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Adding Motors

Why

The addfirst motors?

step in motorising a mount is adding the motors itself. The most common type of motor used in this type of upgrade is a NEMA 17 stepper motor. These types of motors have standardised dimensions and allow a controller to have the motor make precise changes in position. That is also how they differ from normal DC motors that don't allow you to change the position in a precise manner.

OneThere are three ways to mechanically connect the motor to the driveshaft of the commonmount: upgradesdirection doneconnection, belt drive and gear drive. Direct connection and belt drive are the recommended methods due to mountsthem withhaving manualno controlsor isalmost ano motorbacklash. upgrade.The Outadvantage of the boxbelt thesedrive mountsis don'tthat comeyou withcan any,add soextra slewinggearing to your mount. If you use for example a 20 teeth pulley on the desired targetmotor and trackinga it60 alltetth needspulley toon bethe donemount manually.driveshaft, Thereyou iscan add an officialextra motor1:3 kitreduction. available,If butthe extra reduction isn't needed and it is rathereasier expensiveto mount the motor in line with the mount driveshaft, then a direct connection can be used.

3D printed motor mounts

EQ3-2 (CG-4) NEMA 17 Mounting Brackets

Saiti on thingiverse made excellent mounting brackets for justNEMA adding17 basicmotors slewingfor andthe tracking.EQ3-2. ThatDownside is whythat they use some harder to get GT2 belts.

Bill of materials:

  • 2x NEMA 17 motors (use 0.9 degree / 400 step models with high torque)
  • 8x M3x12 bolts
  • 8x M3 washers
  • 2x M5x16 bolts
  • 1x M5 nut
  • 3x M5 washers
  • 2x GT2 48 teeth pulley wheel
  • 2x GT2 16 teeth pulley wheel
  • closed loop 172 mm belt
  • closed loop 136 mm belt

Can be printed with any printer that fits these parts, keep infill high so that bolts can be tight. 60% as mentioned on the communitythingiverse haspage steppedmight not be enough. Print the parts in andthe modeledfollowing mountsorientation to add stepperstrength motorswhere tothe thisM5 mount.
bolts go.

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Backup of models: DE_v4_176_rounded.STL RA_EQ3-2.STL

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