1 axis tb6560 any good?

[John S]

I have 3 of these but not tried them yet.
They were bought for a very simple application so I'm hoping they will be OK.

Only problem I can see at the moment is they need 5V and return step and direction to the controller.
My application sends step and direction out at 5v and returns to ground.

Being a big hammer man as opposed to MiG welding IC's onto circuit boards i believe you can reverse this with pull up / down resistors ?

[irving2008]

I have 3 of these but not tried them yet.
They were bought for a very simple application so I'm hoping they will be OK.

Only problem I can see at the moment is they need 5V and return step and direction to the controller.
My application sends step and direction out at 5v and returns to ground.

Being a big hammer man as opposed to MiG welding IC's onto circuit boards i believe you can reverse this with pull up / down resistors ?

Sadly John, no you can't, you need something active to provide a pull down rather than a pull up. However all is not lost, is it possible for your application to invert the sense of the signal, i.e. be normally high and go low for the pulse? If not, you need a simple Inverter circuit. If you need something like that drop me a PM.

[boldford]

I have 3 of these but not tried them yet.
They were bought for a very simple application so I'm hoping they will be OK.

Only problem I can see at the moment is they need 5V and return step and direction to the controller.
My application sends step and direction out at 5v and returns to ground.

Being a big hammer man as opposed to MiG welding IC's onto circuit boards i believe you can reverse this with pull up / down resistors ?

Yeah. I hope this one's going to be OK too.
This one seems to repeat the error of deriving the 5v supply from the motor supply. It appears the TB6560AHQ is easily smoked if the motor voltage is applied before the 5v has settled or removed before the 5v is removed.

I suspect the design may be using the optos connected active low to alleviate their slew rate problems rather than using a Schmitt Trigger. At this stage it seems the I/P and driver are completely opto-isolated.

More to follow after I get some juice on it.

[boldford]

. . . . .It appears the TB6560AHQ is easily smoked if the motor voltage is applied before the 5v has settled or removed before the 5v is removed. . . . . . . ..

Important Typo Alert
What I should have typed is as follows "It appears the TB6560AHQ is easily smoked if the motor voltage is applied before the 5v has settled or remains after the 5v is removed

[boldford]

I have 3 of these but not tried them yet.
They were bought for a very simple application so I'm hoping they will be OK. . . . .

Having begun my investigation I must give my first words of warning. This tip may apply to any of these monolithic drivers from any vendor; domestic or overseas.
To check out the reverse side of the board it was necessary to remove it from the (reasonably proportioned) heatsink. Unfortunately I found just the barest smear of heat conductive compound where the TB6560 is fixed to the heatsink. I would recommend anyone buying ready made drive units to check this and, if necessary, apply enough to get maximum thermal bonding. The thermal compound costs pennies yet might save you pounds and all the hassle of down-time.