AMC B100A40AC and shunt

[Karl_T]

I bought this drive on the bay:
http://www.a-m-c.com/download/datasheet/b100a40ac.pdf

It's for a 10 horse brushed DC spindle on a Matsuura bed mill using a Galil card and Camsoft refit.


This thing will likely have over voltage issues slowing down. On page two of the manual above, and on the dirve itself, it looks like you can just use a resistor. I have no idea what size.

AMC also shows these
http://www.a-m-c.com/download/datasheet/srst.pdf

Are these necessary for this use?

Karl

[Al_The_Man]

They already have internal shunt switching circuit, and a 20ohm resistor, the rating of the internal resistor is 180watts.
If there is repetitive high speed braking then you may need to fit an external one of the same ohms value but higher wattage rating.
The regulator comes in at a bus voltage of 390dc
Al.

[Karl_T]

Thanks, I'll start shopping. I assume the internal one must be disconnected? How?

[Al_The_Man]

Page 2 remove the jumper between 2 & 3.
Al.

[Karl_T]

Thanks Al, i should have seen that.

Say, how close to 20 do i need to be? here's this eBay offer:
http://cgi.ebay.com/IPC-Power-Resist...item3ef0b63fd9

Karl

[Al_The_Man]

At 22ohms should be close enough, you can even shorten one winding if you had to.
Al.

[usfwalden]

Did you get two of them? I was watching an auction of two of those drives on Ebay sometime back around when you made this posting but didn't bid. I was hoping to see the 2nd one go back on Ebay. I'm still looking for one.

Originally Posted by Karl_T I bought this drive on the bay: http://www.a-m-c.com/download/datasheet/b100a40ac.pdf It's for a 10 horse brushed DC spindle on a Matsuura bed mill using a Galil card and Camsoft refit. This thing will likely have over voltage issues slowing down. On page two of the manual above, and on the dirve itself, it looks like you can just use a resistor. I have no idea what size. AMC also shows these http://www.a-m-c.com/download/datasheet/srst.pdf Are these necessary for this use? Karl

[Al_The_Man]

The last lot I snagged were a lot of 3 for $200.00, I was the only bidder!
Al.

[usfwalden]

Want to sell one? I've got both a 10s and 20s and a pico fanuc encoder board already while I wait for a good deal on a drive to pop up on ebay. If I get a b100a40ac I aught to be able to go with the 20s (want to replace the ge pancake motor and varispeed on my spindle wizard excello with a servo).

I'm about to move so I'm in no rush but if I can get a deal I'll get it.

Originally Posted by Al_The_Man The last lot I snagged were a lot of 3 for $200.00, I was the only bidder! Al.

[Al_The_Man]

They all happen to have gone on projects.
I used a 5S with a B40A20 on the spindle on a 9x30 lathe that worked out OK, I replaced the encoder with a Renco in my case.
I have yet to try it out as a C axis, although it should be capable.
Al.

[usfwalden]

Do you know what control people are using with the s series drives? Not that I'm going to change controls now, I've just become curious after seeing big s series drives listed constantly.

[Al_The_Man]

They can be used by the likes of Galil. The down side is that each two sinusoidal outputs for one drive use up two axis output designations.
AFA the drive design, they are the simplest to make, minimum components.
Al.