h-bridge stepper motor no working (many because it is not getting enough power)

So i have a H Bridge and a 1.8 Size 20mm High Torque Hybrid Stepping Motor AC Motor, DC Motor from China Manufacturers - Changzhou Songyang Yunhao Trade Co., Ltd. page 1. and i am powering it with a
SH-DC12V300 Adaptor
230-240v ac 50Hz
12v dc 300mA Q060122
made in china type 1
which goes into the h-bridge
the problem is that the motor while working is not strong enough to do anything and i need it to life up a bit which should be able to do. When it is put under stress it makes a noise like a grating and slows down. My thought id that it is not receiving enough power can any one give me some help. :slight_smile:

HBRIDGE-stepper_large.jpg

Any information (link to) that "shield"?
It looks like there is a terminal pair which may be [an inlet] for an "external supply" (like that wall-pack or a battery pack)?
Is it running from 5V or 12V?
If it's the 5V then it would wheeze.

The Shield is 2-Channel H-Bridge Motor Driver (link) 2 Channel H-Bridge Motor Driver Shield for Arduino | Freetronics

OK.
That's some good info.
Try and be more forthcoming with the details, JPB.

The picture that you attached originally is the picture from the link.
Is that exactly as you have yours set up?

So, you have the widget placed on the “Bridge VIN To Motor Power”?
You have the "current limit to 0.6A, 1.2A, or 2A for each channel using the switches on the shield"? Set to which?

What is the labelled rating of your wall-pack (assuming you're using one)?

12v dc 300mA Q060122
made in china type 1

That sort of current is way too small to provide you with much power. That is the limiting factor at the moment.

No that is not what i have done (see below for a picture of what i have) the current is set to 0.6A

What is the labelled rating of your wall-pack (assuming you're using one)?

?

The energy pack of the h-drive that i am using

You have two windings rated at 0.6A (or 0.8A depending on exact motor), and you try to drive
both from 0.3A supply. So yes it is not getting enough power (and you are overloading the
power supply).

Also the windings are rated at 4V or so, so a ~5V supply would be needed (allowing for 0.5 to 1V loos in the
driver chip)

JustPassingBy:
No that is not what i have done (see below for a picture of what i have) the current is set to 0.6A

You can have the current set on the driver to 0.6A but if your power supply is incapable of supplying that much then it is not going to delver what you set it to.
Remember that 0.6A is 600mA and your supply can only deliver 300mA. And as MarkT points out that 600mA is for just one of the two coils the motor has, so you need a supply capable of at least 1200mA or 1.2A.

okay so looks like i need to get a stronger power supply
thanks :slight_smile: