Ametek Gemco 1950-4 User manual

DESCRIPTION

TheGemcoRotatingCamLimitSwitchhasbeen

developedtomeetallrequirementsforanindustrial

multipurposecam-actuatedlimitswitchinapplications

wherepreciserepetitivesequential,automatic,orsemi-

automaticoperationsarerequiredincontrolcircuitry.

Whenmotionisexpressedinshaftrotation,either

througharollerchain,gear train, or directly,the Gemco

RotatingCamLimitSwitchmakes it possibletoopenor

closeindependentcircuitsatanydesiredangularposition

oftheinputshaft. Anyclosedcircuit or opencircuitfrom

4°to 356° isobtainable without theuse of specialcams.

Allcamsettingscanbeadjusted at any angularposition

ofthecamshaft.

MAINTENANCE & INSTALLATION

Lifetimesealedballbearingsprovidesmooth

maintenance-freeoperationandallowmountingofthe

GemcoMicro-Adjust RotatingCamLimitSwitchinany

position.

NO TOOLS NECESSARY!

TO ADJUST CAM SETTING

SUGGESTED SET-UP PROCEDURE

The Gemco Micro-AdjustCams maybe adjusted either

beforeorafterinstallation. Thefollowingprocedureis

recommendedforcamadjustment.

1. Mounttheassemblyandcoupleshaftdriving member

withtheshaftkeywayalignedwiththepositioningarrow

locatedonthe bearingendplate. The machine shouldbe

inthestartcycle positionwithallcams set atzero.

2. Turncamadjustment disctothe desired setting,

observingthe angular degree positionmarkingsonthe

topof the cam block.

3. Followthe cam settingprocedure asdescribed inside

thecoverof the enclosure.

Gemco

Section 1980S

2LLMM

EASY SETUP PROCEDURE

ALLCAMS SHOWNATZERO CYCLE POSITION

OPEN CLOSED

TYPICAL SETTINGS AT BEGINNING

OF MACHINE CYCLE

MOUNTING OF UNIT

Mounttheassembly andcoupletheinput shaft to

thedriving member,withtheshaftkeywayupandin

linewith the positioning arrowonthebearingend

plate. Themachineshould be inthestartcycle

position.

ESTABLISHING CAM SHAFT

DIRECTION OF ROTATION

Camsettingsshouldbemade with the camshaft

uppermostto theviewer. The picture at thetop

illustratesthisviewingpositionandalsoshowsthe

adjustingtoolbeing applied to the adjusting wheel.

Shaftrotation is alwaysestablishedofftheright

endoftheunitevenwhentheinputshaft,whether

director through agear reducer, issituated atthe

leftend. Asanaidto designating shaftrotation

whengear reduceris used, consult page 10of the

1980Catalog Section.

CAM SETTINGS

Forclockwiserotation,set“make” angle with the

blackdialand “break” with thered dial fordwell

settingsless than 180° or greater. Reverse colors

fordwellsgreater than 180°.

Forcounterclockwiserotation,set“make”angle

withthe white dial and“break”withtheyellow

dial. Reversecolors for dwells greater than 180°.

Switchconnectionsshouldbe made inaccordance

withtheillustrationstotheright,which,incidentally,

arebothclockwiserotatingexamples.

ELECTRICAL CONTACTS

Thewelded silvercadmiumoxidecontactsprovidethefollowingadvantages:(1)Highelectricalconductiv-

ity, (2) Excellent resistance tostickingcontacts,(3)Minimumelectricalerosion. Thepresenceof cadmium

oxidegiveshigharcquenchingcharacteristicsofcadmiumwithoutareductionofhighconductivityoffine

silver. This is becausethecadmiumoxideremains as discreteparticlesthroughoutthesilver base andeach

exhibitsitsownphysicalcharacteristics.

SGNITARTCATNOCLACIRTCELE

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01010101

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1-0591TDPS

011 022 044 006

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---- ---- ---- ----

51016

---- ---- ---- ----

51515151

511 032 006

52.01.0 ----

515151

APPLICATION NOTE

TheN.O. andN.C. contacts of the single pole, doublethrow snapon circuitsof thesame snap switch has

twopoles, which can be usedon opposite polarities. The N.O. andN.C. circuit of each poleof thetwo

polesnapswitch, however, mustbe used onthesame polarity.

°0 °081 °063

HCTIWSTIMIL REBMUN

°09°072

Start Cycle

Position

DIRECTION OF ROTATION

4LLMM

Figure1

NEMA1 Style

Figure2

NEMA4 Style

Figure3

NEMA12 Style

6LLMM

Form608

1980S.M1R

12/99.Z97

AMETEK Patriot Sensors 1080 N. Crooks Road Clawson, MI 48017

800-635-0289  248-435-0700  Fax 248-435-8120

www.ametek.com  www.patriotsensors.com

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PARTSLISTSECTION-1980

* Item not shown on drawing

It is recommended that snap switches be replaced after fifteen million operations.

•

This manual suits for next models

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