Would any of you ladies mind telling me the brand of long arm machines you have that have the BSR on them?

only bernina machines can use a BSR. that stands for Bernina Stitch Regulator.

I have a Nolting with a stitch regulator. But it isn't called BSR

I have an APQS with a stitch regulator.

Gammill's have a stitch regulators also.

I have a Voyager with SLR (Stitch Length Regulator)but I started with a domestic sewing machine and learned how to regulate my own stitches & speed before I got the Voyager.

You do know that you can buy a gizmo called Quilter's Cruise Control for many, many different machines and frames? Also, the Grace Frame company has some kind of control for their frames and many different machines.

Bernina stitch regulator is a foot that attaches to your Bernina machine. A laser measures the movement of your fabric, and calculates the speed of the needle movement. It still requires a little practice to achieve outstanding results.

Gammill Long Arms use a system of two wheels that measure the movement of your machine. Those calculations control the needle movement. This system is more accurate and a little easier to master!

EIQuilter, I have a APQS Lenni with a stitch regulator, too. I'm just learning to quilt on it, tho. I do FMQ. I really do like it.
Windsong

Agree, love mine

i have an HQ-16 with stitch regulator---not the bernina one though---
was your question a specific to that brand???
what is your question about stitch regulators?