CNC parts and supplies in NZ

[blasttiod]

Hi all from a newbie,
Could anyone tell me any suppliers in New Zealand please for the parts to make my own CNC router.


Regards

[blasttiod]

Hi all,
Has anyone got any info on where I can purchase CNC parts in New Zealand Please. Regards

[dearlovr]

what sort of parts are you after , stuff is available , price is another matter

[blasttiod]

Hi dearlovr,
Thanks for answering.
I'm looking for 3 stepper motors(for x,y,z), stepper motor controllers and LPT interface. Because I don't really understand things I'm looking for either a kit or speak to someone who can help me put the items together.

Regards
Kevin (New Plymouth)

[dearlovr]

I got some quotes from these guys , have attached , I built my own parallel port interface , I will advise if i see a commercial one , havn't purchased any from these guys as am also looking at servo drives as i need fairly high powered units .

Hi Russel,

Attached is a pdf of our latest prices for the Lamtech range of products
and some brochures.

Best regards,

Nico Diedricks

Flexible Automation Ltd.
Tel: 09 273 5170
Fax: 09 273 5190
Web: http://www.flexibleautomation.co.nz

[dearlovr]

Oately electronics in australia have the stepper driver kits , parallel port interfaces and constant current source units that you will need
http://www.oatleyelectronics.com/ have got some stuff from them years ago without a problem .

[blasttiod]

Hi,
Thats great, just what i'm looking for and not to pricey.....

Just got to find some steppers at a reasonable price.

Thanks for that

Regards
Kevin

[blasttiod]

Hi dearlovr,
Been looking at the oatley site. Am I right in thinking I need the following:
K142A x 1
K142B x 3 (if I get the 4 wire motors)
K142C x 3

I'll then need to source some kind of power supply for the motors ?

Also could you tell me the diffence between 4 - 5 and 6 wire motors ?

Regards
Kevin

[dearlovr]

stepper motors commonly are 4 wire , 5 wire and 6 wire , basically there are 2 coils , 1 wire for each of the ends of the coil and in the case of the 6 wire a wire that is connected mid way thru the coil , 5 wires are just that 2 of the connections are paired to minimise duplication , check the web or stepper documentation for detailed view on how they are wired .
see http://www.educypedia.be/electronics/motorstep.htm

parts list looks good , the constant current units will ensure torque available thruout rpm range , real trick is to determine what size of stepper that your rig will require , cnczone is the place , just see what others have done , also utube has some great video's of homemade cnc units , but do look around , I've read some good articleson the web about turning dc motors into servodrives as well . http://www.truetex.com/machinery.htm

[Big S]

You can get some cheap steppers at New Age Materials in Wellington,
http://www.trademe.co.nz/Business-fa...-158677149.htm

They had some different ones to the auction above that were better but still only around 130oz/in.

Shannon.

[FieldingBlue]

blasttiod,
I'm currently building the same kits that you refer to. I'm pretty happy with the boards and components. I'm not so impressed with the instructions but there is enough info there to muddle through.

There is one point to watch with those kits. The driver boards are supplied with MOSFETs which are rated at a lower voltage than the supply shown in the diagrams. If you want to use the max supply voltage you will also need to purchase replacement MOSFETs for your driver kits.

Working out the size of steppers to get was/is a problem for me too. I tried to derive some equations from first principles but I'm not that good a physicist. So I ended up using a rule of thumb I found on this site: http://buildyourcnc.com/torquemotion.aspx
There is some fiddle factor in there because you have to take your best guess at the friction in your system. However it gave me a warm fuzzy feeling that I was in the ball park. I assumed that I would have 50% efficiency, which is reasonably conservative.

[blasttiod]

Hi fieldingblue,
Thanks for you input. Out of interest what spec motors are you going to use and are you building your cnc from a plan ?.

Although I've been looking at the Oatley Electronics stepper drivers I have been told that they won't microstep.

I'm still finding out things and reading as much as possible before making a purchase, so any further info you might have will be greatly received. Have you any pictures of your build ?

Kevin