the profile and the support of the rod would integrate it with the bearing. similar of this http://robocutters.co.uk/prodimages/2040leadscrewset.jpg

Thank you for your Y axis suggestion. In my original design, I intended to use 2 Y axis servo motor to move the gantry. However, I had problem aligning both Y axis lead screw to be perfectly parallel resulting in very jerky movement when both motor are used.

In the revised design I just posted, it is much easier to align the lead screw to be parallel. As such, I've used 2 servo motor for the Y axis.

For electronics, I've used Arduino Mega 2560 running Marlin to run Gcode. I've reused the LCD control panel from my 3D printer so that I can control the gantry position and start running Gcode without a PC.

For servo motor control, I've tapped the STEP and DIR signal from Arduino Mega board and fed it to an Arduino Nano running a code based mostly on the code found in the website below. The PWM output of Arduino Nano is fed into a L298 motor driver board.

https://github.com/misan/dcservo
https://www.youmagine.com/designs/dc-motor-closed-loop-control-software