VEX Robotics Motor Data - 775pro (217-4347)


The 775pro motor was designed in collaboration with West Coast Products specifically for high speed applications such as intakes, conveyors and shooter wheels. It packs the power of a CIM Motor into a small and lightweight package and pairs perfectly with the VersaPlanetary Gearbox!

  Published Specification Experimental Data
Free Speed (RPM) 18700 (+/- 10%) 18730
Free Current (A) 0.7 0.7
Maximum Power (W) 347 347
Stall Torque (N · m) 0.71 0.71
Stall Current (A) 134 134
The "Down-Up" Test: Why VEX provides the most accurate motor data possible

Learn more about using DC motors and motor curves to design robots





 

VEX Robotics Motor Data - 775pro (217-4347)

 
 

The 775pro motor was designed in collaboration with West Coast Products specifically for high speed applications such as intakes, conveyors and shooter wheels. It packs the power of a CIM Motor into a small and lightweight package and pairs perfectly with the VersaPlanetary Gearbox!

 
  Published Specification Experimental Data
Free Speed (RPM) 18700 (+/- 10%) 18730
Free Current (A) 0.7 0.7
Maximum Power (W) 347 347
Stall Torque (N · m) 0.71 0.71
Stall Current (A) 134 134
 
 

The "Down-Up" Dyno Test

VEX Robotics motor curves were developed experimentally using a “down-up” dyno test.

1. A motor is spun at free speed
2. A brake is slowly applied (linearly increasing in torque over time), bringing the motor down to a predetermined RPM
3. The brake is slowly released and the motor is allowed to return to its free speed

A variety of data, such as output speed, output torque, current draw, and power input/output, is taken throughout this test. The “down” (brake applied) side is then averaged with the “up” (brake released) side.

Why "Down-Up"?

The mechanics of a dyno test are crucial to developing and publishing accurate motor specifications. When a motor is spinning at free speed while attached to a dyno drum, the system contains a high amount of rotational inertia. This inertia complements the motor’s own output, creating a false reading for peak output power that can be higher than the motor’s actual performance.

However, manufacturers do not always adjust for inertia cancellation when measuring their motor’s performance, and spec sheets rarely detail the circumstances under which their information was derived.

By testing and averaging both the “down” (inertia helping the motor) and “up” (inertia resisting the motor) sides, this method is the best way to represent a motor’s true capacity.

Click to Expand Motor Curve Data

Click to download motor curve data (.CSV)

Speed (RPM)
Torque (N·m)
Current (A)
Supplied Power (W)
Output Power (W)
Efficiency (%)
Power Dissipation (W)
0
0.708
133.613
1603.356
0
0
1603.356
187.34
0.70092
132.284
1587.408
13.751
0.866
1573.657
374.681
0.69384
130.955
1571.46
27.224
1.732
1544.236
562.021
0.68676
129.626
1555.512
40.419
2.598
1515.093
749.362
0.67968
128.296
1539.552
53.337
3.464
1486.215
936.702
0.6726
126.967
1523.604
65.976
4.33
1457.628
1124.043
0.66552
125.638
1507.656
78.338
5.196
1429.318
1311.383
0.65844
124.309
1491.708
90.422
6.062
1401.286
1498.724
0.65136
122.98
1475.76
102.228
6.927
1373.532
1686.064
0.64428
121.651
1459.812
113.757
7.793
1346.055
1873.405
0.6372
120.322
1443.864
125.007
8.658
1318.857
2060.745
0.63012
118.992
1427.904
135.98
9.523
1291.924
2248.086
0.62304
117.663
1411.956
146.675
10.388
1265.281
2435.426
0.61596
116.334
1396.008
157.093
11.253
1238.915
2622.767
0.60888
115.005
1380.06
167.232
12.118
1212.828
2810.107
0.6018
113.676
1364.112
177.094
12.982
1187.018
2997.448
0.59472
112.347
1348.164
186.678
13.847
1161.486
3184.788
0.58764
111.018
1332.216
195.984
14.711
1136.232
3372.129
0.58056
109.688
1316.256
205.012
15.575
1111.244

