time ticks overlap

by andig2

HTML

<script src="http://www.chartjs.org/dist/master/Chart.bundle.min.js"></script>
<canvas id="canvas" width="400" height="200"></canvas>

JavaScript

window.randomScalingFactor = function() {
  return (Math.random() > 0.5 ? 1.0 : -1.0) * Math.round(Math.random() * 100);
};
var canvas = document.getElementById('canvas');
var chart = new Chart(canvas, {
  "type": "bar",
  "data": {
    "datasets": [{
      "type": "line",
      "label": "ModulationTempDesired",
      "backgroundColor": "#90a4ae",
      "borderColor": "#90a4ae",
      "yAxisID": "axis4",
      "xAxisID": "axis-time",
      "borderWidth": 1,
      "fill": false,
      "pointRadius": 0,
      "steppedLine": "before",
      "data": [{
        "x": 1483311543649,
        "y": 29.868
      }, {
        "x": 1483397943562,
        "y": 29.043
      }, {
        "x": 1483484343475,
        "y": 25.89
      }, {
        "x": 1483570743765,
        "y": 28.174
      }, {
        "x": 1483657143498,
        "y": 31.129
      }, {
        "x": 1483743543729,
        "y": 30.287
      }, {
        "x": 1483829943467,
        "y": 33.369
      }, {
        "x": 1483916343608,
        "y": 27.449
      }, {
        "x": 1484002743771,
        "y": 25.549
      }, {
        "x": 1484089143297,
        "y": 28.814
      }, {
        "x": 1484175543604,
        "y": 27.798
      }, {
        "x": 1484261943313,
        "y": 25.945
      }, {
        "x": 1484348343953,
        "y": 27.772
      }, {
        "x": 1484434743683,
        "y": 27.781
      }, {
        "x": 1484521143825,
        "y": 28.508
      }, {
        "x": 1484607543560,
        "y": 27.786
      }, {
        "x": 1484693943648,
        "y": 28.965
      }, {
        "x": 1484780343511,
        "y": 29.504
      }, {
        "x": 1484866743497,
        "y": 25.87
      }, {
        "x": 1484953143494,
        "y": 25.093
      }, {
        "x": 1485039543661,
        "y": 25.632
      }, {
        "x": 1485125943773,
        "y": 30.804
      }, {
        "x": 1485212343782,
        "y": 28.623
      }, {
        "x": 1485298743741,
        "y": 27.359
      }, {
        "x": 1485385143545,
...