Matching drives to old AC servos?

[jduke]

I have a dyna mechtronics dm4400m with the following motors that I would like to reuse, or replace with similar servos.

Any good source for ideal replacement drives at an economical price for the home hobbiest ?

X-Y axis
HA40CS
Rated Torque
30.0 kg/cm at stall (2687 oz.in.)
27.2 kg/cm at 1000 RPM
24.4 kg/cm at 2000 RPM
Max. RPM 2000
Weight 8 kg

Z axis
HA80CS
Rated Torque
60.0 kg/cm at stall (5375 oz.in.)
54.4 kg/cm at 1000 RPM
48.7 kg/cm at 2000 RPM
Max. RPM 2000
Weight 12kg

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[Al_The_Man]

Did you see this older post?
https://www.cnczone.com/forums/knee-...rum-posts.html

[jduke]

Did you see this older post?
https://www.cnczone.com/forums/knee-...rum-posts.html

Yes there are lots of posts about the 4400m I have gone through that and several others to gather as much information about it as possible to see what I could make fit.
They talk about granite drivers but I’m not seeing any success recently with driving the original motors.

Thanks for the link

Duke

[joeavaerage]

Hi,
unless you're 100% familiar with servos with their associated encoders and/or resolvers sounds like a good recipe for spending lots of money
buying new drives for your existing servos only to find they do not match each other as well as you hoped.

If you are new to AC servos do yourself a favor and buy a matched pair, that is the servo AND the drive. Delta (Taiwanese brand made in China) and
DMM (Canadian brand made in China) are two good quality brands that perform well, are well supported at reasonable prices.

Craig

[jduke]

Hi,
unless you're 100% familiar with servos with their associated encoders and/or resolvers sounds like a good recipe for spending lots of money
buying new drives for your existing servos only to find they do not match each other as well as you hoped.

If you are new to AC servos do yourself a favor and buy a matched pair, that is the servo AND the drive. Delta (Taiwanese brand made in China) and
DMM (Canadian brand made in China) are two good quality brands that perform well, are well supported at reasonable prices.

Craig

I am a lot more comfortable using steppers than servos of any flavor.

But as I understand a mill the size of the dm4400 runs best with servos so should I embark on learning servos, or could I get a big enough set of closed loop steppers to get pretty good performance out of this thing?

Thanks
Duke