VELMEX VXM-3 - Units & Directions

Unit Conversion for Velmex Positioners
*
TypicalUniSlidemodel(wherexisfromabovetable): MB4024xJ-S4
Example#1: Tomove3.000incheswiththeBiSlideE04leadscrew(3.000÷0.001=3,000) requiresa3,000step
index.
Example#2: Tomove90degreeswiththeB5990rotarytable(90÷0.01=9,000) requiresa9,000stepindex.
Example#3: Tomove4.000incheswiththeUniSlideW1leadscrew(4.000÷0.00025=16,000) requiresa16,000
stepindex.
Other formulas:
1Motorrev=400steps
LinearSpeed= Advanceperstepxstepspersecond
RotarySpeed= Advanceperstepxstepspersecond
Stepspersecond÷400=rev/sec
**TypicalBiSlidemodel(wherexisfromabovetable): MN10-0100-x-21
To convert from "real" units to steps, divide the distance desired to move by the
Advance per step. (Distance ÷Adv per step = Steps)
11
TheVXMusesstepunitsforIndexandSpeedparameters. Onestepis1/400ofamotor
revolution. StepunitsfordistanceareusedwiththeIndexcommands(”I”command.)
SpeedisinunitsofSteps/Second(SPS.) Steps/Secondunitsforspeedareusedwith
theSpeedcommands(”S”command.)
Accelerationcommands(”A”command)arevaluesfrom1to127thatarerelativeto
steps/sec units.RefertoApplicationNote#106formoreinformationaboutacceleration
unitsandmoveprofiles.
2
Directionisrelativetothedevicethemotorisusedon. Onscrewdriveactuatorslike
UniSlidesandBiSlides,positiveisthedirectionmovingawayfromthemotor.
OnwormgeartyperotarytablesliketheVelmexB4800orB5990,positiveiscounter
clockwise(CCW.) Toreorientdirectionsrefertothe“setDM”commandinAppendix
O.
Units & Directions
Positive®
Positive
CCW
Positive
CW
WormGear
RotaryTable
ScrewDriveActuator
Motor
Lead Screw Models
UniSlide* BiSlide** Advance per turn Advance per step
Speed
@ 1000 SPS (2.5 rev/sec)
Units Units
C P40 E25
0.025 inch 0.0000625inch
Units
0.0625inch/sec
B P20 E50
0.0001250inch
W1 P10 E01
0.0002500inch
W2 P5 E02
0.0005000inch
W4 P2.5 E04
0.05 inch
0.1 inch
0.2 inch
0.4inch
0.0010000inch
0.125inch/sec
0.25inch/sec
0.5inch/sec
1 inch/sec
K1 Q1 M01
1mm 0.0025mm 2.5mm/sec
K2 Q2 M02
2mm 0.0050mm 5mm/sec
Rotary Tables
GearRatio
B4872 72:1
5degree 0.0125degree 12.5degree/sec
B4836 36:1
10degree 0.0250degree 25degree/sec
B4818 18:1
20degree 0.0500degree 50degree/sec
B5990 90:1
4degree 0.0100degree 10degree/sec