docs: Updated the docs to the latest shaper changes and fixed typos

Signed-off-by: Dmitry Butyugin <dmbutyugin@google.com>

docs/Config_Reference.md

@@ -1955,11 +1955,10 @@ section of the measuring resonances guide for more information on
 #   are reachable by the toolhead.
 #accel_chip:
 #   A name of the accelerometer chip to use for measurements. If
-#   adxl345 chip was defined without an explicit name, this parameter
-#   can simply reference it as "accel_chip: adxl345", otherwise an
-#   explicit name must be supplied as well, e.g. "accel_chip: adxl345
-#   my_chip_name". Either this, or the next two parameters must be
-#   set.
+#   an accelerometer was defined without an explicit name, this parameter
+#   can simply reference it by type, e.g. "accel_chip: adxl345", otherwise
+#   a full name must be supplied, e.g. "accel_chip: adxl345 my_chip_name".
+#   Either this, or the next two parameters must be set.
 #accel_chip_x:
 #accel_chip_y:
 #   Names of the accelerometer chips to use for measurements for each
@@ -1978,16 +1977,15 @@ section of the measuring resonances guide for more information on
 #   during the calibration. The default is 50.
 #min_freq: 5
 #   Minimum frequency to test for resonances. The default is 5 Hz.
-#max_freq: 133.33
-#   Maximum frequency to test for resonances. The default is 133.33 Hz.
+#max_freq: 135
+#   Maximum frequency to test for resonances. The default is 135 Hz.
 #accel_per_hz: 60
 #   This parameter is used to determine which acceleration to use to
 #   test a specific frequency: accel = accel_per_hz * freq. Higher the
 #   value, the higher is the energy of the oscillations. Can be set to
 #   a lower than the default value if the resonances get too strong on
-#   the printer. However, lower values make measurements of
-#   high-frequency resonances less precise. The default value is 75
-#   (mm/sec).
+#   the printer. However, lower values make measurements of high-frequency
+#   resonances less precise. The default value is 60 (mm/sec).
 #hz_per_sec: 1
 #   Determines the speed of the test. When testing all frequencies in
 #   range [min_freq, max_freq], each second the frequency increases by

docs/Resonance_Compensation.md

@@ -469,8 +469,8 @@ parameters of each shaper.
 | MZV | 0.75 / shaper_freq | ± 4% shaper_freq | -10%...+15% shaper_freq |
 | ZVD | 1 / shaper_freq | ± 15% shaper_freq | ± 22% shaper_freq |
 | EI | 1 / shaper_freq | ± 20% shaper_freq | ± 25% shaper_freq |
-| 2HUMP_EI | 1.5 / shaper_freq | ± 35% shaper_freq | ± 40 shaper_freq |
-| 3HUMP_EI | 2 / shaper_freq | -45...+50% shaper_freq | -50%...+55% shaper_freq |
+| 2HUMP_EI | 1.5 / shaper_freq | -40...+45% shaper_freq | -45..+50% shaper_freq |
+| 3HUMP_EI | 2 / shaper_freq | -50...+60% shaper_freq | -55%...+65% shaper_freq |
 
 A note on vibration reduction: the values in the table above are approximate.
 If the damping ratio of the printer is known for each axis, the shaper can be
@@ -502,11 +502,11 @@ so the values for 10% vibration tolerance are provided only for the reference.
  resonances at 35 Hz and 60 Hz on the same axis: a) EI shaper needs to have
  shaper_freq = 35 / (1 - 0.2) = 43.75 Hz, and it will reduce resonances
  until 43.75 * (1 + 0.2) = 52.5 Hz, so it is not sufficient; b) 2HUMP_EI
- shaper needs to have shaper_freq = 35 / (1 - 0.35) = 53.85 Hz and will
- reduce vibrations until 53.85 * (1 + 0.35) = 72.7 Hz - so this is an
+ shaper needs to have shaper_freq = 35 / (1 - 0.4) = 58.3 Hz and will
+ reduce vibrations until 58.3 * (1 + 0.45) = 84.5 Hz - so this is an
  acceptable configuration. Always try to use as high shaper_freq as possible
  for a given shaper (perhaps with some safety margin, so in this example
- shaper_freq ≈ 50-52 Hz would work best), and try to use a shaper with as
+ shaper_freq ≈ 55 Hz would work best), and try to use a shaper with as
  small shaper duration as possible.
 * If one needs to reduce vibrations at several very different frequencies
  (say, 30 Hz and 100 Hz), they may see that the table above does not provide

scripts/calibrate_shaper.py

@@ -166,7 +166,7 @@ def main():
                     default=None, help="shaper damping_ratio parameter")
     opts.add_option("--test_damping_ratios", type="string",
                     dest="test_damping_ratios", default=None,
-                    help="a comma-separated liat of damping ratios to test " +
+                    help="a comma-separated list of damping ratios to test " +
                     "input shaper for")
     options, args = opts.parse_args()
     if len(args) < 1: