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New products: RoboClaw Solo 30A and 60A Motor Controllers
We are now carrying Ion Motion Control’s line of single-channel RoboClaws, the Solo 30A and Solo 60A. These versatile, high-power motor controllers have nearly all the same features and performance capabilities as their dual-channel 2×30A and 2×60A counterparts, just with one fewer motor channel. Just like the rest of the RoboClaw family, the Solos support a variety of interfaces, including USB serial, TTL serial, RC hobby servo pulses, and analog voltages, and integrated quadrature decoders enable closed-loop position or velocity control.
Unlike our selection of dual-channel RoboClaws, the Solos also feature a rugged, all-metal case that protects the driver while simultaneously serving as a heat sink, and they have four 12 AWG unterminated leads for supplying power and connecting a motor.
The following table shows our full updated offering of RoboClaw motor controllers:
Solo 30A |
Solo 60A |
2x7A |
2x15A |
2x30A |
2x45A ST 2x45A |
2x60A |
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Motor channels: | 1 | 2 | |||||
Operating voltage: | 6 V to 34 V | 6 V to 34 V | |||||
Continuous output current: | 30 A | 60 A | 7.5 A | 15 A | 30 A | 45 A | 60 A |
Peak output current: | 60 A | 120 A | 15 A | 30 A | 60 A | 60 A | 120 A |
5V BEC max current: | 1.2 A | 1.2 A (V5B or later) | 3 A | ||||
Size | 60 × 32.5 × 23.5 mm | 48 × 42 × 17 mm | 74 × 52 × 17 mm | 100 × 86 × 25 mm | |||
Weight: | 130 g | 18 g | 60 g | 295 g | |||
Price: | $89.95 | $119.95 | $114.95 | $129.95 | $169.95 | $191.95 | $199.95 |
New products: MP6500 Stepper Motor Driver Carriers
We are excited to expand our colorful selection of stepper motor drivers with carrier boards for the brand new MPS MP6500 stepper motor driver!
Monolithic Power Systems’ MP6500 can drive a bipolar stepper motor from a 4.5 V to 35 V supply with up to 1/8-step microstepping. On our four-layer, 2 oz copper carrier boards, the MP6500 can deliver up to approximately 1.8 A per phase continuously without a heat sink or forced air flow, making this new module the highest-current stepper motor driver we carry among all the ones that share this form factor.
14 March 2018 Update: After further testing of more units, our initial characterization of the maximum continuous current capability was too high, so we have lowered it to 1.5 A. Please keep in mind that the exact maximum current you can get out of the driver at a given temperature will depend on your supply voltage and stepper motor characteristics.
Unlike most other stepper motor drivers, the MP6500 features internal current sensing, which allows it to measure the motor’s coil current even during the off period of the PWM cycle. Combined with its automatic decay selection, this allows it to regulate the current especially accurately to produce smoother motion and higher speeds, as shown in the below oscilloscope capture from the MPS application note AN120 (1MB pdf).
Compare this with waveforms from a stepper driver that uses a more typical method of peak current control:
In addition to a version with potentiometer current control like most of our other stepper motor drivers, we also offer the MP6500 on a board with digital current control. This second version enables a microcontroller to dynamically set the current limit in steps of 0.5 A (up to a maximum of 2 A) by simply driving one or two inputs low. Alternatively, supplying an analog voltage or PWM signal allows finer control of the limit within the 0 to 2 A range.
Introductory special: just $2.97 each! Must use coupon code MP6500INTRO, limited to first 200 customers, limit 5 per customer.
Want to move heavy loads? We've got the linear actuator for you!
We have expanded our selection of Glideforce linear actuators from Concentric International to include their industrial-duty and medium duty series as steps up in power from their light-duty series that we have been offering for many years now.
