Add Phytron 52.200.5

[cdn-lnk]

Hejsan @anderssandstrom , @kivel

Another motor from Phytron. =)
This one is an older model, it is not available on the manufacture website anymore, I am including an older manual for reference.

Cryo motoren Morskate.pdf

hopefully this time I won't have to fix all the headers, comments and values. 😅

[cdn-lnk]

Hi @kivel ,
sorry for taking so long to reply.

I agree, but I've got 2 question then.

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First question

50% of 5 amps is still higher than the EL7037 max (1.5 A) limit.
Which of the following options would be better:

1. 50% of 1.5A
2. 1.5A
3. Different values for EL7037 (1.5A or 750mA?) and EL704x (2.5A)

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Second question

I noticed a few other motors may fall in a similar situation (IMO).

Per @anderssandstrom request I am writing a patch to use macros for the max current.
Since I am already on it, would you guys like me to add macros for the reduced current and change the default reduced current to 50% of the max current?

This way we would have consistent/predictable behavior for the motors but it may break backwards compatibility.

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FYI: @javicereijo and @mac-kan

*** If the answer for the second question is yes, I will use the strategy chosen on question 1.

[kivel]

As to Q1: Is it prudent to use the underpowered EL7037 for such a large motor in the first place? In this special case, I'd use whatever holding current you guys figured out works with the motor.
As to Q2: Somehow I fail to see the use case for a MACRO. If one needs to deliberately set the drive to a lower current. I prefer to do so with the explicit call to the EcAddSdo command. This makes the intention 100% clear in the startup.iocsh. As the MACRO still allows for this, I'm fine with a MACRO for the max current. It must have the nominal current as a default value though.
Same goes for the reduced current.

Annex: if there is a motion for fully customized motor configs with macros. Wouldn't it make more sense to create a generic config for 70x7 and 70x1 drives? One that has MACROs for everything?

[kivel]

@cdn-lnk
Is there any progress in this PR? I'd rather handle the MACRO related tasks in a separate issue, than have it in a PR.

[cdn-lnk]

Hi @kivel ,

I will need some time before I can work on this.
Can we keep it on hold for a while?