TB6560HQ-Stepping Motor Driver IC 3.5amp

[gustave_homme]

Good evening,

Lucas i have a question about your schematic, R7,8,9 are look to have a value of RES2, how do you determine the value of the resitors?

Good job on your PCB by the way.

Thanks for your help Dan

[lucas]

Dan,

thats not my schematic.

Attached is the one I am using on 2 machines (ver 1).
I have the optocouplers on the BOB.

Regards,
Luc.

[ggg]

I just replaced them with the "non hissing ones" without changing anything else and it's dead silent.

So I need to find non-inductive ones, a quich search at different suppliers wasn't succesfull, they are either too big (3W) or SMD ones wich are just underrated.
Anyone knows a good supplier?

Could any body tell me if there is any possibilitie to add any type of Vref in orther not to chage the 2 Rsences any time I want to use diferent motor current ? As have Allegro (sanken) or ST Ic's.Like PIN 10 in TA8435HQ

[ggg]

Could anyone tell me if there is any possibilities to add any type of Vref in order not to change the 2 Rsences any time I want to use different motor current ? As have A3986, L297 or TA8435HQ ( PIN 10 ) IC's

[lucas]

Sorry for the late reply.

The absence of a Vref input is indeed a disadvantage for this chip.
It's very big advantage is the price: 4.2 US$ for a 1/16th microstepping chip at digikey.com.

But you can use the 2 torque inputs to reduce the current output.

I didn't have issues with this, the drivers were build to match the motors when building a machine, if stronger motors are needed after tests then indeed the resistors have to be altered, however this is quite easy compared to the motor change, mechanical changes, bigger power supply etc...

One option isn't possible: one driver cabinet for different machines like you can do with Gecko's where the current resistor is incorporated in the motor cables.

[pminmo]

The TBQ6560 is a nice little chip, I've been pleased with how it performs. Yes it suffers from being less flexible on setting currents. One point I would make, it's very important to use a low esr capacitor on VM, and a decoupling capacitor very close to the chip for VM supply pins.

[lucas]

Phil,

do you have pictures of your design using this chip?

PCB layout for this one isn't really easy.

I have used SMD (low inductive) current sense resistors on my latest build and the motors are dead silent. They are 0.5 ohms each and the pcb has 3 locations for each coil, so installing one resistor gives a 1 Amp drive, 3 makes a 3 amp drive.

Regards,
Luc.

[pminmo]

Here is one version. Sense resistors are on the bottom of the pcb. SMD 2515 2W.

[pminmo]

The other:

[lucas]

I like the plugin type of the Naos. Looks like a G250/G540 style of setup.

At what voltages and currents have you tested these chips?

Did you also "intentionally" forgot the power-up and down sequence mentioned in the datasheet?

Nice work.

Regards,
Luc.

PS: I still should have a bunch of soldercup DB25's left over from my mini and mainframe computer service time ages ago, these can be mounted easily with the PCB between the pins.
So you gave me a new idea for an easy configuration...

[pminmo]

Yes I did intentionally skip the "recommended" sequencing, kind of, Enable and reset are sequenced. Since there is no timing spec on the Vdd to VMA sequence, I decided to build it and see if there are any issues. So far no problems.

[jalessi]

Phil,

Do you sell any of these as kits?

How is the performance?

Any Video?

Jeff...