Motor Test 5

AllElectronics.com DCM-351
 http://www.allelectronics.com/make-a-store/item/DCM-351/24-VDC-GEAR-MOTOR-W/TURNTABLE/1.html

 

Description:
24 VDC GEAR MOTOR W/ TURNTABLE
Relatively powerful, low-current DC motor and gearbox with a 4.9" diameter plastic (nylon?) turntable with a rubber o-ring circumference that could be used to drive another wheel. Turntable can be removed from motor and rubber ring on turntable can be removed as well. Motor gearbox has a 5/16" diameter shaft that is flatted and splined.

Specs:

• 45RPM @ 24 Vdc, 60mA - operates at 12Vdc at 1/2 speed.
• Drive motor - Mabuchi RS-380SH. 1.1" diameter x 1.67".
• Gearbox - Molon #CHM-2435-1. 2.75" x 3.00" x 0.57" Threaded mounting holes in four corners. 5/16" diameter shaft, flatted and splined.

Price for one - $9.75 Shipping for 1 - 7.00
Price for ten - $9.75 each Shipping for 10 - $7.00

PROS -
Medium Torque
Seller has good shipping policy
Good price
Good customer service
Seems happy in low torque continuous use
Electrical connection are very easy to get to.
This motor had enough torque at 12 volts to spin the 8oz test weight at high rpm with some strain.
Comes with 4.9" plastic wheel.  This should provide lots of easy way to drive loads.
Easy to mount using 4 existing through holes in the gearbox.

CONs -
A bit noisy under load
RPM a bit high at rated 24 volts
Output shaft a bit short

Modifications -
I removed the wheel from the drive shaft.  I did this to demonstrate how easy it was to adapt the ouput shaft.  I used a U-bolt to attach the crank arm to the shaft.  For this test I ran the motor at 12 volts.  RPM at 12 volts is a bit high for a FCG but for a spider or other animation this motor at 12 volts should be a good choice.

The ideal solution would be to use a PWM module with this motor and 24 volts.  This will give you good torque over a wide RPM range.

Comments - I have not tried this yet, but repacking the gearbox with a heavy (wheel bearing) type grease should reduce the noise level.

Motor Test 4

 

Surplus Center #5-1754
http://www.surpluscenter.com/item.asp?item=5-1754&catname=electric 

Description

500 RPM 12 VDC GEARMOTOR

New, permanent magnet, right angle gearmotor. Cast aluminum gear housing with steel motor frame. Hollow square thru-drive output shaft. Two bolt rubber isolation mount. Two pin male integral Packard power connection (female half of plug not available from Surplus Center).

 

SPECS:

• Speed 500 RPM no load

• Speed 250 RPM at rated torque

• Voltage 12 DC

• Amperage 16 Amps

• Torque 8.5 in-lbs

• Rotation Reversible

• Duty Intermittent

• Mount 3/8" dia. two bolt on 2.2"centers

• Hollow Thru-shaft 5/32" (4 mm)

• Size 5-1/4" x 3-1/8" x 2-1/2"

• Shpg. 3 lbs.

Price for one - $13.99 Shipping for 1 - $11.98

Price for ten - $13.99 each Shipping for 10 - $24.51

 

PROS -

• Quiet
• High Torque
• Compact
• Good mounting points
• Electrical connection is relatively easy to get to. Will accept slightly modified push on crimp connectors
• This motor had enough torque to spin the 8oz test weight at high rpm without strain.

 

CONS -

• Shipping for a single unit is relatively expensive.
• Designed for intermittent use - See my comments below
• The output of this motor is via a square shaft or hollow shaft.
• High current requirements - I can't believe the posted spec.
• If you add a crank arm it can interfere with the electrical connections.

 

Modifications -

I cut away shroud over the electrical connection with a hacksaw.  Then it was easy to use spade connectors to wire the motor. 

 

I screwed/beat a 10-32 screw into the round half of the shaft and used Locktite hold it.  Then I cut off the head of the screw and ran a lock nut down the shaft.  I then tapped and threaded the crank arm the 10-32 shaft.

 

Comments -

While designed for intermittent use, I've left this motor running for hours under light load with no sign of heating up.  This motor requires at least 2 amps of current at 12 volts to run.

The metal of the OE shaft seems pretty hard and I was unable to thread the inside of the hollow shaft.

