Baldor (ABB) servo with resolver output, change to incremental?

[jets]

[FONT=&quot]Hi,[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]I have some Baldor (Baldor is now ABB) servo motors that have revolvers for position output. But to my surprise the Baldor MicroFlex e100 drive does not accept a resolver input. Another look at the literature confirms this as well as Mint Workbench. Here is the fine print I missed, not so fine now LOL:[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]“MicroFlex e100 accepts incremental encoder (with or without Halls), Halls-only, SSI, EnDat, SmartAbs or SinCos feedback.”[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]Is it possible to physically change the resolver out for say the incremental encoder? They do it at the factory so there has to be a way, a kit perhaps? [/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]I guess another question is what drive will accept the resolver input Baldor/ABB or others, that is still economical? [/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]I have searched the internet and there are Resolver to Digital output convertors maybe this is an option too.[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]Thanks, and look forward to your response. [/FONT]

 

[Jim3846]

Might be a reason for using resolver. Resolver will give you an output position all the time. To know the position during power loss, when it comes back up.

Maybe incremental encoder might not be an option here.

Just something to look into before deciding.

 

[Steve Bailey]

Isn't SinCos another way to say resolver?

 

[GaryS]

For just the motor and drive you could easily just switch to a incremental encoder
but other components the require a resolver input such as a motion controller or position controller
you need to look carefully at the whole system

 

[jets]

use of servo.

This servo will be used to control pitch of a screw on a lathe (carriage table movement).



If power is lost the operator could just move the carriage back to the desired position but it would be nice to maintain the position in memory, but not necessary.


Steve maybe your right but when I enter the model or spec in Mint Workbench it spits it out.



Should be a way to change the resolver. I might just end up making a plate to add an encoder but should be able to find a factory solution.

 

[Steve Bailey]

From the manual, the feedback connection is through the X8 connector. The pins on the connector carry different signals based on the feedback style. What I wasn't able to tell from the manual I looked at was whether you have to order a drive with the feedback style you want or whether you use the configuration software to make that selection.
It seems to me that a conversation with an ABB applications specialist is in order.

 

[jets]

Abb

True enough I will give it a go Tuesday, Monday is a holiday up here


BTW the drive lets you type in the servo spec or model then tells you what option is available. The e150 or e180 models have a slot for resolver cards. I think I am stuck changing the resolver on the servo, but we will see.

 

[Steve Bailey]

I did a little research and found that the output of a Sin Cos Encoder is Two DC sine waves 90 degrees apart. The output of a resolver is two AC sine waves 90 degrees apart. So I guess you can't use the resolver signal as feedback to the e100 drive.

 

[jdbrandt]

Isn't SinCos another way to say resolver?

SELSYN
SYNCRO

Yeah, old terms for plain and old fashioned simple positioning systems, from back in the simple days.

 

[Highland Controls]

You cannot put an encoder in a resolver motor without special equipment. The e150 had a resolver adapter, but I don't think the e100 did. I have run Baldor resolver motors with a KEB S6.

 

[Gene Bond]

The Control Techniques drives (M700, 750/DigitaxHD) will accept a resolver feedback. I've done several. The problem is getting the technical specs on the resolver. Excitation voltage, turns ratio, etc. But it's doable.

 

[Highland Controls]

10VAC RMS, 4.5kHz, 0.5 transformation ratio