Maximum velocity

From the original Synthetos forum (2011–2025)

Started by mcgyvr on in TinyG Support. 1 reply, last activity Jul 18, 2013.

#

I have max velocity set to 250 in/min on both my x and Y axis. When you do a G0 X5 or G0 Y5 the velocity is never reported higher than 250 as expected. But when its an X AND Y movement it reports higher than 250 (into the 300's) (see below)
Is that normal and its the "calculated" angular velocity or is this a bug.. (running master branch 370.08 firmware)

[xvm] velocity maximum 250.000 in/min
tinyg [inch] ok>
[yvm] velocity maximum 250.000 in/min
tinyg [inch] ok>
tinyg [inch] ok>
posx:6.000,posy:6.000,vel:0.401,stat:5
posx:5.981,posy:5.981,vel:44.194
posx:5.862,posy:5.862,vel:168.459
posx:5.580,posy:5.580,vel:300.540
posx:5.193,posy:5.193,vel:352.652
posx:4.778,posy:4.778,vel:353.553
posx:4.362,posy:4.362
posx:3.967,posy:3.967
posx:3.551,posy:3.551
posx:3.156,posy:3.156
posx:2.740,posy:2.740
posx:2.324,posy:2.324
posx:1.929,posy:1.929
posx:1.513,posy:1.513
posx:1.098,posy:1.098
posx:0.706,posy:0.706,vel:347.140
posx:0.336,posy:0.336,vel:280.498
posx:0.094,posy:0.094,vel:137.192
posx:0.009,posy:0.009,vel:28.962
qr:24
posx:0.000,posy:0.000,vel:0.000,stat:3

Staff #

It is correct. The calculated velocity for G0 is the vector sum of all the velocities in the move. FOr G1 (and G2, G3) the velocity is limited to the feedrate specified in the F word. Try G1 F250 x100 y100 and the velocity will not go above 250.

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