Warp-grinder rules question

[gronnelg]

When the grinder and the unit accompanying it are set up

"Then roll a dice for this model and any unit that joined it. On a 1 or 2, that unit suffers D6 mortal wounds."

So do I roll a d6 for the grinder, and then a d6 for the accompanying unit?

[Isotop]

59 minutes ago, gronnelg said:

When the grinder and the unit accompanying it are set up

"Then roll a dice for this model and any unit that joined it. On a 1 or 2, that unit suffers D6 mortal wounds."

So do I roll a d6 for the grinder, and then a d6 for the accompanying unit?

I would say you roll for each unit individualy, since the last part of the rule talks about "that" unit. I am not a native english speaker, but I think this word refers to a singular thing, does it not?