11-20-2020, 05:01 PM | #1 |
Newbie Join Date: Nov 2020 Location: East Springfield
Posts: 31
| Motor Rotation Question
I am building a SCX 10 II, and in the process of buying the electronics. I am looking at a HH CrawlMaster Pro 13T motor. It is asking me for the timing and rotation, I will probably go with the 6 degree timing but am not sure of the rotation. Any Advice? Thanks
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11-20-2020, 06:41 PM | #2 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,475
| Re: Motor Rotation Question
I'm pretty sure its forward rotation, its rigs like the TRX4 where they are reverse rotation due to the extra gear in the portals. If not you can simply re-time the motor which is easy with HH motors. |
11-21-2020, 04:31 AM | #3 |
Newbie Join Date: Nov 2020 Location: East Springfield
Posts: 31
| Re: Motor Rotation Question
Thanks for the response, it helps, wasn't quite sure
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11-21-2020, 02:40 PM | #4 |
Pebble Pounder Join Date: Aug 2020
Posts: 134
| Re: Motor Rotation Question
Rotation is determined by looking at it from the pinion side. My scx 10.2 runs clockwise Sent from my iPhone using Tapatalk |
11-23-2020, 11:41 AM | #5 |
RCC Addict Join Date: Aug 2017 Location: Fredericksburg, VA
Posts: 1,912
| Re: Motor Rotation Question
The timing on the HH motors is easily changed by rotating the end bell in the opposite direction of the normal forward motor rotation. When the timing is set to zero the motor rotation is mute meaning it will rotate either direction equally. I generally buy my HH motors with zero timing and then play with it once it is in the truck. I have four Crawlmater Pro 550 12t motors and love them.
Last edited by Inspector86; 11-29-2020 at 04:23 PM. |
11-25-2020, 12:47 AM | #6 |
Rock Stacker Join Date: Oct 2020 Location: San Jose
Posts: 85
| Re: Motor Rotation Question
Dumb question from the noob. I know about gas engine timing but what does timing do on a brushed motor? |
11-25-2020, 12:49 AM | #7 |
I wanna be Dave Join Date: Jun 2020 Location: The Big Island
Posts: 2,010
| Re: Motor Rotation Question |
11-25-2020, 12:56 AM | #8 |
Pebble Pounder Join Date: Aug 2020
Posts: 134
| Re: Motor Rotation Question
Motor runs faster in the direction it’s advanced and slower in the other. Sent from my iPhone using Tapatalk |
11-25-2020, 01:01 AM | #9 |
I wanna be Dave Join Date: Jun 2020 Location: The Big Island
Posts: 2,010
| Re: Motor Rotation Question |
11-25-2020, 01:37 AM | #10 |
Pebble Pounder Join Date: Aug 2020
Posts: 134
| Re: Motor Rotation Question
John Holmes has a good video on it. https://m.youtube.com/watch?v=G5-EZyPZBFI Sent from my iPhone using Tapatalk |
11-25-2020, 10:28 AM | #11 |
Rock Stacker Join Date: Oct 2020 Location: San Jose
Posts: 85
| Re: Motor Rotation Question |
11-25-2020, 11:33 AM | #12 |
I wanna be Dave Join Date: Jun 2017 Location: Humboldt county
Posts: 4,475
| Re: Motor Rotation Question
Theres also an effect on brush wear for brushed motors. In brushless and brushed motors increasing timing also adds heat.
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11-26-2020, 09:19 AM | #13 | |
I wanna be Dave Join Date: Dec 2006 Location: here
Posts: 3,042
| Re: Motor Rotation Question Quote:
Retard timing slows motor and can cause heat issues. Info from Holmes Hobbies Timing your motor Unless specified at the time of purchase, your brushed motor will have neutral (zero) timing and operate properly during clockwise (CW) and counterclockwise (CCW) rotation. *When the motor will rotate in one direction more than another, *timing advance is suggested. You can check the timing advance in many ways. *We suggest using more than one method until you are familiar with the task. *We suggest 3 volts for easy motor handling.* 1: The motor will spin faster “forwards” as compared to “reverse”. 2: The no-load amp draw will be higher than neutral timing. 3: A visual inspection reveals advanced brushes. * 1: You can check to see if the motor spins slightly faster in forwards direction with a tachometer, or with motor sound. *A faster motor or machine will generate higher pitch noise. *Press your motor against a table while you change timing to listen for the increase in RPM to indicate advanced timing.* 2: Timing the motor with amp draw requires an amp meter, we suggest all motor owners to have this tool. *Loosen the endbell and spin the motor with low voltage. *Rotate the endbell slowly until you find the lowest amp draw. *This is neutral timing, and may not be exact to the motor markings because of motor variation and brush tilt. *10 to 20% higher no load amp draw in the advanced direction is a safe setting. 3: To advance the timing visually, rotate the brushes (endbell) in the opposite direction of motor shaft rotation. This energizes the segments sooner during rotation. If your motor rotates clockwise for forward locomotion, rotate the enbell counterclockwise in relation to the can. Most Holmes motors have marks on the can and endbell that indicate 12, 24, and 36 degrees for CCW pinion rotation. *About 6 degrees of timing is what we have found to be an optimal balance of brush life and reverse/ brake performance below 20,000 rpm. *Twenty degrees of timing is best for very fast motors such as the 13t TorqueMaster for Twin Hammers.* * * [https://blog] Sent from my SM-G781U using Tapatalk | |
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