Steering Gear-bot muscles

What is a steering gear?

The steering gear is the power source for controlling the motion of the remote control model. Unlike the General motor, the steering gear can provide very precise position control and high torque.

Simulation or digital?

Digital Steering gear has appeared 10 years ago. Now, almost all mainstream manufacturers are producing it. Compared with the simulated steering gear, it has two major advantages: Speed and holding power. The biggest difference between the two is the microprocessor of the Digital Steering gear. It is 6 times faster than the simulation of the steering gear in the control of the steering gear! When the "brain" of the Digital Steering Gear reports a wrong potentiometer to receive a signal telling it the current position of the output shaft, its response is so fast that there is no "no reaction zone ".

The "reactive zone" means that the output shaft must rotate a certain angle from the current position to cause the processor to issue instructions to correct its position. Because the signal refresh frequency of the Digital Steering gear is usually 300 times/second, and the simulation steering gear is only 50 to 60 times/Second, the Digital Steering gear can be more powerful to maintain the correct position, this is the so-called "persistence ". Another result is a buzz, even when the steering gear is idle. The cost of more force tolerance is that the Digital Steering Gear will consume more power. Therefore, a high-capacity NIMH battery pack is required for fuel trucks.

Plastic or metal gear?

When you buy a steering gear, gear is the first consideration. The steering gear is usually made of plastic or metal (copper or aluminum ). You will also guess that the cost of plastic is much lower than that of metal, but the strength is poor. Each Steering Gear of some manufacturers is divided into the plastic tooth version and the metal tooth version, while the plastic version usually has relatively small torque parameters. However, plastic gear has a winning advantage that it produces very little radio interference. The steering gear with severe electronic noise may be out of control. This is why many toggle drivers use plastic teeth on the throttles.

 

Multi-pole motor or non-core motor?

The steering gear is usually driven by two types of motors, multi-pole and non-core. The structure of a Multi-pole motor is similar to that of a traditional motor. The difference is that they have three to five rotor magnetic poles (equivalent to a small electromagnet ). The 5-pole motor is more accurate than the 3-pole motor. However, no matter how many Poles, they all have a feature that is not available to the motor, that is, when the two poles of the motor's rotor are within the same Permanent Magnet range, the torque is relatively small. Because the poles "share" the magnetic field. This is not a big problem for your 540 motor, but the steering gear should be kept in the same position for several seconds under stress.

The non-core motor does not use such a rotor. A lightweight wire "basket" is fitted with a permanent magnet as a rotor. This design will be much faster than the rotor of the core, especially when changing the movement direction. Moreover, this motor is much more efficient than polar motors, but produces more heat and is more sensitive to vibration.

What are the parameters? Torque vs. Speed

The steering gear usually sweeps the complete 60 degrees without load, and the required number of seconds indicates the speed; the kilogram (or oz) indicates the torque. In addition, most manufacturers provide steering gear at 4.8 Volts (4 batteries) and 6 Volts (5 batteries. Even if the six-volt parameter is not provided, it is safe to use the steering gear at this voltage unless the vendor has other statements.

Generally, you should purchase the fastest and maximum torque steering gear within your budget. Manufacturers usually sell the same wide steering gear into two models. The only difference is that one gear ratio is speed-oriented, and the other is torque-oriented. If you have to make a choice, choose more torque, because if the steering gear does not have enough power to turn the wheel, it is useless to speed up.

 

Airtrow./ Sanwa
Airtroncis provides fewer Digital Steering Gear than other manufacturers, with only three. However, they are good in some aspects. The steering gear uses a standard-sized housing and a Coreless motor. The 0.06-second rotation speed of 94758z is the fastest steering gear on the market (equivalent to the s9254 of Futaba ). 94755z is a combination of plastic and metal gears, and the other two are all-metallic.

Futaba
11 Digital Steering gears are provided, and the product line is the most diversified, including plastic, metal, small size, standard size, large size, and thin standard size steering gear, and models with low center of gravity. S9254 is also the fastest Steering Gear

Hitec
Hitec products are well known for their price advantages. Among the 11 products, most of them are standard-sized, one is a mini steering gear, all using metal teeth. HS-5996, HS-5997 and HS-5998 have a Ti alloy gear (only hitec has ). The 333 Oz.-In. torque of the HS-5955 is one of the most powerful steering gear.

JR racing
All Jr's Digital Steering Gear comes in standard sizes, metal teeth, and high-efficiency cardless motors. The 282 Oz.-In torque of ds9000t is also quite powerful.

