Brother TC-225 / TC-229 adventure!

the drives can be fussy about sequencing startup. drive control voltage, drive power voltage, control signals. if you get that wrong, even by 10ms, it might be complaining about undervoltage. as in, it checked for power voltage, and couldn't find any cause it wasnt "on" yet".

But you said it had been working before, so that throws this off a bit, unless you made some sort of change, or it was on a knife edge and just by fluke never complained before.

Appriciate for information!
It give me some "apparent" feeleing that I understand haw in works

Due to some magic (I believe due to temp. goes down for 3 deg.) this problem gone
But I install permanent tem and voltage monitor and ready.
Let You know if got any usfull info.

Thanks for Your support!

Unfortunately, I use the stock driver and sometimes I run into the UV issue as well. Inside the driver there is a voltage comparator and because of the lack of current I get this issue.
After a close verification of the power cables from the transformer to the driver I have found imperfect contacts, but I have also stumbled upon the situation that after a long time of voltage tracking there were succesive drops in voltage and the internal voltage comparator came through and did the right thing.
I have also noticed that your spindle does not brake right, why is that?
Looking forward to your answer!

Spindle doesn't not have a mechanical brake. No spindle does that i know of unless its for mill turn. it used huge 1kw resistors. Under power the spindle should start and stop from 6000rpm in 0.2 seconds. If the power fails it will coast.

Could you fellas with this information reach out to me? If email works better for you guys that would be awesome. I have a 1995 TC229 conversational only and I'd like to convert it so it can be more useable. I also don't want to spam this post for the information I am after. Thanks guys!

spam away, the info helps everyone here.
my machines will be sleeping for a little bit more. i get my new house tuesday, but i wont have a shop/garage with power built for a few more months.