HS-785HB Channel Slider Kit

A linear slider for a rotary servo motor

The Channel Slider Kit allows you to convert the rotary motion of a Hitec HS-785HB servo into a linear motion of up to 48.8 cm in length. The timing belt and two pinion pulleys included in the kit ensure smooth movement.

Simply send a PWM signal from a motor controller to launch your carriage on the slider. By modulating this signal between 820 and 2180 µs, you can refine the carriage speed so that it doesn’t hit the ends of the slider too hard. With a radio-controlled transmitter, the full travel length is approximately 32.3 cm. An output voltage of 6V will deliver a travel speed of 11.9 mm per second.

Numerous development possibilities

The kit offers two assembly options: on the top or on the side. Because these are Actobotics parts, they are compatible with all the other components of the same brand, offering you different project upgrade possibilities – you can for example create a robotised telescopic arm, a linear slider for a video camera, install sensors or develop an automated system.

You will need a Phillips screwdriver, a 1/64”” hex key and a 3/32” hex key to assemble your kit.

Technical specifications of the HS-785HB slider kit

Kit includes:

• 1 HS-785HB servo motor
• 1 x 609.6 mm aluminium channel
• 2 x 6.35 mm bore pinion pulleys (15 teeth)
• 1 flanged ball bearing (ID 6.35 mm, OD 12.7 mm)
• 1 A-type XL belt mount
• 1 pair of brackets for 1/4 scale servo plate
• 2 x 6.35 mm bore bottom tapped pillow blocks
• 1 C1 servo spline to 6.35 mm shaft coupler (set screw)
• 2 E-type side tapped pattern mounts
• D-type channel slider (x 2)
• A-type 90° dual side mount (x 2)
• 1 stainless-steel D-shaft, 50.8 x 6.35 mm
• 1 stainless-steel D-shaft, 31.75 x 6.35 mm
• 1 pair of small A-type channel feet
• 1 x 12.7 mm aluminium hub spacer
• 1 A-type large servo plate
• 1 acetal carriage bolt tensioner plate
• 1 x ¼-20 carriage bolt
• 1 x ¼-20 knob
• 1 x 1.16 m timing belt
• 25 x 6.35 mm 6-32 zinc socket head cap screws
• 5 x 6.35 mm shaft spacers
• 1 x 6.35 mm set screw collar
• 1 x 0.770-0.770 hub adapter
• 25 x 25.4 mm 6-32 zinc socket head cap screws
• 1 C-type quad hub mount
• 25 x 7.9 mm 3-32 socket head cap screws
• 4 x 33.5 mm aluminium standoffs
• 4 x #6 standard washers
• Overall length: 609.6 mm
• Total weight: 635 g
• Travel: 488.9 mm
• PWM signal range to achieve full travel: 820–2180 µsec
• Motor specifications:
• Control system: +pulse width control 1500 µs neutral
• Required pulse: 3–5V peak-to-peak square wave
• Operating voltage: 4.8–6V
• Operating temperature range: -20 to +60 °C
• Operating speed (4.8V): 1.68 s/360° at no load
• Operating speed (6V): 1.4 s/360° at no load
• Stall torque at 4.8V: 11 kg/cm
• Stall torque at 6V: 13.2 kg/cm
• Operating angle: 630° one side pulse travelling 400 µs
• Continuous rotation modifiable: yes
• Direction: clockwise/pulse travelling 1500–1900 µsec
• Current drain (4.8V): 8 mA idle and 230 mA no load operating
• Current drain (6V): 8.7 mA idle and 285 mA no load operating
• Dead bandwidth: 8 µs
• Motor type: 3 pole ferrite
• Potentiometer drive: indirect drive
• Bearing type: 1 bearing and 1 Oilite bushing
• Gear type: all karbonite gear
• Connector wire length: 300 mm
• Dimensions: 59 x 29 x 50 mm
• Weight: 110 g

Resources for the 637166 rotary servo kit

Problems assembling your 637166 kit or getting it to work? These two videos should help: