6-7
162068-1CD
162068-1CD
MH-SERIES
POSITIONER
6 Maintenance
6.5 Reset Headstock To Home Position
8. Slide the old brush out of the housing and replace it with the new one.
9. Put the brush holder back into housing compartment until the both
holes on the nut plate are aligned with holes in the housing.
10.Insert both screws through housing and into nut plate. Thread the
screws into nut plate loosely.
11. Push the brush holder up in front of the retaining edge and hold
steady.
12.Squeeze the brush retaining spring and push the brush against the
faceplate then release. The spring must hold the brush firmly against
the face plate (Figure 6-2).
13.Tighten the screws to 6.0 N•m (4.4 lbf-ft.).
14.Insert the ground cables onto the ground posts.
6.5 Reset Headstock To Home Position
The home position on the drive assembly is set in the controller by the
operator. Any position of the headstock can be programmed as home. The
factory setting of home position is found using the alignment hole, an
alignment tool, and the programming pendant.
Resetting of the home position is typically done before new tooling and
fixturing is installed, or when the motor has been serviced.
6.5.1 Homing
6.5.1.1 MH95/185/505/1605 – Type I
The factory home position for Type I positioners is located by aligning the
homing pin against the housing, after installing the pin in the faceplate
hole. Once Home position is found, some minor programming with the
programming pendant is required. To reset a MH95/MH185/MH505/
MH1605 headstock, proceed as follows:
1. Make sure robot(s) is in home position.
The weld ground brush must be hold firmly and evenly against the
faceplate. Uneven contact can subject the gear reducer bearing to weld
current.
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