The medium-duty actuators are available in five different stroke lengths ranging from 4″ to 12″ and with or without feedback potentiometers, and they have a dynamic load rating of 225 lb, which means they can handle twice the load of their light-duty counterparts:
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The industrial-duty actuators are real monsters compared to the medium-duty and light-duty units. The versions with an acme screw drive can handle dynamic loads up to 550 lb, and the versions with a ball screw drive (which is much more efficient than an acme screw) can handle dynamic loads up to a 1000 lb. Each drive option is available in six different stroke lengths ranging from 4″ to 24″ and with or without feedback potentiometers:
The following lets you compare all of our Glideforce linear actuator options:
Actuator Type |
Max Dynamic Load |
No-Load Speed @ 12 V |
Current Draw @ 12 V |
Nominal Stroke Length |
With Feedback | Without Feedback | Approx. Weight |
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Light-Duty (LD) |
15 kgf [34 lbs] |
4.4 cm/s [1.7″/s] |
1.2 A – 3.2 A |
4″ | LACT4P-12V-05 | LACT4-12V-05 | 1.3 kg |
12″ | LACT12P-12V-05 | LACT12-12V-05 | 1.6 kg | ||||
50 kgf [110 lbs] |
1.5 cm/s [0.57″/s] |
2″ | LACT2P-12V-20 | LACT2-12V-20 | 1.2 kg | ||
4″ | LACT4P-12V-20 | LACT4-12V-20 | 1.3 kg | ||||
6″ | LACT6P-12V-20 | LACT6-12V-20 | 1.4 kg | ||||
8″ | LACT8P-12V-20 | LACT8-12V-20 | 1.5 kg | ||||
10″ | LACT10P-12V-20 | LACT10-12V-20 | 1.5 kg | ||||
12″ | LACT12P-12V-20 | LACT12-12V-20 | 1.6 kg | ||||
Medium-Duty (MD) |
100 kgf [225 lbs] |
1.5 cm/s [0.58″/s] |
1.1 A – 4.6 A |
4″ | MD122004-P | MD122004 | 1.1 kg |
6″ | MD122006-P | MD122006 | 1.2 kg | ||||
8″ | MD122008-P | MD122008 | 1.3 kg | ||||
10″ | MD122010-P | MD122010 | 1.4 kg | ||||
12″ | MD122012-P | MD122012 | 1.5 kg | ||||
Industrial-Duty (ID) with Acme screw drive |
250 kgf [550 lbs] |
1.7 cm/s [0.66″/s] |
2.4 A – 13.2 A |
4″ | LACT4-500APL | LACT4-500AL | 4.2 kg |
6″ | LACT6-500APL | LACT6-500AL | 4.4 kg | ||||
8″ | LACT8-500APL | LACT8-500AL | 4.7 kg | ||||
12″ | LACT12-500APL | LACT12-500AL | 5.3 kg | ||||
18″ | LACT18-500APL | LACT18-500AL | 6 kg | ||||
24″ | LACT24-500APL | LACT24-500AL | 7 kg | ||||
Industrial-Duty (ID) with ball screw drive |
450 kgf [1000 lbs] |
1.7 cm/s [0.66″/s] |
2.4 A – 13.2 A |
4″ | LACT4-1000BPL | LACT4-1000BL | 4.6 kg |
6″ | LACT6-1000BPL | LACT6-1000BL | 4.9 kg | ||||
8″ | LACT8-1000BPL | LACT8-1000BL | 5.1 kg | ||||
12″ | LACT12-1000BPL | LACT12-1000BL | 5.6 kg | ||||
18″ | LACT18-1000BPL | LACT18-1000BL | 6.5 kg | ||||
24″ | LACT24-1000BPL | LACT24-1000BL | 7.4 kg |
Note that we are currently out of stock of many of the industrial-duty versions, but we will be getting more as Concentric makes them available. For units where the expected lead time is several months, we have disabled backorders; please contact us if you are interested in placing an order now for one of those units.
To see all of our linear actuators, visit our linear actuator category.
Closed December 25 and January 1
We will be closed for Christmas on Monday, December 25 and for New Year’s Day on Monday, January 1. Orders placed after 2 PM Pacific Time on December 22nd or 29th will be shipped on the following Tuesdays.
And last call for our Christmas sale — only about 15 hours to go!
Merry Christmas and happy New Year!
(A Little More Than) Twelve Days of Christmas Sale
If you missed our Black Friday sale or realize you didn’t quite get everything you wanted, don’t fret: we have all active Pololu-brand and PCX products on sale for 12% off, and we are offering 20% off twelve broad categories of our products. The sale runs through noon PST on Friday, December 22, but be careful to order early for delivery before Christmas. Save on your Christmas shopping, or stock up now on robot parts for the new year. Check out the sale page for all the discounts and coupon codes. Merry Christmas!
Our 20D gearmotors with long-life carbon brushes are now available with extended motor shafts
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Last month when we introduced versions of our 20D gearmotors with long-life carbon brushes, we mentioned units with extended motor shafts were in the works. Well, I’m happy to announce that option is now available for both the 12V CB and 6V CB 20D gearmotors, making it possible to use them with encoders like our magnetic encoder kit. The following table shows our full selection of 20D gearmotors, which has now grown to 72 options:
Rated Voltage |
Brush Type | Stall Current @ Rated Voltage |
No-Load Speed @ Rated Voltage |
Approximate Stall Torque @ Rated Voltage |
Single-Shaft (Gearbox Only) |
Dual-Shaft (Gearbox & Motor) |
---|---|---|---|---|---|---|
12 V | long-life carbon (CB) |
1.6 A | 570 RPM | 26 oz-in | 25:1 12V CB | 25:1 12V CB dual shaft |
450 RPM | 33 oz-in | 31:1 12V CB | 31:1 12V CB dual shaft | |||
225 RPM | 58 oz-in | 63:1 12V CB | 63:1 12V CB dual shaft | |||
180 RPM | 75 oz-in | 78:1 12V CB | 78:1 12V CB dual shaft | |||
140 RPM | 85 oz-in | 100:1 12V CB | 100:1 12V CB dual shaft | |||
110 RPM | 110 oz-in | 125:1 12V CB | 125:1 12V CB dual shaft | |||
90 RPM | 130 oz-in | 156:1 12V CB | 156:1 12V CB dual shaft | |||
72 RPM | 160 oz-in | 195:1 12V CB | 195:1 12V CB dual shaft | |||
57 RPM | 200 oz-in | 250:1 12V CB | 250:1 12V CB dual shaft | |||
45 RPM | 250 oz-in | 313:1 12V CB | 313:1 12V CB dual shaft | |||
36 RPM | 290 oz-in | 391:1 12V CB | 391:1 12V CB dual shaft | |||
29 RPM | 350 oz-in | 488:1 12V CB | 488:1 12V CB dual shaft | |||
6 V | long-life carbon (CB) |
2.9 A | 590 RPM | 22 oz-in | 25:1 6V CB | 25:1 6V CB dual shaft |
470 RPM | 28 oz-in | 31:1 6V CB | 31:1 6V CB dual shaft | |||
230 RPM | 54 oz-in | 63:1 6V CB | 63:1 6V CB dual shaft | |||
190 RPM | 62 oz-in | 78:1 6V CB | 78:1 6V CB dual shaft | |||
150 RPM | 72 oz-in | 100:1 6V CB | 100:1 6V CB dual shaft | |||
120 RPM | 87 oz-in | 125:1 6V CB | 125:1 6V CB dual shaft | |||
93 RPM | 110 oz-in | 156:1 6V CB | 156:1 6V CB dual shaft | |||
75 RPM | 130 oz-in | 195:1 6V CB | 195:1 6V CB dual shaft | |||
60 RPM | 170 oz-in | 250:1 6V CB | 250:1 6V CB dual shaft | |||
46 RPM | 220 oz-in | 313:1 6V CB | 313:1 6V CB dual shaft | |||
37 RPM | 260 oz-in | 391:1 6V CB | 391:1 6V CB dual shaft | |||
30 RPM | 310 oz-in | 488:1 6V CB | 488:1 6V CB dual shaft | |||
6 V | precious metal |
2.9 A | 590 RPM | 22 oz-in | 25:1 6V | 25:1 6V dual-shaft |
470 RPM | 28 oz-in | 31:1 6V | 31:1 6V dual-shaft | |||
230 RPM | 54 oz-in | 63:1 6V | 63:1 6V dual-shaft | |||
190 RPM | 62 oz-in | 78:1 6V | 78:1 6V dual-shaft | |||
150 RPM | 72 oz-in | 100:1 6V | 100:1 6V dual-shaft | |||
120 RPM | 87 oz-in | 125:1 6V | 125:1 6V dual-shaft | |||
93 RPM | 110 oz-in | 156:1 6V | 156:1 6V dual-shaft | |||
75 RPM | 130 oz-in | 195:1 6V | 195:1 6V dual-shaft | |||
60 RPM | 170 oz-in | 250:1 6V | 250:1 6V dual-shaft | |||
46 RPM | 220 oz-in | 313:1 6V | 313:1 6V dual-shaft | |||
37 RPM | 260 oz-in | 391:1 6V | 391:1 6V dual-shaft | |||
30 RPM | 310 oz-in | 488:1 6V | 488:1 6V dual-shaft |
Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. In order to avoid damaging the gearbox, we recommend keeping continuously applied loads under 50 oz-in (3.5 kg*cm) for the versions with precious metal brushes and under 70 oz-in (5 kg-cm) for the versions with carbon brushes (the ones with “CB” in the name). Stalls can also result in rapid (potentially on the order of a second) thermal damage to the motor windings and brushes, especially for motors like this that can deliver a lot of power for their size; a general recommendation for brushed DC motors is to limit continuous current to approximately 25% of the stall current.
Black Friday deals keep coming from Pololu and from Adafruit
Our Black Friday/Cyber Monday Sale is nearing the halfway point; thank you to all of those who have already ordered! Today’s doorbusters are gone, but the rest of the daily specials are still active, and a lot more great deals are still coming your way, including the weekend deals we just released. We’re not doing any doorbusters Saturday and Sunday, just lots of extra discounts on big categories, so take your time looking around.
The weekend deals include two items we have never had on sale before: smart servos from XYZrobot and a 6DOF robot arm based on those servos. We recently released an Arduino library for the A1-16 smart servos and arm, making them especially easy to expand beyond their preconfigured sequences for use in your own advanced projects.
Our doorbusters will return starting at 6 AM on Cyber Monday, and rumor has it that might be a prime opportunity to snag one or two of our new Balboa balancing robots!
By the way, our friends at Adafruit are having their own Black Friday sale this weekend, with 15% off their entire catalog and 20% off their Feathers and accessories, plus free items for orders over certain amounts. You can find all the details on the Adafruit blog.
New 20D gearmotors available with 12 V windings and with long-life carbon brushes
We love motors here at Pololu, and we are committed to offering you the best selection so that you can find just the right drive solution for your project. Our latest efforts have gone into expanding our selection of 20D gearmotors to include 12 V versions, which have approximately the same performance at 12 V as our 6 V versions do at 6 V, just with half the current draw. This in turn enables the use of lower-current (and typically lower-cost) motor drivers in applications with access to higher voltages.
Additionally, we noticed that our original 6 V versions do not last as long as we would like in some applications, so we made these new 12 V versions with long-life carbon brushes instead of precious metal brushes, and we released new versions of our 6 V motors with long-life carbon brushes as well. These versions have “CB” in their names, and they can be differentiated from versions with precious metal brushes by their copper-colored terminals.
20D mm metal gearmotor precious metal brushes (left) next to 20D 6V CB and 12V CB long-life carbon brushes. |
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Please note that making the brushes more robust can just move the failure point to the windings or gears if you try to push the motors too hard, but if you use them around their nominal voltages and keep the continuous load low (under around 20% of the stall torque or 1 kg-cm, whichever is lower), the carbon brushes allow the motors to last several times longer than versions with precious metal brushes.
Changing the brushes does affect the performance in ways beyond lifetime (e.g. the starting voltage is generally a little higher with the carbon brushes), so we are continuing to offer precious metal versions of our 6 V motors for now, but we might phase those out in the future. Please contact us or post a comment below if continued availability of the precious metal versions is important to you.
Currently, only the 6V versions with precious metal brushes are available with a rear motor shaft that can be used to add an encoder, like our magnetic encoder for 20D mm metal gearmotors, but the 6V CB and 12V CB motors should be available with this rear shaft option by the end of November.
