Supplier of Steppers

[Nigel_B]

Hi All
I want 4 steppers
190 to 260 oz in, bipolar, 3 to 4 volt, nema 23
Where do you suggest I buy them Oz, US.
I really have no idea, apart from places that supply kits, is there a better way?
Please don't suggest ebay, I would be happy to buy new ones if I can find the right place to get them.
Nigel

[wildgrav]

Australian Distributor for Portescap motors The full product range can be seen at www.motiontech.com.au

[wildgrav]

http://www.kelinginc.net/index.html for OS supplier

[finance]

Originally Posted by wildgrav http://www.kelinginc.net/index.html for OS supplier

I bought three KL23H276-30-4A just before Christmas from Keling, good communication, good service, reasonable prices. The steppers work well.

Shipping to Canberra (via USPS) took around two or three days after placing order (can't remember exactly) shipping cost was US$40.
I originally was going to get four but shipping went up considerably because of the order weight - I'll place another order for three when I do my lathe then I'll have two for the lathe and the other one for the mill's fourth axis.

Hint: Whoever you get stuff from in the USA get them to send it USPS. Fedex and UPS charge like wounded bulls! I don't buy anything from the USA unless they can ship via USPS, if they don't appear to do it - just ask.

Cheers,
Dave.

[Pete Stenabaugh]

Nigel, the best source you can likely find for steppers is at www.homeshopcnc.com

I doubt you can find better motors or any cheaper, just contact Rick for more information. He has Nema 23 steppers up to 500 oz in right now...(3/8" shaft)

I have purchased several from him and he is great to deal with.....

Pete

[Nigel_B]

Hi All
Have just asked for quote from Homeshopcnc
However Keling Inc have offered 4 x 282 oz steppers an 2 Gecko 202 drives at a good price.
When importing these type of goods are there any customs/duty type fees to allow for?
Nigel

[Pete Stenabaugh]

Nigel. you would have to check with your local customs office, where ever that might be. The customs importing rules are different for each country. I live in Canada, and the importing of items between Canada and the US is fairly easy for most items now, due to the free trade agreements, but it may be somewhat different for Aus.

I would recommend paying the difference in price between the motor you think you need, and the 500 oz inch motor that homeshopcnc has available. There is no substitute for power and it is recommended that you have a motor large enough to provide approximately twice the power you think you will need. Besides, the price difference between these motors is likely only about $20 each. Rick has prices listed on his site, so you can do some comparision on line. The 500 oz motors are only about 3/4" longer that the smaller sizes, they are also newer technology, and somewhat more efficient.

Depending upon the amperage available from your controller, you may or may not have all the 500 oz power available, but you will still be ahead of the game with the larger motor.

I also recommend using dual shaft motors as this gives you the ability later on to add rotary encoders to each motor, to give you accurate position information.

Pete - good luck

[finance]

Originally Posted by Nigel_B Hi All Have just asked for quote from Homeshopcnc However Keling Inc have offered 4 x 282 oz steppers an 2 Gecko 202 drives at a good price. When importing these type of goods are there any customs/duty type fees to allow for? Nigel

Nigel,
You don't have to pay any customs or import duties in Australia on that sort of stuff if it comes USPS (see my earlier post about shipping!), although I think there is an upper value limit - over which you will probably have to pay but then shipping charges make it an uneconomical proposition anyway once you get heavier parcels - best to get them to ship in smaller/separate parcels and that should cut down costs and you will definitely avoid any possibility of customs etc charges. But you need to ask whoever you're buying from how they are shipping and what the cost is and work it out yourself, most will happily ship however you want.

The three motors I got from Keling came through with no problems, same with the Xylotex drive and I have also ordered/received a fairly large box of hardware (ballscrews etc) from McMaster with no customs etc.

A word of caution on the size of stepper motor you are contemplating, I note that a 500oz motor has been suggested. I have seen posts elsewhere that say not to use motors that are over rated for the task, i.e., if you only need 200oz steppers to do the job don't use 500oz ones. The reason given is that larger motors are inefficient if they are not working closer to their designed power output and (I think was stated) can overheat.
Can't remember where I saw that but I'm pretty sure I have seen it in a couple of places. Do some searching and ask questions before you make a decision on motor size.

Cheers,
Dave.

[tasrobotics]

Hi I have just found this site in au that has steppers and controlers.
http://www.oceancontrols.com.au/
Regards Stuart

[Greolt]

Just to add to what Dave said two posts up.

I asked HomeshopCNC about torque curve on those 500 oz steppers and they said that they drop off dramaticaly after 400 rpm.

Depends on what rpm you are expecting at ipm you are aiming at.

My purpose tops out at about 300 rpm so they will suit my needs.

But your needs may require more rpm and may be better with say the 269 oz ones.

So look at the info and try to make a good decision. Bigger is not always better.

[epineh]

Thanks for the link Stuart, I might order a couple from them myself

Russell.

[finance]

Originally Posted by tasrobotics Hi I have just found this site in au that has steppers and controlers. http://www.oceancontrols.com.au/ Regards Stuart

The problem I have found when shopping around is that it is very difficult to find an Oz supplier who stocks what I want, and those that do have prices that are way too high.

As an example:
The three steppers I bought from Keling in the USA, when you take postage into account, cost me around AU$66 each (3 x US$39 + US$40 postage), the roughly equivalent motor from Ocean Controls costs AU$97.90 (GST inc) and then you have to pay postage on top of that!

Whilst I am as keen as the next man to support Australian enterprise, it's no contest I'm afraid.
Cheers,
Dave.