DMM Servos

[Ger21]

Their DYN2 drives are 60V DC, while their DYN4 drives are 200V AC.

I'm using their DYN4 with 400w servos on the router I'm building.
I orderd one and set it up on my test rig, and promptly blew the drive when I powered it.
I sent it to DMM and they repaired it for free, saying it blew from over voltage.
My voltage was about 245V, which falls within their specs. They sent me a tech bulletin stating to use a line reactor to smooth out the voltage. Before I test it again, I'll be getting a transformer to lower the voltage a bit.

The reason I went with the DMM is because they have good support, and are about $100/set cheaper than the cheap chinese models on Ebay and AliExpress.

[Chaz]

Their DYN2 drives are 60V DC, while their DYN4 drives are 200V AC.

I'm using their DYN4 with 400w servos on the router I'm building.
I orderd one and set it up on my test rig, and promptly blew the drive when I powered it.
I sent it to DMM and they repaired it for free, saying it blew from over voltage.
My voltage was about 245V, which falls within their specs. They sent me a tech bulletin stating to use a line reactor to smooth out the voltage. Before I test it again, I'll be getting a transformer to lower the voltage a bit.

The reason I went with the DMM is because they have good support, and are about $100/set cheaper than the cheap chinese models on Ebay and AliExpress.

Thanks. Most that are testing / using them are very happy. The software looks clean and functional too, certainly a strong contender for 'decent' servo stuff at hobby level. I bought Panasonic before for Thor however it was expensive and that was at 2nd hand / discount rates. I'd not have considered the Panasonic stuff at list prices.

[JAZZCNC]

The reason I went with the DMM is because they have good support, and are about $100/set cheaper than the cheap chinese models on Ebay and AliExpress.

Think you got that wrong way round Gerry.? DYN4 Drive & 750W Motor on DMM online shop shows $457 and not sure if that includes Servo cables.
Where Lichuan 750W motor and Drive with 3Mtr cable set is $312

[Ger21]

Shipping always pushed the chinese price up higher.
But I just looked, and see the Lichuan 400w for $350, including 10m cables. That is a good price.
I need to buy 2 more, so I may look at those.

[m_c]

The quote I got from DMM came to about $2200, but that was in 2012.
That was for three 750W servos with DYN3 drives, all the required cables, and carriage to the UK.

What I will say though, is if you're upgrading a stepper system, the fact DMM do NEMA23/34 size motors, would make me consider those sizes to avoid having to rework brackets.