#Number of cycles must be small otherwise generates a following error

start = -10.0
end = -5.0
acc_distance = 1.0

def before(position, scan):
    time.sleep(0.1)
        
def after(record, scan):
    global start, end
    if scan_y.position < start:
        record.invalidate()
    if scan_y.position > end:
        scan.abort()

#setup_plotting(line_plots = [mca_1])

scan_y.move(start - acc_distance)
scan_y.moveAsync(end + acc_distance)

mscan(trigger, [scan_y.readback, keith_1], 1000, timeout = None, before_read = before, after_read = after)