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Moveit motion planning VERY slow

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Hello, I made a custom arm with dynamixel motors that I managed to move it with moveit. However, after planning, when I execute the movement, all the intermediate points are very distant in time (roughly 7 seconds between each point). In the log below you can find an extract of the goal with 3 sample points respectively at time 0, 7 and 14s. I tried with another goal and I had 8.5 seconds between each intermediate points... From where this "lag" comes from? do you have an idea? Thank you very much in advance positions: [-0.2684466378799872, -1.1274758790959463, 1.030835089459151, 1.6183497312193513, -0.5108156023659185, -0.9065826456404139] velocities: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0] accelerations: [0.0004511662190817926, 0.0, 0.0, 0.0, 0.0, 0.0] effort: [] time_from_start: secs: 0 nsecs: 0 - positions: [-0.2562400395714328, -1.0762276932709398, 0.9839826590823839, 1.5447893388407326, -0.48759680001145106, -0.8653775109410078] velocities: [0.0016593982051817287, 0.006966817898581831, -0.006369246935989043, -0.01, 0.00315642720269342, 0.005601538187469333] accelerations: [3.5373454787627456e-19, -2.8298763830101965e-18, 2.59405335109268e-18, 0.0, -1.29702667554634e-18, -3.5373454787627456e-19] effort: [] time_from_start: secs: 7 nsecs: 356039237 - positions: [-0.2440334412628784, -1.0249795074459334, 0.9371302287056169, 1.4712289464621136, -0.4643779976569836, -0.8241723762416016] velocities: [0.0016593982051817287, 0.006966817898581831, -0.006369246935989043, -0.01, 0.00315642720269342, 0.005601538187469333] accelerations: [-3.5373454787627456e-19, 2.8298763830101965e-18, -2.59405335109268e-18, 0.0, 1.29702667554634e-18, 3.5373454787627456e-19] effort: [] time_from_start: secs: 14 nsecs: 712078475

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