Speed (RPM)
Torque (N·m)
Current (A)
Supplied Power (W)
Output Power (W)
Efficiency (%)
Power Dissipation (W)
3559.469
0.57348
108.359
1300.308
213.763
16.439
1086.545
3746.81
0.5664
107.03
1284.36
222.236
17.303
1062.124
3934.15
0.55932
105.701
1268.412
230.43
18.167
1037.982
4121.491
0.55224
104.372
1252.464
238.348
19.03
1014.116
4308.831
0.54516
103.043
1236.516
245.987
19.894
990.529
4496.172
0.53808
101.714
1220.568
253.349
20.757
967.219
4683.512
0.531
100.385
1204.62
260.432
21.619
944.188
4870.853
0.52392
99.055
1188.66
267.238
22.482
921.422
5058.193
0.51684
97.726
1172.712
273.766
23.345
898.946
5245.534
0.50976
96.397
1156.764
280.017
24.207
876.747
5432.874
0.50268
95.068
1140.816
285.989
25.069
854.827
5620.215
0.4956
93.739
1124.868
291.684
25.931
833.184
5807.555
0.48852
92.41
1108.92
297.101
26.792
811.819
5994.896
0.48144
91.081
1092.972
302.24
27.653
790.732
6182.236
0.47436
89.751
1077.012
307.102
28.514
769.91
6369.577
0.46728
88.422
1061.064
311.685
29.375
749.379
6556.917
0.4602
87.093
1045.116
315.991
30.235
729.125
6744.258
0.45312
85.764
1029.168
320.019
31.095
709.149
6931.598
0.44604
84.435
1013.22
323.769
31.954
689.451
7118.939
0.43896
83.106
997.272
327.242
32.814
670.03
7306.279
0.43188
81.777
981.324
330.436
33.672
650.888
7493.62
0.4248
80.447
965.364
333.353
34.531
632.011
7680.96
0.41772
79.118
949.416
335.992
35.389
613.424
7868.301
0.41064
77.789
933.468
338.354
36.247
595.114
8055.641
0.40356
76.46
917.52
340.437
37.104
577.083
8242.982
0.39648
75.131
901.572
342.243
37.961
559.329
8430.322
0.3894
73.802
885.624
343.771
38.817
541.853
8617.663
0.38232
72.473
869.676
345.021
39.672
524.655
8805.003
0.37524
71.143
853.716
345.993
40.528
507.723
8992.344
0.36816
69.814
837.768
346.687
41.382
491.081
9179.684
0.36108
68.485
821.82
347.104
42.236
474.716
9367.025
0.354
67.156
805.872
347.243
43.089
458.629
9554.365
0.34692
65.827
789.924
347.104
43.941
442.82
9741.705
0.33984
64.498
773.976
346.687
44.793
427.289
9929.046
0.33276
63.169
758.028
345.993
45.644
412.035
10116.386
0.32568
61.839
742.068
345.021
46.495
397.047
10303.727
0.3186
60.51
726.12
343.771
47.344
382.349
10491.067
0.31152
59.181
710.172
342.243
48.192
367.929
10678.408
0.30444
57.852
694.224
340.437
49.038
353.787

