search

clough42 / electronic-leadscrew

Lathe electronic leadscrew controller
MIT License
323 stars 117 forks source link

36 vs 48 volt power supply? #248

Closed javaduke closed 1 year ago

javaduke commented 1 year ago

I'm a bit confused, I ordered the servo that James suggested, and it says 24-36 Volt, but the power supply is 48 volt - so is it ok to power the servo with 48 volt instead of 36, or should I get the 36 volt power supply?

tomvikse commented 1 year ago

48V no problem.. https://youtu.be/clgpZJFoqIQ?list=PLDlWKv7KIIr90ZZ7Zqt-ge5nVVdS3WVgg&t=150

javaduke commented 1 year ago

OK, thanks, hopefully it won't burn down :) It is confusing though, the product description on StepperOnline says 20-50VDC, the label on the integrated controller says 24-36V and the power supply is 48V...

johnsonm commented 1 year ago

I note that James had his first servo die, and 48V is close to the rated maximum; that's not a lot of headroom for transients, say from back-EMF. The servo's rated torque is at 36V, so it's not crazy to run it on 36V, with more headroom.

I will be running my servo at 36V for this reason, and if I swap out for 48V due to insufficient torque, I'll plan either to adjust the nominal 48V supply a few volts lower, or to add transient protection; at least a large-value capacitor, and maybe a crowbar shunt to avoid exceeding 49V. But I don't expect that to be necessary.

tomvikse commented 1 year ago

Using a 48v power supply adjusted down to 42v.. good for 2 years now..