Documentation not clear what are HV and VBB

[grimlokason]

Hello,

I think that HV = high voltage and VBB = ? But shouldn't it be stated that it's Voltage from the HV-in pin or voltage from the card ?

( and for example, we can use a 24V for the mainboard, and a 2nd one dedicated to the driver ^^' )

[maxkreja]

• HV equals any voltage you supply to HV IN
• VBB equals any (as long as it's enough to power the board) voltage you supply to DCIN

You can choose which voltage is supplied to the stepper drivers by placing jumpers between two of the three pins between the driver socket and motor connector.

You have the following options:

• supply 24V to DCIN and nothing to HV IN:
  • VBB will be at 24V
  • HV will not have any voltage at all
• supply 12V to DCIN and nothing to HV IN:
  • VBB will be at 12V
  • HV will not have any voltage at all
• supply 24V to DCIN and 24V to HV IN:
  • VBB will be at 24V
  • HV will be at 24V too, but not drawing from DCIN
• supply 24V to DCIN and 48V to HV IN:
  • VBB will be at 24V
  • HV will be at 48V

This give you the option to use multiple power supplies to power the board and the motors. Or you can split the power between different rails on a single power supply (feed system from one rail, feed motors from other rail). And if you have steppers that require a different voltage than you want to supply to DCIN, for example if you wish to use 48V steppers, you can do that too.

[Cisien]

It would be great if the manual were updated to call out the voltage ranges and to list out that matrix that @maxkreja listed above.

The behavior described was exactly what i suspected, but that's what usually leads to the release of the magic smoke in my case :D

[grimlokason]

Same here, and because i already had a octopus Pro. But other users are not always familiar with it and i saw other request about it on Facebook.