With the addition of these new units, our selection of 20D gearmotors now spans nearly fifty options:
Rated Voltage |
Brush Type | Stall Current @ Rated Voltage |
No-Load Speed @ Rated Voltage |
Approximate Stall Torque @ Rated Voltage |
Single-Shaft (Gearbox Only) |
Dual-Shaft (Gearbox & Motor) |
---|---|---|---|---|---|---|
12 V | long-life carbon (CB) |
1.6 A | 570 RPM | 26 oz-in | 25:1 12V CB | |
450 RPM | 33 oz-in | 31:1 12V CB | ||||
225 RPM | 58 oz-in | 63:1 12V CB | ||||
180 RPM | 75 oz-in | 78:1 12V CB | ||||
140 RPM | 85 oz-in | 100:1 12V CB | ||||
110 RPM | 110 oz-in | 125:1 12V CB | ||||
90 RPM | 130 oz-in | 156:1 12V CB | ||||
72 RPM | 160 oz-in | 195:1 12V CB | ||||
57 RPM | 200 oz-in | 250:1 12V CB | ||||
45 RPM | 250 oz-in | 313:1 12V CB | ||||
36 RPM | 290 oz-in | 391:1 12V CB | ||||
29 RPM | 350 oz-in | 488:1 12V CB | ||||
6 V | long-life carbon (CB) |
2.9 A | 590 RPM | 22 oz-in | 25:1 6V CB | |
470 RPM | 28 oz-in | 31:1 6V CB | ||||
230 RPM | 54 oz-in | 63:1 6V CB | ||||
190 RPM | 62 oz-in | 78:1 6V CB | ||||
150 RPM | 72 oz-in | 100:1 6V CB | ||||
120 RPM | 87 oz-in | 125:1 6V CB | ||||
93 RPM | 110 oz-in | 156:1 6V CB | ||||
75 RPM | 130 oz-in | 195:1 6V CB | ||||
60 RPM | 170 oz-in | 250:1 6V CB | ||||
46 RPM | 220 oz-in | 313:1 6V CB | ||||
37 RPM | 260 oz-in | 391:1 6V CB | ||||
30 RPM | 310 oz-in | 488:1 6V CB | ||||
6 V | precious metal |
2.9 A | 590 RPM | 22 oz-in | 25:1 6V | 25:1 6V dual-shaft |
470 RPM | 28 oz-in | 31:1 6V | 31:1 6V dual-shaft | |||
230 RPM | 54 oz-in | 63:1 6V | 63:1 6V dual-shaft | |||
190 RPM | 62 oz-in | 78:1 6V | 78:1 6V dual-shaft | |||
150 RPM | 72 oz-in | 100:1 6V | 100:1 6V dual-shaft | |||
120 RPM | 87 oz-in | 125:1 6V | 125:1 6V dual-shaft | |||
93 RPM | 110 oz-in | 156:1 6V | 156:1 6V dual-shaft | |||
75 RPM | 130 oz-in | 195:1 6V | 195:1 6V dual-shaft | |||
60 RPM | 170 oz-in | 250:1 6V | 250:1 6V dual-shaft | |||
46 RPM | 220 oz-in | 313:1 6V | 313:1 6V dual-shaft | |||
37 RPM | 260 oz-in | 391:1 6V | 391:1 6V dual-shaft | |||
30 RPM | 310 oz-in | 488:1 6V | 488:1 6V dual-shaft |
Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. In order to avoid damaging the gearbox, we recommend keeping continuously applied loads under 50 oz-in (3.5 kg*cm) for the versions with precious metal brushes and under 70 oz-in (5 kg-cm) for the versions with carbon brushes (the ones with “CB” in the name). Stalls can also result in rapid (potentially on the order of a second) thermal damage to the motor windings and brushes, especially for motors like this that can deliver a lot of power for their size; a general recommendation for brushed DC motors is to limit continuous current to approximately 25% of the stall current.
Free Circuit Cellar magazine October 2017
Get a FREE copy of Circuit Cellar magazine’s October 2017 issue issue with your order, while supplies last. To get your free issue, enter the coupon code CIRCUIT1017 to your shopping cart, or click the link. The magazine will add 6 ounces to your order weight when calculating your shipping options.
For back issues and more information, see our free Circuit Cellar magazine offers.
1″ (2.5 cm) and 2″ (5 cm) premium jumper wires and wires with pre-crimped terminals
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Our popular premium jumper wires and wires with pre-crimped terminals are a convenient way to make quick, neat connections to 0.1″ (2.54 mm) connectors and solderless breadboards, and they are now available in shorter 1″ and 2″ lengths. Each new length is available in three gender combinations (female-female, male-female, and male-male) and seven color combinations:
- black 10-pack
- red 10-pack
- yellow 10-pack
- green 10-pack
- blue 10-pack
- white 10-pack
- multi-color 60-pack (10 each of all six colors)
Our wires with pre-crimped terminals work with our 0.1″ crimp connector housings to make custom cables with the pin arrangement of your choosing. You can easily make cable harnesses or assemblies that branch from one connector on one side to multiple connectors on the other, and you can also cut off one pre-crimped end and solder the wires directly to components to make swapping connections easy:
The premium jumper wires are just wires with pre-crimped terminals that have 1×1 crimp connector housings already installed over the crimp pins.
You can use the following selection boxes to get to a specific pack of premium jumper wires:
Alternatives available with variations in these parameter(s): gender length color Select variant…
and you can use the following selection boxes to get to a specific pack of wires with pre-crimped terminals:
Alternatives available with variations in these parameter(s): gender length color Select variant…