I misread the question, you can do this, I know someone who trains like this with chinups because they maxed out the pulldown machine.
You just do rest pause sets of 1 rep, say 8-15 total reps, but follow it up with a dropset if you can. Then eventually add in doubles(1 set of 2 rep) as the 2nd set, then as the 3rd set. Once you have reached your target reps with sets of 2, repeat the process increasing the 2nd set to 3 reps, then 3rd set to 3 reps etc.
The 1st set will always be the hardest and because of this sets of 1RM arnt a good way to build strength, you should aim for doubles as a minimum, and its not a good way to always train, you should add in higher reps 1-2 times a week or every workout.