New Machine Build- CMC Motor 3515 series

[CNC Bill]

Hi, I have 2 older servo drives out of an old plotter. Model MT 3151-018EJ. I'm leaning towards the Gecko Drives but I can't find what type of Encoders I have. I have been to CMCs site and downloaded their PDF on the 3500 series with no luck. I do know that the encoder wheel has 21 windings, with 2 poles at 180d, and is blue, LOL, with a second wheel thats a half step off but no poles, if that helps. Also, since I only have 2 was thinking for X,Y axis and how important is it to get a matching drive for the Z axis. Looking foward to any advice. Thank You.

[Al_The_Man]

Originally Posted by CNC Bill I do know that the encoder wheel has 21 windings, with 2 poles at 180d, and is blue,

???
Can you post a picture of the motor at least?
Al.

[CNC Bill]

Thanks for fast reply, let me know if you need anything else.
Attachment 91504

Attachment 91505

[CNC Bill]

Well it worked in the preview. lol What is the best way to post pics?

[Al_The_Man]

"Manage Attachments" but they need to be under 500kb.
Irfanview is good for resizing.
Al.

[CNC Bill]

I feel so like a noob, lol

[Al_The_Man]

That end you have exposed is the DC Tach.
I have most of the info on these motors, If I come across it I will post tomorrow.
They are fairly decent motors, but the tach is seldom used now on modern drives.
Al.

[Al_The_Man]

OK 3515
Constant Torque Tc = 6.44Lb-in
315 watts
There are several different back EMF versions of the 3515, so you would need to apply a known DC voltage and measure the rpm to obtain the Volts/Krpm.
They are usually rated up to 3000rpm.
Al.

[CNC Bill]

Ok, will the DC Tach work as an encoder or will I have to add (renco) one? I have 2 small encoders that came of the same E sized Zeta plotter, would the work? This will be the base of my machine, giving me 30" x 15" of travel min.

Al, I really appreciate your time, Thank You

[Al_The_Man]

The tach is not much use as a positional device, you will need an encoder.
If you can mount the encoders on and they are suitable resolution they should work.
Al.

[CNC Bill]

Al, I got another guestion(s).
I just bought another servo, EG&G ME-5370-119C1, its bigger than my other motors, but I can't seem to find out what the Max VDC and Amps are and what the motors torque is? Is their a site for older legacy motors that give specs?

Also, this motor has an encoder e.g., does this mean that for EG&G that ME = Motor + encoder and MT= Motor + Tach. Thank You

[Al_The_Man]

I don't have anything on the 5300 series, most of these EG&G motors were CMC relabelled.
You may have to obtain the specs empirically.
I have a previous post here on obtaining it.
The ME is most likely the encoder option.
I should have the pin out for the standard encoder if needed.
Al.