 

The high RPM of this motor means you'll probably need a PWM controller to reduce the speed.  Motor buzzes when PWM is used at low speed.

I really wanted this motor to be the new big thing.   It is going to take someone coming up with a better means of getting the output shaft connected to the prop than I've come up with.  The 2+ amp current requirement forces a bigger (more expensive) walwart or power source.

Still, in a group buy situation; this motor could easily power a flying crank ghost.  Figure $10 for the power supply, $16.50 for the motor, and $10 for the PWM controller, you get an easy to control prop motor for under $40

Unverified rumor has it that for larger orders you can contact them directly and they will work with you on the shipping cost.

 

Prop Motor Test Three

EBay.com Synchronous Motor

  

 

http://www.ebay.com/itm/260825295117?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Try searching on ebay.com for "synchronous motor 110"  This will get you a number of similar motors at various RPMs

Specs:

Dimensions:5cmX5cmX2cm
Shaft Diameter: 7m
Shaft Length: 15mm
Working Voltage: AC 100-127V
Frequency: ~50/60Hz
Power: 4W
Speed: 8R/MIN
CCW/CW

Weight: 0.9kgs

 

Price for one - $4.80 Shipping for 1 - $3.60
Price for ten - $4.80 each Shipping for 10 - $35.10

PROS -
Quiet
Inexpensive
Designed for continuous use

Electrical connection is very easy to get to.   Wire nuts will make the connections easy.
It is fairly easy to adapt an arm to the shaft arrangement.

Mounting is easy using the two exposed mounting tabs.

CONS -
Shipping for a single unit is relatively expensive.

Medium to low torque - This motor did not have enough torque to spin the 8oz test weight on a 6 inch arm. At max load (almost half way toward vertical) the motor reversed direction.

Modifications -
The output shaft is a smooth shaft with a perpendicular hole in it. I used the hollow threaded rod sold in the lamp department of home improvement store and drill a hole through the all-thread to match the hole in the output shaft.  I filled the hollow center of the threaded rod with hot melt glue and press the rod over the shaft.   I added a cotter pin through the holes.  The rod arm is secured between two nuts purcahsed in the lamp department.  Five dollars will buy you enough parts to modify 4 motors.

Comments - This motor functions like a stripped down reindeer motor.   My method of adding to the output shaft may cause problems in applications where the shaf and the rod must be totally co-linear.  This motor looks like a perfect candidate for a simple haunted Ouiji board.

 

Prop Motor Test Two

MonsterGuts.com  12VWM  Wiper Motor

 

 

http://monsterguts.com/index.php?act=viewProd&productId=4

 

A small wiper motor from an unidentified car in china.  Units are new and inspected by Monsterguts.com



Specs:

• 12 VDC has high and low speeds
• High Speed @ 12V: 53 r.p.m.
• Low Speed @ 12V: 38 r.p.m.
• High Speed @ 5V: 21 r.p.m.
• Low Speed @ 5V: 15 r.p.m.
• Working Torque - 3.98 foot pounds (5.4 N m)
• Static Torque - 13.27 foot pounds (18 N m)Full Load: 2000mA @ 12VDC, 1080mA @ 5VDC
• No Load: 1020mA @ 12VDC, 780mA @ 5VDC

Price for one - $16.49 Shipping for 1 - $13.55
Price for ten - $16.49 each Shipping for 10 - $45.03

PROS-
Relatively quiet
High torque
Designed for continuous use
Electrical connection is relatively easy to get to. Will accept push-on crimp connectors.
This motor had enough torque to spin the 8oz test weight at high rpm without strain.

CONS -
Shipping for a single unit is relatively expensive.

Modifications -
The output shaft has a splined tapered shaft and comes with a mounting nut. It was easy to drill a hole in the crank arm that was slightly undersized and use the nut to draw the arm onto the shaft. The connection was easy and secure.

Comments - This motor has plenty of torque for most props.   You'll need a PWM controller or need to run the motor at a lower voltage to keep the speed of motion down.  The motor buzzes when used with an inexpensive PWM controller.  For many applications this motor should be the go-to choice.  It is relatively inexpensive, is easy to mount, and adaptable.  

Unverified rumor has it that for larger orders you can contact them directly and they will work with you on the price and shipping cost.