Speed (RPM)
Torque (N·m)
Current (A)
Supplied Power (W)
Output Power (W)
Efficiency (%)
Power Dissipation (W)
10865.748
0.29736
56.523
678.276
338.354
49.884
339.922
11053.089
0.29028
55.194
662.328
335.992
50.729
326.336
11240.429
0.2832
53.865
646.38
333.353
51.572
313.027
11427.77
0.27612
52.535
630.42
330.436
52.415
299.984
11615.11
0.26904
51.206
614.472
327.242
53.256
287.23
11802.451
0.26196
49.877
598.524
323.769
54.095
274.755
11989.791
0.25488
48.548
582.576
320.019
54.932
262.557
12177.132
0.2478
47.219
566.628
315.991
55.767
250.637
12364.472
0.24072
45.89
550.68
311.685
56.6
238.995
12551.813
0.23364
44.561
534.732
307.102
57.431
227.63
12739.153
0.22656
43.231
518.772
302.24
58.261
216.532
12926.494
0.21948
41.902
502.824
297.101
59.086
205.723
13113.834
0.2124
40.573
486.876
291.684
59.909
195.192
13301.175
0.20532
39.244
470.928
285.989
60.729
184.939
13488.515
0.19824
37.915
454.98
280.017
61.545
174.963
13675.856
0.19116
36.586
439.032
273.766
62.357
165.266
13863.196
0.18408
35.257
423.084
267.238
63.164
155.846
14050.537
0.177
33.928
407.136
260.432
63.967
146.704
14237.877
0.16992
32.598
391.176
253.349
64.766
137.827
14425.218
0.16284
31.269
375.228
245.987
65.557
129.241
14612.558
0.15576
29.94
359.28
238.348
66.34
120.932
14799.899
0.14868
28.611
343.332
230.43
67.116
112.902
14987.239
0.1416
27.282
327.384
222.236
67.882
105.148
15174.58
0.13452
25.953
311.436
213.763
68.638
97.673
15361.92
0.12744
24.624
295.488
205.012
69.381
90.476
15549.261
0.12036
23.294
279.528
195.984
70.112
83.544
15736.601
0.11328
21.965
263.58
186.678
70.824
76.902
15923.942
0.1062
20.636
247.632
177.094
71.515
70.538
16111.282
0.09912
19.307
231.684
167.232
72.181
64.452
16298.623
0.09204
17.978
215.736
157.093
72.817
58.643
16485.963
0.08496
16.649
199.788
146.675
73.415
53.113
16673.304
0.07788
15.32
183.84
135.98
73.966
47.86
16860.644
0.0708
13.99
167.88
125.007
74.462
42.873
17047.985
0.06372
12.661
151.932
113.757
74.874
38.175
17235.325
0.05664
11.332
135.984
102.228
75.176
33.756
17422.666
0.04956
10.003
120.036
90.422
75.329
29.614
17610.006
0.04248
8.674
104.088
78.338
75.261
25.75
17797.347
0.0354
7.345
88.14
65.976
74.854
22.164
17984.687
0.02832
6.016
72.192
53.337
73.882
18.855

Speed (RPM)
Torque (N·m)
Current (A)
Supplied Power (W)
Output Power (W)
Efficiency (%)
Power Dissipation (W)
18172.028
0.02124
4.686
56.232
40.419
71.879
15.813
18359.368
0.01416
3.357
40.284
27.224
67.58
13.06
18546.709
0.00708
2.028
24.336
13.751
56.505
10.585
18734.049
0
0.699
8.388
0
0
8.388

Click to Collapse Motor Curve Data

Click to Expand 3 Minute Peak Power Test Data

Click to download peak power test data (.CSV)

Time (s)
Current (A)
Power Out (W)
0
83.23
374.025
0.366
81.84
370.786
0.769
81.76
365.003
1.173
80.54
359.48
1.552
78.87
353.183
1.935
76.79
350.17
2.312
75.89
346.329
2.662
75.46
343.624
3.008
74.15
338.585
3.36
73.62
337.315
3.736
73.22
332.655

Time
Current (A)
Power Out (W)
4.085
72.27
330.423
4.434
71.33
329.69
4.782
71.21
327.912
5.132
70.75
327.371
5.49
70.33
325.591
5.847
69.12
323.355
6.206
69.22
320.728
6.557
68.62
318.512
6.958
67.6
314.731
7.307
66.79
309.884
7.656
65.43
307.163
8.007
64.99
304.915
8.383
64.29
303.244
8.731
63.79
303.566
9.082
63.56
296.495
9.429
62.63
292.702
9.779
61.62
290.076
10.128
61.24
282.945
10.505
59.66
276.338
10.855
57.72
264.085
11.24
55.41
247.262
11.622
52.82
234.105
11.981
47.25
207.43
12.331
43.47
205.56
12.707
41.04
190.745
13.056
39.82
210.064
13.406
40.76
200.818
13.755
42.51
200.77
14.142
43.02
209.424
14.496
42.87
214.784
14.856
42.7
217.899
15.206
44.86
216.171
15.583
43.56
216.604
15.932
46.5
219.33
16.281
47.02
225.611
16.629
46.61
227.845
16.98
46.9
192.559
17.329
47.16
228.422
17.679
46.83
225.524

