[eSilviu]

What do you think about this machine?
It took me about 3 weeks to build-it from scratch, but the results are very good. Cnczone was very usefull.

Things left to be done:
- arrange the wires
- mount limit switch and Estop
- update to a 3 axis microstepp driver (i would like to use the new A4983 allegro chips)
- buy a USB CNC controller
- build an automatic speed controler for motor (it is a cheap 220V/115W driller, but is working very well in DC too - so it's easy to control the motor voltage to get different RPM; tought about encoder-PIC-pwm-PowerMOS to set the speed)

You will see the tools i have been used, and the result (2 pcb)

[rustamd]

Machine is looking pretty good, what are working dimensions?

Is there reason why you want to use USB?

[eSilviu]

Machine is looking pretty good, what are working dimensions?

30/30/8 cm (forget to mention)

Is there reason why you want to use USB?

i want to use my notebook;
usb will be much smother as parallel port;
i do'nt want dos mode for a computer.

[eSilviu]

arranged the wires, and maked a small project:
a Nokia 3310/3410 display to be used with my 16FXXX

all made with my cnc (except display, ofcorse )

[eng_amer]

please anyone has adocumentation about
using USB with pic microcontroller?

[InControl]

I LIKE IT

[blackbeard52]

please anyone has adocumentation about
using USB with pic microcontroller?

http://www.create.ucsb.edu/~dano/CUI/

Bob

[Richster]

Have you got any pics of the anti-backlash configuration you have mentioned? Would be interested to see this, since I have much the same leadscrews and leadnuts.

Thanks

[eSilviu]

Hello,
This time took me about 1 week to complete the mechanical part of this. I wanted to be cheap... very cheap, and with components that can be found in any hardware store.
Used:
- drawer sliders;
- Al frame - square;
- Al frame L shape, 2mm/3mm thick
- some Al sheet (2-3mm thick);
- blind rivets;
- M4 nuts and bolts;
- M8 acme thread;
- hard plastic as M8 nut;
- aquarium tube;
- steppers
- MDF 30x30 cm
Tested only one axis at time, with manual jog, and seem to work properly. Backlash is zero at the moment - but probably will appear soon. Seem stiff enough - more than enough to mill and cut PCB.
After I finish the electronics part, I will test-it more.

Thanks for watching and sharing your opinion

[GLynnC]

The first machine at the top of the page , what kind of tubing and bearing setup is that and where did you get it from.

[eSilviu]

The first machine at the top of the page , what kind of tubing and bearing setup is that and where did you get it from.

There are 12mm round rod with associated bronze bushings. I get them from A3 XEROX inkjet printer (don't remember the model). Steppers are from that printer too.

[wktina]

it looks nice

[Jesse B]

Very nice looking machines.

[GLynnC]

There are 12mm round rod with associated bronze bushings. I get them from A3 XEROX inkjet printer (don't remember the model). Steppers are from that printer too.

Very interesting , thanks for the reply.

[eSilviu]

Hello,
I've started with the idea of building a PCB mill with 10x16cm working area (Eagle light limitation, more than enough for 90% of my PCB's).
I've ended with a mill with 15x21cm working area, and 7cm of Z travel.
Working good until now: attached a sacrifice MDF, and leveled the working area.
Pictures represent:
- whole mechanical CNC
- nut-spring-nut used for Y axis
- controller + manual jog + bipolar drivers for steppers
(controller = CNCUSBController from Kroko)
- stepper drivers = A3979 based, and are working amazing from a 12V power supply
- RC outrunner used as spindle for milling PCB's (has 3.17mm inner bearing diameter ), well.. milling PCB’s needs only about 15W of power!!!
- 2x12V,2.5A power supply - one for controller and one for spindle
- I intend to put all electronics part on the back of machine
- a small PCB milled just for test (the one with larger isolation tracks was obtained by running the same g-code for about 15 times, just to see what will happen); note: there is no software compensation for backlash!

Merry Christmas to you all!

[Jesse B]

Looks great! Get those electronics organized and you're good to go

[cflas]

Looks great guess I will have to start on one here shortly. Love all these post with very positive results. I have a dremel and a sears 1/4" router and will use those as proto types. if all works good then I would start a search for the famous porter cable 1/2".

[eSilviu]

this is how I've started..
it was the first attempt to do a cnc.
alltrough it wasn't any real use, it helped me to understand all weak points of the design, and to find better solutions.

[jjobezo]

What are you using to control the spindle motor?

[Jesse B]

Seeing as he's using an RC Outrunner motor, I'd assume he's simply using an ESC, and feeding it a PWM signal from some source. I'm sure he'll let us know though