Surplus motors

[Inventthis]

Tom
How do you disable the brakes (is there a way to remove them without destroying the motor?)
What's the lead time on the 2030 drive?
Have you tested the 1000W motor yet?
Thanks

[Al_The_Man]

You are probabally better off to a constant supply 24vdc. In one case I just wound a secondary on the power supply toroid with a bridge and small electrolytic. the wire gauge can be small as it is less than 1amp load. This way the brake picks up whenever the power is on to the DC supply.
Al.

[wallygator99]

So, say that these AC servos work with the rutex driver. Isn't the next step to design a power supply? Their is lot of info on making a DC power supply, but what about an AC supply.
It appears that even with inexpensive AC servo and rutex drivers, it is still more then a gecko and a say, Ametec DC servo. ? What will a AC supply cost to make? Are these AC servo worth and extra $50-$75 per axis?

Comments

P

[ger21]

You don't need AC, you use a DC supply to the Rutex. The Rutex is $85 more than a Gecko. The AC servo is $40, including a 2000 count encoder. Can you get a comparable DC servo with encoder for $125? I haven't seen any? I was planning on using Gecko 202 with Vexta 400 oz-in steppers on my next router. The AC servos and Rutex are cheaper.

[FastEddie]

Thanks to everyone for all the great info on these motors. I had been thinking steppers, because a servo system seemed way out of my budget. Thanks to all the encouraging info here I just put my order in for some 1000w. Only 41 left!!!
Get them while you still can...

I can't wait to see some of the great machines that will be made with these...

[wallygator99]

So, yep ac servo are ordered. Any pointers on the power supply?
What size of toroid for 4 servo setup, cap size, and rectifier size?

Thanks

[PEU]

Can the encoders be used for something else, the $29 motor sound interesting for doing it. Thanks


Pablo

[JFettig]

The motors are worthless without the encoders, the motors are worth much more than that, expecially at the quanity. I advize you not do that.

Jon

[PEU]

I hate when this happens, the large motors are 17lbs each and maximum shipping allowed by USPS to Argentina is 44lbs...

What size of fast router for cutting wood can be nicely done with the 400w ones? I want to take advantage of the deal but I have the 44lbs limit

Thanks

[JFettig]

for a router, the 300w motors are great plenty...

I ordered a few more motors, 3 300w and 1 more 400w(total of 4)

Here is updated IGES and SLDPRT files of my motor that I measured.

Jon

[damae]

Wow, they're down to 20 motors left, down from 30 motors just over an hour ago! All those of you who were lurking and learning about the motor, are you now jumping on the chance at the last minute?

I bought 6 of the 1kw's and they arrived very well packed, in the original unopened boxes, very obviously genuine Sanyo Denki packaging. The writing printed on the inside of the box is in Japanese.

I am also excited to see what people will do with their motors! Two of my motors will end up on my router project:

http://www.cnczone.com/forums/showthread.php?t=11786

Here's a close-up of the wires coming out of the motor:

[xyzcnc]

I know a lot of us are banking on the rutex drives working properly with these motors. We might see a bunch of these back on Ebay if they don't. Any more updates/results with rutex drives?

[DerekZahn]

Well looks like the great motor goldrush of 2005 is basically over (some of the lower wattage motors are still left).

I have a feeling there will be a lot of interesting discussion over the next weeks/months about using these motors. Also I have a feeling that Rutex might want to stock a few extra 2030s!

I even ordered one of the 1 kW motors yesterday; maybe I'll use it as a spindle motor; maybe I just didn't want to be left out of the fun!

[Evodyne]

Well looks like the great motor goldrush of 2005 is basically over (some of the lower wattage motors are still left)....I even ordered one of the 1 kW motors yesterday; maybe I'll use it as a spindle motor; maybe I just didn't want to be left out of the fun!

Yup, me too. Don't know why, as I don't even really need them. I guess it was just to good to pass up! Now for the power supply....

Evodyne

[Al_The_Man]

You may have noticed, the combined Sanyo-Denki supply and amplifier for one 1Kw motor is rated at 2.5Kw.
Al.

[damae]

You may have noticed, the combined Sanyo-Denki supply and amplifier for one 1Kw motor is rated at 2.5Kw.
Al.

Al, where did you see that?

[rutexus]

Gentlemen,

I'm away until Monday evening. I did not get time to try the 1000 watt motor, but Vladimir said a similar motor he was aware of worked fine with the R992H. I'm confident they will work too-enough that I ordered 10 1000 watt motors myself. I warned him about the expected orders. He said he still has some R992H's to sell, and that there was a slight delay (caused by him being so busy programming some of the windows support programs for his plasma control) on the motors arriving by the first week of November as scheduled, but that they will be out real soon.

Tom Eldredge

[Al_The_Man]

Al, where did you see that?

PDF attached
Al.

[m_j01]

I have a thought regarding braking resistors for the Rutex R2030 drives and the Sanyo 1000W motors. How about putting a diode in parallel with the resistor in the direction that the current will bypass the brake resistor in normal mode and then block the current when we have back EMF (Similar to the body diodes of the MOSFETs in the H-bridge)? This way we only have the voltage drop over the diode under normal conditions and the resistor is doing its thing for back EMF. It should give us less power dissipation in the resistor as well. The diode needs to be rated for at least 20A continuously. Any problems with this approach?

Thanks,
Mats

[Evodyne]

Gee, I wonder if SurplusCenter will be kind enough to offer those drives for, I don't know, $50.00 or so? Maybe if we ask real nice?? (...reality sets back in...) Um, probably not. :frown:

Evodyne