Time
Current (A)
Power Out (W)
18.054
49.54
238.109
18.404
49.78
233.787
18.806
49.54
236.655
19.155
49.92
221.411
19.505
45.92
228.085
19.854
46.91
245.432
20.202
49.99
243.202
20.551
50
241.485
20.928
50.42
234.938
21.277
48.97
233.578
21.626
50.11
228.921
21.976
47.85
227.763
22.326
48.19
231.73
22.673
49
218.042
23.035
47.45
228.464
23.399
47.98
237.296
23.748
48.94
237.078
24.097
49.8
237.801
24.447
49.98
233.908
24.823
49.85
238.991
25.172
49.45
232.305
25.522
48.81
229.754
25.942
48.15
222.32
26.328
47.3
221.165
26.693
47.69
232.057
27.052
46.84
227.361
27.401
45.62
218.17
27.75
43.63
220.428
28.127
45.08
216.042
28.477
45.61
205.025
28.879
44.02
205.424
29.228
44.97
210.784
29.577
44.82
208.808
29.928
43.48
196.792
30.276
41.6
187.373
30.625
39.42
194.662
31
39.09
194.339
31.35
41.89
193.246
31.698
42.22
202.78

Time
Current (A)
Power Out (W)
32.048
41.44
193.451
32.397
42.03
199.222
32.748
40.94
197.248
33.099
43.36
204.988
33.456
42.39
195.503
33.813
42.24
198.307
34.172
41.45
192.265
34.521
40.51
185.319
34.871
39.91
191.971
35.247
40.28
179.061
35.612
39.91
193.428
35.972
40.08
199.128
36.347
42.16
200.182
36.697
40.65
188.061
37.046
40.08
190.642
37.395
39.69
182.161
37.744
40.21
176.779
Time (s)
Current (A)
Power Out (W)
38.122
42.35
194
38.468
41.65
189.127
38.819
40.97
209.623
39.168
41.85
181.83
39.518
41.54
196.693
39.867
41.68
190.597
40.245
38.76
193.749
40.591
42.14
204.125
40.941
38.29
190.7
41.291
39.19
191.285
41.641
38.89
186.837

Time
Current (A)
Power Out (W)
41.989
39.62
180.269
42.35
40.57
184.796
42.715
41.32
181.755
43.066
42.43
199.43
43.467
41.42
205.257
43.817
41.32
209.121
44.166
42.3
208.251
44.513
44.31
202.518
44.863
42.76
196.932
45.212
40.83
182.796
45.59
39.84
192.298
45.938
39.8
182.56
46.289
40.06
200.16
46.636
39.84
205.426
46.986
40.12
183.576
47.362
41.13
179.844
47.711
38.08
177.28
48.06
41.1
182.674
48.463
39.74
184.189
48.811
39.85
181.332
49.16
39.36
185.057
49.511
41.68
205.085
49.859
40.51
191.195
50.238
40.1
187.218
50.586
41.6
204.403
50.936
42.58
192.587
51.283
41.84
192.656
51.634
40.42
186.309
51.983
39.95
198.466
52.359
41.25
199.597
52.761
41.63
196.901
53.126
40.32
189.461
53.487
39.77
197.536
53.836
41.13
192.356
54.187
40.94
206.799
54.562
41.31
198.66
54.965
41.8
200.701
55.33
42.83
187.947
55.69
41.91
193.931

