A New Mini-Contest for the Holidays!

[Evodyne]

Hi everyone!

The Holiday spirit has taken a hold of one of our members. He aquired a few stepping motors for his own use and would like to offer a set of three to one member-in-need. What are being made available are two 100 oz-in, 1.4A unipolar 5.2v. steppers and a third somewhat smaller unipolar stepper. I'll try to get more details, but for now that is all I know.

These are the rules the donor has asked me post, in his own words:

1-As motors are easily bought on e-Bay for North Americans, I'd like these to go to anywhere but Canada and the U.S. Entry must include your location and we need to be able to ship to you from Canada.

2-Entry must include pictures of the unfinished machine.

3-Entry must show either a driver already in hand OR a complete description of the drive(s) that will be driving the motors. This will help ensure the motors are a fit for the drives used.

4-These are not for resale; if they are not used just give 'em to someone else...

5-One winner is to be selected on ???. (Christmas eve was suggested, but it's awful close already. I'm going to hope our donor won't be offended and say that all submissions need to be in by the end of this year and that a selection will be made on January 1, 2006. -Evodyne).

If you are on a very tight budget please note that shipping costs will be "taken care of", so this is a 100% free deal!

Guys, this is for the builder who needs a little help. Any entries that don't meet the posted criteria will be deleted. One entry per member, please. Our donor will determine the winner and his decision is final.

I will post more information on the motors as I get it. Till then, good luck! It's very heartwarming to see such generosity and consideration for other members who need a hand. Thanks member-X!

Sincerely,

Evodyne

[mendez]

Hi my name is Jose, Im currently a college student adn well Im building a cnc machine and I have all the panels and rods materials but since on my location I dont have to much tools so I decided to a seller on ebay that he will buid my machine for me .

I already buy the hobbycnc board that cost 79 dollars, I already post something about help on wich parts I will need, I was planing on buying some economical steppers that I found on ebay, but well anyone knows what could happend so...

anyother thing yo need please let me know. Thanks
Here is a picture of the cnc that a guy will build for me for 275 dollars, doesnt include steppers, driveboard etc.. only the cnc machine..

http://cgi.ebay.com/ws/eBayISAPI.dll...DME:L:RTQ:US:1

[smeghead]

hi im smeg,living in england, and would like to win this one, am currently trying to rustle up a pic controller, based on the u2 firmware from dakeng(cant seem to get to grips with eagle grrrr) and outputing through some 2n2222's . havent started to builds a machine yet, as i would like to have the electronics up n tested first, but have an old drummond round bed and an old mini lathe(mini lathe is favorite to convert at the mo) in the workshop that i might convert. if you need any more info's please ask

[Evodyne]

Hello everyone.

Here are some motor specs from our benefactor:

Astrosyn-Minebea Stepper Motors
Model: 23LM-701-01
Step Angle: 1.8 Degree
Drive sequence: Unipolar (6 wire) (can be wired bipolar too)
Rated voltage: 5.2V
Rated current: 1.4A (1A as bipolars)
Winding resistance: 4.2 Ohms
Holding torque: 100 oz-in
Weight: 2lbs each
Frame: Nema 23 - Double Stack

My small router goes up to 40IPM @40v with good drivers and those motors.

NOTES:

The shafts have spiral tooth gear and will require a 15/64 coupling instead of the standard 1/4" (see picture).

If you wire those as serial bipolars, you would get up to about 140 oz-in of holding torque but trade off some speed. They can also be ran as half-winding for 100oz-in of torque at double the speeds of serial bipolar connection.

Z Motor:

The motor supplied for the Z is a Brother 8 wire stepper with 4 Ohm resistance per coil. This should be way below 1.5A and can be wire serial or parallel bipolar. The lack of spec is kind of compensated by the flexibility the 8 wires bring. I expect a good 80-85 oz-in of this one. For a Z with higher TPI (5/16-18 or 3/16-20), it's perfect. I used to run a motor half this size and still get 14 IPM on Z.

Please see the attached picture-Evodyne

[Evodyne]

I'm a bit suprised! I expected to log in today and see many more entries. The motors being offered are free and the shipping is free-what more could one ask for??? Let's get those entries in guys! You have until midnight of December 31st, 2005-so there is still plenty of time.

Evodyne

[mendez]

Hi, the guy who is building my cnc just email me a picture, here is my machine :-)

[Rodm1954]

This is a terrific gesture and thanks to Member - X for the donation. CNC gear is difficult and expensive to source outside America so good luck to the winner and I hope to see a finished machine as a result.

This post can be deleted as it isn't a competition entry but I wanted to acknoweldge the contribution.

[mendez]

Hi I receive today a picture of my cnc all finished , here is the picture...

[smeghead]

A quick update i have scrapped the idea of using my own design controllers and will be using the linistepper controllers,have just noticed the steppers in the contest can be wired in bipolar mode so i could also build the pic step boards and see which set of drivers work best, i have also added ballraces to the clarke mini lathe crosslide screw so it turns a whole lot smoother. just need some steppers now

[mendez]

Today is the Day... :-)

[Evodyne]

Hi everyone.

I just got an email from our Member-X and I now know who was chosen to win the package of motors. May I have a drum roll please......

The winner of the 2005 Member-X motor-madness giveaway is.....

Jose Mendez of Mayaguez, Puerto Rico!!!!!

Congratulations Mendez! You posted pics of a fine looking machine and I know it impressed Member-X. Here is what he had to say:

"Let's make that nice little machine roar. The black machine is a winner in all senses. I hope to see parts cut pretty soon. It would be nice to ask Mendez to update the post with a few parts that he did with the machine, as an incentive for others to participate. We might do this again..."

Smeghead, thank you for entering too. Unfortunately in these contests there can only be one winner. Keep trying!

Well that's it guys. It's a wrap. What a nice gesture for one member to offer up parts with no thought of gain just to help another. Thanks so much Member-X!

Mendez, in order to get your package on its way I need to get your complete shipping address to our donor. Would you please send me the information via a private message? Thanks!

Evodyne

[mendez]

Hi, and thanks for picking me :-) , THanks to Evodyne and Member-X for your geenrositi on donating it and creating a contest so people who wants to build something could had a chance to doing it. Here are 2 pictures of what I have been doing over the last 2 months, is a carbon fiber part for an RC Car, is on carbon fiber, I made it with a dremel but very soon I will be doing it with my CNC at soon it gets on my hand.

Ohh and Happy new year