From 32580c3c192c479fec82965dcfc8b36e32fdf45b Mon Sep 17 00:00:00 2001 From: Nico Stute Date: Mon, 13 Aug 2018 20:33:28 +0200 Subject: [PATCH] Update Getting Started.adoc --- docs/src/Getting Started.adoc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/docs/src/Getting Started.adoc b/docs/src/Getting Started.adoc index 4ab28d28..786a0beb 100644 --- a/docs/src/Getting Started.adoc +++ b/docs/src/Getting Started.adoc @@ -518,7 +518,7 @@ command. * conf0.r phase-neutral resistance (ohm) * conf0.l phase-neutral inductance (henry) * conf0.j inertia (kg*m^2) -* conf0.psi torque constant (Nm/A) +* conf0.psi torque constant (V*s/rad) * conf0.polecount number of pole pairs * conf0.max_vel max velocity (rad/s) * conf0.max_acc max acceleration (rad/s^2) @@ -554,6 +554,7 @@ The default value works for most motors. Normaly you don't have to measure this! There is no common ground for the toque constant. Some manufacturers state the current in RMS, others in peak-to-peak. We also stumbled over values that were neither. How to determine psi: + #### Scope #### 1. Drive motor at constant speed (lathe, power drill, ...) 2. Connect an oscilloscope between two phases and measure frequency F (Hz) and peak, line-to-line voltage U0 (V)