Vibration During Axis Acceleration change

[HammerM0N]

Hi,
Have any one encountered Nema34 (1600oz) crazy vibrations issues ?
This is driving me crazy for a while
And I can't set up the Steps per mm correct



* Adding a You Tube video :

That's the smoothest I could get ( meanwhile )

Brakout via Arduino GRBL ( v - 1.1f )

Motors - 85BYGH450C-012B
Drivers - DQ860MA set to
X32 as recommended ( from Wanti Motors support )
3.5A Peak and 2.05A Rated


Cables all are shielded outside & Inside the control box

GRBL Settings :
/* ============================================== */

$0 = 10 (Step pulse time, microseconds)
$1 = 25 (Step idle delay, milliseconds)
$2 = 0 (Step pulse invert, mask)
$3 = 3 (Step direction invert, mask)
$4 = 0 (Invert step enable pin, boolean)
$5 = 0 (Invert limit pins, boolean)
$6 = 0 (Invert probe pin, boolean)
$10 = 1 (Status report options, mask)
$11 = 0.010 (Junction deviation, millimeters)
$12 = 0.002 (Arc tolerance, millimeters)
$13 = 0 (Report in inches, boolean)
$20 = 0 (Soft limits enable, boolean)
$21 = 0 (Hard limits enable, boolean)
$22 = 0 (Homing cycle enable, boolean)
$23 = 0 (Homing direction invert, mask)
$24 = 25.000 (Homing locate feed rate, mm/min)
$25 = 500.000 (Homing search seek rate, mm/min)
$26 = 250 (Homing switch debounce delay, milliseconds)
$27 = 1.000 (Homing switch pull-off distance, millimeters)
$30 = 1000 (Maximum spindle speed, RPM)
$31 = 0 (Minimum spindle speed, RPM)
$32 = 0 (Laser-mode enable, boolean)

*** should be 1280 all but the X and Y Axis have a bit offset so I changed it a bit ( although still didn't help )
$100 = 1270.800 (X-axis travel resolution, step/mm)
$101 = 1271.000 (Y-axis travel resolution, step/mm)
$102 = 1280.000 (Z-axis travel resolution, step/mm)

$110 = 1000.000 (X-axis maximum rate, mm/min)
$111 = 1000.000 (Y-axis maximum rate, mm/min)
$112 = 1000.000 (Z-axis maximum rate, mm/min)
$120 = 10.000 (X-axis acceleration, mm/sec^2)
$121 = 10.000 (Y-axis acceleration, mm/sec^2)
$122 = 10.000 (Z-axis acceleration, mm/sec^2)
$130 = 780.000 (X-axis maximum travel, millimeters)
$131 = 880.000 (Y-axis maximum travel, millimeters)
$132 = 180.000 (Z-axis maximum travel, millimeters)

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[ger21]

Sounds like resonance problems. Large motors like that are very susceptible to resonance.

You'd have been much better off with motors 1/4 the size.

[HammerM0N]

Sounds like resonance problems. Large motors like that are very susceptible to resonance.

You'd have been much better off with motors 1/4 the size.

Thank for the response !
can you please explain what that means ?
regarding the smaller motors I agree ( I understand it now ) , but I already have these and I really don't want to spend again on motors ...
is it possible that the Arduino and GRBL are not "powerful enough" ?