Time
Current (A)
Power Out (W)
56.092
41.47
193.658
56.442
40.78
188.194
56.791
39.51
193.224
57.14
39.98
180.63
57.516
40.01
196.586
57.865
41.75
208.959
58.215
43.49
200.182
58.563
42.18
188.725
58.913
41.7
189.55
59.262
40.77
189.171
59.612
40.7
193.11
59.988
42.24
200.583
60.336
41.96
203.568
60.686
43.21
210.068
61.035
43.24
209.895
61.384
42.77
208.484
61.761
43.75
208.735
62.136
43.6
206.337
62.485
43.53
206.75
62.861
43.15
201.819
63.209
43.41
208.459
63.56
44.74
208.239
63.908
43.64
205.23
64.256
43.69
205.973
64.633
42.79
195.999
64.982
42.11
207.479
65.332
43.75
195.319
65.681
42.82
201.545
66.029
42.03
204.436
66.378
43.59
201.344
66.738
42.95
198.094
67.093
43.01
204.101
67.455
43.5
207.617
67.803
43.25
208.386
68.153
43.16
210.562
68.529
43.88
210.685
68.878
44.61
212.663
69.228
45.16
208.562
69.577
43.9
197.234
69.926
43.31
209.005
70.275
41.74
204.101
70.651
43.72
204.992
70.999
44.01
213.088
71.35
43.56
210.933
71.698
44.81
213.239
72.075
45
203.645
72.424
44.63
206.337
72.773
44.6
203.645
73.122
42.88
202.875
73.472
42.88
205.617
73.819
42.44
207.91
74.196
43.13
203.813
74.545
41.84
200.812
74.894
43.59
201.119
75.243
43.22
207.593
75.592
43.79
205.254
Time (s)
Current (A)
Power Out (W)
75.942
42.56
206.556
76.317
44.16
210.191
76.668
44.21
205.762
77.017
43.05
204.775
77.366
43.3
201.545
77.769
43.61
204.823
78.118
43.52
206.969
78.466
42.98
203.429
78.816
43.59
205.835
79.192
43.37
202.422
79.541
42.71
191.858

Time
Current (A)
Power Out (W)
79.892
42.94
208.925
80.239
42.24
202.675
80.589
44.05
203.693
80.966
44.35
205.876
81.314
42.62
207.568
81.664
44.11
205.876
82.013
43.18
204.029
82.364
42.69
202.318
82.713
43.21
200.276
83.115
42.85
196.716
83.464
43.45
208.081
83.812
43.95
203.837
84.189
43.37
200.93
84.538
42.92
196.924
84.888
42.87
198.963
85.237
43.19
200.088
85.586
42.7
200.559
85.936
42.62
201.072
86.312
42.09
198.8
86.661
42.65
201.486
87.012
42.69
186.907
87.413
41.85
195.666
87.763
42.58
198.025
88.112
43.31
197.133
88.461
43.31
197.792
88.809
42.91
199.621
89.169
43.38
193.772
89.554
42.8
194.431
89.91
42.8
195.688
90.262
42.53
194.959
90.637
43.41
194.114
90.987
43.16
192.565
91.372
41.16
190.239
91.755
42.01
196.994
92.114
42.62
132.311
92.463
65.88
116.224
92.84
65.09
107.4
93.19
62.84
104.303
93.591
62.4
72.527

Time
Current (A)
Power Out (W)
93.941
92.27
30.824
94.29
2.53
35.274
94.639
0
10.345
94.987
0
3.647
95.338
0
1.118
95.686
0
0.165
96.064
0
0.034
96.41
0
0
96.774
0
0
97.146
0
0
97.501
0
0
97.861
0
0
98.21
0
0
98.569
0
0
98.951
0
0
99.323
0
0
99.703
0
0
100.082
0
0
100.465
0
0
100.816
0
0
101.164
0
0
101.514
0
0
101.89
0
0
102.28
0
0
102.654
0
0
103.007
0
0
103.381
0
0
103.756
0
0
104.11
0
0
104.508
0
0
104.875
0
0
105.238
0
0
105.626
0
0
105.986
0
0
106.34
0
0
106.701
0
0
107.076
0
0
107.426
0
0
107.774
0
0

Time
Current (A)
Power Out (W)
108.123
0
0
108.482
0
0
108.849
0
0
109.197
0
0
109.545
0
0
109.894
0
0
110.284
0
0
110.676
0
0
111.034
0
0
111.39
0
0
111.748
0
0
112.112
0
0
112.489
0
0
112.849
0
0
113.199
0
0
113.549
0
0

Click to Collapse 3 Minute Peak Power Test Data

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