Stepper Motor Giveaway

[rmteo]

I have 46 (new and unused) of these stepper motors that I no longer need. Any suggestions for a contest (or other method) to give these away - perhaps in lots 3-4 units per winner? You can view the full spec here http://catalog.nidec-servo.com/digit.../pdf/KH42H.pdf

[Heckler]

Wow! What a generous offer.

I would love to get a set of 4... I have been dreaming of building a CNC mill to route PCB's. I have been looking at building the Mantis 9 CNC, but have not started putting together the parts kit. Here is a link to the project. The bill of materials requires 3 - Nema 17's (they look the same)
http://makeyourbot.org/mantis9-1
Do you know if these are NEMA 17?

I could provide you with my UPS shipper number.
As far as a contest... I am comming up blank for ideas. Unless the contest is first come first served!

Thanks Dwight
here is my email
[email protected]

[rmteo]

Yes, they are NEMA17 (42mm. square). The ones I have are probably a custom OEM version - they are bipolar (4 leads) with a winding resistance of 9.8 measured Ohms per phase.

I guess you just won 4 of these motors just for describing your project. If you would PM your UPS account number (and shipping address), I will get them out to you. Total weight is 3lb.

[Demon]

Those look interesting. I'm also in the process of accumulating parts for a DIY CNC machine. I have 4 Minebea 23LM-C Series steppers for the main machine (Nema 23 I think), but I'm also looking for smaller steppers for auxilliary components.

The machine itself will not be breakthrough design, but it's the add-ons that I'm going to put extra emphasis. I have ideas from tool changer to parts magazines to video supervision, that's where smaller steppers like yours and solenoids will come in handy.

Played a bit with Google sketch-up a while back and did some preliminary designs. It's going to be an upside-down design compared to most designs out there; this way I can have my electronics up top and safe from coolant below. I might have more than 3 axis, that's to be finalized later.

The 2 sides will be where parts will be fed, tool changer on a front door, rear will be for ventilation and cooling. I'll work more on that once I get the basic system running.

(this picture is upside-down really, I drew it this way cause it was easier to draw)





Overall it will look something like this:

[mackrackit]

Those motors look about the correct size for a robotic arm I have been thinking about. A small one for demonstrations.

[Bruce]

I could use 4 of these if you still have them on hand.

Can give you our UPS acct # if you do.

[Demon]

...they are bipolar (4 leads)...

Thanks! Got mine yesterday.

I don't see any reference to pin 1 on the datasheet. Is it the pink blob on the connector?

[rmteo]

The nomenclature in the data sheet is somewhat confusing - you can ignore it. The outer 2 pins are "NO connects". The inner 4 are the 2 pair of connections for each phase. You can measure the resistance of each phase - should be about 9.8 ohms.