I have looked at AMC, Viper 200, and Gecko G320X. 

AMC is way out of my price range for their recommended driver.  ($831 each)

Viper looks good, but Larken is slow to answer questions sometimes, and its still kinda pricey at $229 each. 

Gecko looks good, but the voltage range is marginally close, and Gecko says I would need to build my own protective dump circuit for my application.  Marcus is extremely responsive to questions, and the price is half that of the Viper. 

Who else has a step direction servo driver that I should look at? 

I am working on the retrofit of an old Hurco KMB1 to Mach control.  Anybody need the old servo drivers, control, memory boards etc?  Pretty much all I am saving on the control side is the transformers and the VFD.  Eventually not even the VFD. 

I'm pretty much decided on the US Digital E6-1000 encoders to replace the low res (and falling apart) original encoders. 

Thanks,
Bob

www.cncdrives.com  have the Whale and Dugong drives, never used them myself but have only heard good from people that have them.
Hood

Looks the pond might be in the way for these guys. 

They have aeroplanes nowadays

Seriously though I believe delivery is quick enough but if you are a buy American only guy then your choice is Geckos only I think.

Hood

Bob,

Note that we are carrying the dugongs here: http://www.cnc4pc.com/Store/osc/index.php?cPath=62_64

Arturo Duncan
http://cnc4pc.com

They have aeroplanes nowadays

Seriously though I believe delivery is quick enough but if you are a buy American only guy then your choice is Geckos only I think.

Hood

Not particularly.  I do try to give local companies first crack at my business, but its mainly that it can be entertaining sometimes to get international deliveries.  Customs, carriers etc. 

Bob,

Note that we are carrying the dugongs here: http://www.cnc4pc.com/Store/osc/index.php?cPath=62_64

Arturo Duncan
http://cnc4pc.com

Yep, thanks.  I found your site last night when I did a search. 

I do try to give local companies first crack at my business,

Me too but unfortunately there are not many around here
Hood