Positron V3.2 - Z Drive

This guide will contain instructions for building the Z drive for the Positron V3.2.

1. Parts to Print

Before you start to assemble, please make sure you have these parts printed.

Printed Parts

Step 1 of 1 in this section

ABS filament is recommended for printing these parts.

Z Drive Main Body x1 Remember to remove the printed support.

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Z Drive Outer Housing x1

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Z Motor Bracket x1

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2. Installation

Prepare Printed Parts

Step 1 of 8 in this section

Install heatset inserts into the printed Z drive main body and outer housing.

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Install one MR85 bearing into the hole of the main body as indicated in the picture.

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Prepare Planetary Gears

Step 2 of 8 in this section

Position the MR85 bearings into the planetary gears. Three sets are needed.

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Assemble Planerary Carrier Shaft

Step 3 of 8 in this section

Install the planetary gears to the planetary carrier shaft as shown in the picture.

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Place an MF148ZZ bearing on the shaft.

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Install Planetary Gearbox Cover

Step 4 of 8 in this section

Make the shaft go through the hollow center of the outer housing.

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Please apply small grease to the gears and check that the gear spin freely.

Cover the outer housing with the planetary gearbox cover.

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Add the Z Motor

Step 5 of 8 in this section

Attach the Z motor to the planetary gearbox cover so that the wires are oriented towards the bottom.

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Install the pulley into the hole of the outer housing.

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Secure the pulley with a grubscrew so that it connects to the shaft on the flat side.

Cover with the printed main body.

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Fasten the Screws

Step 6 of 8 in this section

Put the printed Z motor bracket as shown in the picture and secure with an M3x25 BHCS screw.

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Position the washers and the idler in the indicated order and secure with an M3x20 BHCS screw.

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Use an M3x20 BHCS screw in the left hole (red arrow) and an M3x8 BHCS screw in the right hole (blue arrow).

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Don't use too much force with the screws.

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Install Heatset Inserts

Step 7 of 8 in this section

Install one M2.5x3x4 heatset insert into the indicated hole.

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Assembly Complete

Step 8 of 8 in this section

You have completed the assembly of the Z drive.

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