Basic configuration of TMCM-090 and BB-3

[Ralph]

I am trying to set up a TMCM-090 with a BB-035 in step and direction mode and much like the earlier post and not having any success.

Here are my settings:

X1 Pin1 jumped to GND no other connections on this header

I am trying to set it for Rhomb F max force so my jumpers are set in the following manner:
SPE - jumper removed

SDE- jumper present

S16- jumper present

UMD- jumper present

ANN- jumper removed

64U-jumper removed (why is this jumper not shown in manual? I believe it is pin 27 on the TMCM-090 that needs to be high for step and direction?)

All other jumpers removed

I have a red blinking LED on the upper left corner of the TMCM-090. The frequency of the LED changes. It was blinking on 10 seconds, off 10 and so forth. Now it is blinking at about 2 hz with a 50% duty cycle.

What is the significance of this LED and the blink rate?

I am hooked up to a power supply that is giving 48 volts and the BB and TMCM are drawing .05 Amps. Sometime it goes up to .07 amps.

I have single ended step and direction wired to the S+ and D+ lines and S- and D- grounded. I have verified the controller is putting out the step and direction. I have tried both high going pulses and low going with no effect. My pulse train has a 50% duty cycle so a 1khz. pulse train has a pulse width of 50 micro seconds. I believe this is within your spec even at the highest pulse rate.

Does the drive prefer high going or low going pulse trains for step?

I have a Piezo Motor Legs motor hooked up to the drive per the manuals instruction.

When I give it a pulse train, I don't see the current going to the unit increase nor do I hear any noise like the motor is trying to move. What current should I see if the motor were trying to move?

Any suggestions would be appreciated. I am 8 hours into what I thought would be a very easy intergration without any success.

Ralph

[Olav Kahlbaum (TRINAMIC)]

The pulses that the TMCM-090 accepts as step pulses must be low-to-high transitions. Your pulse frequency is within the specifications.
You can leave the S- and D- lines open. On the BB they are terminated in such a way that single ended signals can be connected just to the S+ and D+ lines, leaving S- and D- open.

Have you closed the ENN jumper? I think that you have a version of the TMCM-090 where this input must be pulled low to enable operation of the module.

[Ralph]

Thank you for your response.

I believe I do have the ENN grounded. This is pin 1 on the X1 header correct?

If you could provide answers to my other questions:

What is the LED signalling and is it normal for it to be changing frequency?
What is the normal current draw when at standstill and while moving?

I still an not sure why this is not working.

[Olav Kahlbaum (TRINAMIC)]

Hello Ralph,
you can verify that the piezo motor and cable is OK by disconnecting from driver and measure the 0.5 µF capacitance between each phase and Gnd.

Driver blink period is 2 sec. A bad Gnd connection between BB35 and external controller could perhaps play some tricks?

Current consumption for BB-301 with only one TMCM-090 is 50 mA when standing still, supposedly equal to BB-035. Extra current for running piezoLEGS with a classic output stage is 0.1 mA per wfm Hz (Power P=4fCUU and I=4fCU). Using 1 kHz microstepping and RhombF, the current should be 50..63 mA depending on the resolution.