Ko propo
Ko's product line is quite unique. The list is labeled with the "ICS" standard digital steering gear, while the model labeled "FET" uses the FET tube power enhancement technology. Ko also provides a series of relatively inexpensive Fully Plastic gear Steering gears. Standard-sized steering gear, 1/12 mini steering gear, and large steering gear. All Ko Steering Gear uses a Coreless motor.

 

The world's main types of steering gear and price list:

Item No.	Torque (Oz.-In. @ volts)	Transit Time (Sec .)	Gear Type	Motor Type	Weight (Grams)	Case size	Price *
Airtrow.gov.cn
94755z	81 @ 6	0.11	P/M	Coreless	58	Standard	$105
94757z	115 @ 6	0.07	Metal	Coreless	60	Standard	$110
94758z	115 @ 6	0.06	Metal	Coreless	60	Standard	$110
Futaba
S3150	51.4 @ 4.8	0.25	Nylon	Coreless	22	Slim Standard	$60
S9650	62.5 @ 6	0.11	Nylon	Coreless	26	Mini	$60
S3151	43.1 @ 4.8	0.21	Nylon	Coreless	42	Standard	$35
S3152	87 @ 6	0.18	Nylon	Coreless	63	Standard	$50
S9254	47.2 @ 4.8	0.06	Nylon	Coreless	49	Standard	$110
S9255	112 @ 4.8	0.17	Metal	Coreless	63	Standard	$115
S9350	139 @ 6	0.12	Metal	Coreless	63	Standard	$100
S9351	192 @ 6	0.13	Metal	Coreless	63	Standard	$110
S9451	121 @ 6	0.10	Metal	Coreless	56	Standard	$80
S9550	83 @ 6	0.11	Metal	Coreless	45	Low-profile	$80
S9550	83 @ 6	0.11	Metal	Coreless	45	Low-profile	$80
S5050	264 @ 6	0.20	Metal	5-pole	124	Large	$90
Hitec
HS-5245	76 @ 6	0.12	Metal	3-pole	32	Micro	$48
HS-5625	131 @ 6	0.14	Metal	3-pole	60	Standard	$55
HS-5645	168 @ 6	0.18	Metal	3-pole	60	Standard	$55
HS-5925	128 @ 6	0.08	Metal	Coreless	56	Standard	$90
HS-5945	181 @ 6	0.13	Metal	Coreless	56	Standard	$90
HS-5955	333 @ 6	0.15	Metal	Coreless	62	Standard	$115
HS-5996	111 @ 6	0.10	Metal	Coreless	62	Standard	$115
HS-5997	181 @ 6	0.14	Metal	Coreless	62	Standard	$115
HS-5998	250 @ 6	0.19	Metal	Coreless	62	Standard	$115
HS-6635	83 @ 6	0.15	Metal	3-pole	52	Standard	$48
HS-6965	111 @ 6	0.08	Metal	Coreless	52	Standard	$85
JR racing
Ds8550	188 @ 6	0.15	Metal	Coreless	54	Standard	$115
Ds8800s	98 @ 6	0.10	Metal	Coreless	57	Standard	$110
Ds8800t	188 @ 6	0.18	Metal	Coreless	57	Standard	$110
Ds9000t	282 @ 6	0.15	Metal	Coreless	62	Standard	$115
Ds9000s	282 @ 6	0.15	Metal	Coreless	62	Standard	$115
Ko propo
PDS-2363 ICs	111 @ 6	0.08	Metal	Coreless	56	Standard	$133
PDS-2364 ICs	180.5 @ 6	0.13	Metal	Coreless	56	Standard	$133
PDS-763 ICs	90.3 @ 6	0.14	Plastic	Coreless	45	Standard	$54
PDS-764 ICs	104.2 @ 6	0.16	Plastic	Coreless	45	Standard	$54
PDS-8044 ICs	333 @ 6	0.20	Metal	Coreless	142	Large	$130
PDS-949 ICs	38.8 @ 6	0.09	Metal	Coreless	27	Standard	$100
PDS-2343 (FET)	111 @ 6	0.08	Metal	Coreless	55	Standard	$115
PDS-2344 (FET)	180.5 @ 6	0.13	Metal	Coreless	55	Standard	$115
PDS-2123 (FET)	131.9 @ 6	0.06	Metal	Coreless	55	Standard	$115
* The price is for reference only.