User's Manual

STEP 6. Install Counterweight(s)and Telescope

Before putting on CW, make sure the mount is at its zero position, i.e., CW shaft points to the ground.

Disengage the R.A. Gear Switch to set the R.A. axis free before loading the CW. Remove the CW

Safety Cap at the end of CW Shaft. Glide the CW over the shaft with the larger hole opening facing

down. Tighten the CW Locking Screw to hold the CW in place. Place the Safety Cap back onto the

shaft. Move the CW to the bottom of the shaft and tighten the CW locking Screw.

Figure 19. Install Counterweight

You may need more CW for heavier payloads, or a smaller CW for lighter scopes.

CEM40G is equipped with a Vixen/Losmandy-D dual saddle. It can receive either a Vixen or a

Losmandy-D plate. Release the dovetail saddle locking knobs and slide the telescope dovetail plate

into the saddle. Tighten the saddle locking knobs.

STEP 7. Balance the Payload

Before mounting an OTA, make sure the arrow on dovetail saddle is facing front. If it is not,

release DEC gear switch and rotate dovetail saddle 180°.

After attaching the scope and accessories, the mount head assembly must be balanced in both DEC

and RA axes to ensure minimum stresses on the mount driving mechanism.

CAUTION: The telescope may swing freely when the R.A. or DEC Gear Switch is disengaged.

Always hold on to the mount and/or telescope assembly before releasing the Gear Switches to

prevent it from swinging, which can cause personal injuries and/or equipment damages.

Set the mount at Zero Position. Disengage both RA and DEC gear switches and move the mount to

horizontal position to check balance. Return to Zero Position for balance adjustment. Balance the DEC

axis by moving the scope with accessories back and forth in the mount saddle or within the scope

mounting rings. Balance the assembly in R.A. axis by moving CW along its shaft. Repeat the process

until both DEC and RA axes are balanced.

CAUTION: The balancing process MUST be done with Gear Switch at the total disengaged

position! Otherwise it might damage the worm system.