Hi,
I can’t find anywhere to post this except for here, so here goes.
For the power gearbox for motors, code RB-Sct-180, what motors can I use exactly. I would like to use one with an encoder., but can’t find any ones that match.
I am making a telescope/camera pan/tilt mount, and am going to use the SPT400 pan drive mount, as the tilt. Either I use the power gearbox pan mount or the servo one with a continuous rotation servo, but postion is quite important.
I would appreciate any advice!
Thanks.
Thanks for your reply. I am now confused by a couple of things.
I am going to use an arduino due for the control, and use the E2PROM asa way to keep the position between power losses. I am looking to make a telescope tracking mount from scratch, I know how to do the softeare and the electronics but not the mounting and mechanics.
For the tilt section, I have seen RB-Sct-04, the 5:1 power tilt for servos. With the winch servo (RB-Hit-53), that should rotate from straight up to horizontal as far as I can see.
For the pan, I will use the RB-Sct-180 (power gearbox for gear motor, which by looking at it means the pan mechanism will mount straight onto the drive hub) with a motor. None of the spur gear motors mentioned have encoders on them. Would a RB-Pol-125 (Pololu 50:1 Gear motor with encoder) fit into the gearbox?
Sorry to be a ignoramus!
Thanks for your help. After measuring the telescope and drawing a cad diagram with some estimated dimensions of the gearboxes on I don’t think that this is going to work. The back of the scope will hit the gearbox if tilted a certain way. I will think if there is any way with linear actuators I could make both gearboxes work without that obstruction, but I’m not too sure!
Thanks again! I will look for something else to build for now!
We suggest using the ServoCity Gear Motors (RB-Sct-181, 182, 183, 184). Note that these have the same mounting pattern as the GHM gear motors from Lynxmotion, which are also the same as the gear motors from Cytron. They all can be found under the Spur gear motors category. These will not give you position feeback (as soon as the microcontroller loses power, you lose the position). Some motors as part of the GHM series have an encoder option. If you need position feedback on the pan mechanism, use a power gearbox based on a servo.
You can certainly use an Arduino to control the setup, but note that an Arduino cannot drive motors directly - you’ll need motor controllers.
The winch servo cannot be used with RB-Sct-04 - it’s too large and the wrong dimensions. RB-Sct-04 can only be used with the following servo types: Hitec HS-3xx, 4xx, 5xx, 6xx, 54xx, 56xx, and 59xx servos.
RB-Sct-04 can rotate over 90 degrees (closer to 120 degrees if you push it).
Yes it should.
Yes, it should (though we have not physically tested the two together though, but the dimensions seem to be ok).
Not at all - you start to realize that mixing and matching components from various suppliers is not easy.