RECOMMENDED with comments.

Prop Motor Test One

Surplus Center Item # 5-1767
SUV rear wiper motor assembly.

http://www.surpluscenter.com/item.asp?item=5-1767&catname=electric

New, right angle gear motor with reversing gear train to give back and forth sweeping motion. Originally for rear window of SUV. Could also be used for animated displays requiring similar movement. Integral park position switching.

Specs

• Speed 30 cycles/min.
• Voltage 12 DC
• Amperage 0.5 Amps
• Rotation Approximately 165 degree arc
• Duty Continuous
• Mount 2 angled tabs on bracket & threaded on shaft housing
• Shaft 0.393 dia. x 0.75" overall length. Tapered serrated section and male thread to attach wiper arm (not included)
• Size 7" x 7-1/2" x 4" 
• Shpg. 3 lbs.

Price for one - $19.99 Shipping for 1 - $11.98
Price for ten - $17.95 each Shipping for 10 - $24.51

PROS -
Quiet
High Torque
Designed for continuous use
Electrical connection is relatively easy to get to. Will accept slightly modified push on crimp connectors
This motor had enough torque to spin the 8oz test weight at high rpm without strain.
It is easy to adapt an arm to the shaft arrangement.

CONS -
Shipping for a single unit is relatively expensive.
Motor can not easily be removed from the mounting plate.  The gear train mounting is integral to the mounting plate.  Pull the plate and all the gears fall on the floor.

Modifications -
I cut away the wire for the parking connection.   So the parking function is undocumented.  The output shaft has a splined tapered shaft and comes with a mounting nut.   It was easy to drill a hole in the crank arm that was slightly undersized and use the nut to draw the arm onto the shaft.  The connection was easy and secure.

Comments - This motor waves the crank arm back and forth.  If you have need for this type of motion this motor would be a good choice.  You'll need a PWM controller or need to run the motor at a lower voltage to keep the speed of motion down.

Unverified rumor has it that for larger orders you can contact them directly and they will work with you on the shipping cost. 

RECOMMENDED with comments.

Prop Motor Test One

AllElectronics.com DCM-563

12VDC Right-angle gear head motor with worm drive.  Available in left hand too.

http://www.mpja.com/12VDC-78RPM-Motor-with-Right-Angle-Leadscrew/productinfo/19007+MD/ 
http://www.allelectronics.com/make-a-store/item/DCM-563/12VDC-RIGHT-ANGLE-GEAR-HEAD-MOTOR-WITH-WORM-DRIVE/1.html

Specs

• No-load rating: 180 RPM @ 12Vdc / 1.3A. Overall length, 144mm (5.66").
• Motor diameter, 49mm (1.91").
• 12mm diameter worm shaft is 89mm (3.55") long. The last 12mm of the shaft has a 6 x 1.0 reverse metric thread.
• Heavy gauge U-bracket on back of gearhead, 1/4" holes with 7mm spacing. 3/16" quick-connect terminals.
• Designed for power seat adjustment in automobiles. Also available with worm gear in opposite direction, CAT# DCM-697.

Price for one - $17.95 Shipping for 1 - 7.00
Price for ten - $17.95 each Shipping for 10 - $7.00

PROS -
Quiet
High Torque
Seller has good shipping policy
Good customer service
Seems happy in low torque continuous use
Electrical connection is relatively easy to get to.  Will accept slightly modified push on crimp connectors
This motor had enough torque to spin the 8oz test wieght at high rpm without strain.

CONs -
long output shaft with unusual thread.  Acme thread nuts are expensive (~$7.00 each)
Buzzes when used with  PWM (Pulse Width Modulation) controller.  More on PWM in a later post.
Shaft is hardened. making it difficult to cut or drill
Electrical connections can be in the same plane as the right angle crank

Modifications -
I cut away the plastic cover for the electrical connections by using a small hacksaw parallel to the body of the motor.  This made accessing the terminals easier but is not really necessary.

The output shaft was cut down using an abrasive cutting wheel and a Dremel tool.   I used a small U-bolt to attach the crank arm.   I'd also grind a flat side on the output shaft to prevent the arm from rotating on the shaft.

Comments - I really like this motor for the quiet operation and high torque.   A PWM controller is really needed for most applications.

RECOMMENDED with comments.