Quote from: anwar on April 12, 2011, 07:35:00 PM
Do you have pictures and results of your proof-of-concept machines ? Can you post some pictures ?

As requested please do post some pics

The videos are already posted.
I think its enough for the proof of concept.

hmm. I think it will be better to post some pics of the real product or are you waiting to get an order in order to manufacture your first?

I wanted to knw how it looks like.

Amir Sir,
I have few questions regarding the machine.
1. Are these machines servo based or stepper based.
2. Are you using acme, trapizoidal screws, ball screws or belts for transmssion.
Please do post the pics.

Quote from: vksingh on May 05, 2011, 12:24:32 AM
2. Are you using acme, trapizoidal screws, ball screws or belts for transmssion.
Please do post the pics.

This would be very crucial factor. Ball Screws are obscenly costly

Its stepper based with microstepping function.
Built on Ball screws and linear slides.
Linear guideway upgrade will cost a little more.

Pictures will come soon
Thanks

around 40000 to 50000 size 18"X24"X9"

where to get ball screws/acme screws and linear bearings at an affordable price
made a small desktop cnc with diy bearing assembly

Congrats done a very good job. But the router seems to be overkill for this type of machine.
try Makita trim router i hope it will be right size. As far as i know in india ball screws are not affordable. The screw alone cost around 3600/mtr and nut 4500/pcs. However you can visit www.pbh.in for ball screws.

All the best for your cnc machine.

Vivek Kumar Singh
www.rcelectro.com

well thats affordable as i plan for 5'by 9' router in a budget of 2.5 lac

nice job  brother but i have a question its good for 3d design ? its work to any side or only one side?

which software u use for it? solidworks good for it?

Its a real challenge in making a cnc at very low cost , by low cost I mean around 20k .  if your budget is 2.5lac, making a cnc mill should be easy as you can purchase good parts online or get it done to your needs. Perhaps you can get a decent kit for that price.

my budget went high (45k) for the machine u see in in picture because the motors, drivers etc are over kill (12.7 kgcm), industrial grade stepper drivers (from tiny controls, new delhi) and the frame is made from costly bus bar grade aluminium. also this project included 4 steppers as i plan to convert it to 3d printer. the z axis is 9" however due to a design flaw it can engrave 3d upto 2" depth only, however yo can put a 9" high work piece.
as per budget of 2.5 lac the size is 5 feet by 9 feet.
for low cost cnc using square tubes and 7kg cm it is possible to make cnc 0f 24"X24"X4" under 20k from parts online. however linear motion components would have to be diy.
plus there would be cost of the router (5k) or laser cutting head (Rs?) or a 3d printer head.
for cad i use solid edge ST4 and for cam i use mastercam, artcam and vectric software
the cnc controller is mach 3
currently i am working on extruder for 3d print head for printing in nylon.
if anybody needs help for design or construction difficulties you can put questions. i would be happy to help
and yes i won't be making machines for selling, and i am not available all time as i am a marine engineer and i sail for five months
currently i am available for next 3 months 

Did you manage to make a cnc foam cutter?

yes it can mill foam but if you are looking for hot wire cutter you would need four axis controlled design (specially the tapered wings you are looking for ). if you want i can design and tech feed u to build one ( i have time to design only not make one as i'm still working on 3d printer and my next project in april is 5'x9' router)
you may mail me at
ok
here are some links for starter
jedicut http://www.aeropassion.net/index-en.php for 4 axis controller
foamworks http://www.foamwork.net/download.htm for foam design
a machine like these http://www.robotshop.com/foamlinx-hot-wire-cnc-foam-cutter-29-13.html can be built for  30,000
if u use stepper then http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2&products_id=387 or servo motor then http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2&products_id=376
remember most of the drivers use step direction format
u may also need http://www.tinycontrols.com/parallel-port-breakout-board.html or if you are good in electronics http://www.sunrom.com/parallel-port/opto-isolated-parallel-port-interfacing-board?cPath=96
for lead screw and nut http://www.igus.in/wpck/default.aspx?Pagename=drylin_trapezgewindemutter
for temperature control http://www.sunrom.com/power-control/dimmer-board-with-isolated-digital-input
A WORD OF CAUTION :cheap half stepper drivers and cheap unipolar stepper do not give you the required torque and resolution . any type of cnc like the one i ve built or hot wire foam cutter require basic industrial grade products. i have wasted time, money and lots of grey matter over these cheap stuff.

if you are interested in making one then i can tell you how to configure all this 

Hi rajarshi,

Can you please advice on the stepper motor requirement ? How to select . . Etc ..  I want to make a cnc for pcb milling ( hence light work ). ?? Any suggestions?

Hi rajarshi,

I was attempting an CNC design based on slider rails used for server racks but failed in the stating point itself.

Is it possible to provide your frame work diagrams or details?

I will be trying it out with plywood frame work.
Do you use linear slide rails? if so what would be the cost?

Any specific stepper motor driver using parallel port available in india?

Anyway i am trying to make my own stepper driver using DRV8818(TI).
Hope to use arduino for USB to parallel driver...

hi shivela 39

if u want to use arduino then try the software and setup http://www.estlcam.com/ec_cnc.php it works and is free

if u r able to make the driver it should be microstepping at least 1/8 for smooth cnc operation

making frame with ply board is ok if you manage to restrain the flex in strucure, corner joints should be strengthened with aluminium angles

ur job will be restricted to wood and acrylic only

maker linear guide of 608 ball bearing

which cad u use? , if you give me the dimensions ( x,y,z axis range) i will design and send you the cad files
also be specific about the purpose of cnc and material to be cut
this is important as it decides the design, motor size and cost

hi srivatsa 7 to 10 kg-cm (100-140 oz-in) torque , 1/8 minimum microstepping driver, pitch of lead screw/ threaded rod 1 to 5 mm ( M8 threaded rod will suit you fine), give me range of m/c and the components (mechanical linear components like lead screw or timing belt) i will send u a design. basically i need range of machine (x,y,z,limits ) and ur budget for a solution

Hi rajarshi,

I've got a nema 23, 10 kgcm2 torque, 6 terminals and i plan to use in unipolar connection. I've got 3, ~14 inch threaded rod. All M8, and M8, 1 inch long nuts. I still have to figure out a design. For the bearings i plan to do a dyi from board skate bearings and aluminium L angles http://buildyourcnc.com/step1.aspx. ( any suggestions on this?)

For drivers I've scratch built linistepper v2. Which can provide 1/8 microstepping function. I've also scratch built a opto interface. I plan to use 3 steppers in each axis although i have 4 drivers and 4 axis interface board in case i need to in future.

For spindle i have a dremel 4000. Is this fine? ( on second thought i plan to purchase a makita or a bosch colt palm routers?)

For the construction i have to mostly rely on 3/4 inch mdf. As i don't have metal working tools. I haven't thought of the travel along each axis, although i feel 1ft would be sufficient for pcb needs.

Your suggestions are highly appreciated .

Hello everyone,
i m glad to be back on the forum, after around 2.5 years.
Missed aeromodelling more than anything and now i am planning to get started again.
Will be requiring you people's help.

Sir,
Do you have Marble Cutting and engraving CNC machine.

Yes we have. please mail me your detailed requirement at