I just purchased two soldered Tic T500 controllers to use with my pump motors (data sheet).
I read, and re-read the Tic user manual carefully (it’s a great manual btw!). However, whatever I do to try to run the motor results in motor barely moving while generating a lot of noise, grinding, skipping, etc.
Allow me to explain what I tried so far. My pump performance sheet says that it runs at 400 RPM continuously, 600 RPM intermittent. Two-phase four wire bipolar motor is 24V, 200 steps per revolution, and has max current per phase of 1.2A (data sheet linked above).
The first thing I do in Tic Control Center is to set the current limit to 1198mA at Full step, given that current per motor phase is 1.2A. This is below Tic’s limit of 1500mA and also my DC power supply can deliver more than twice this current so again I’m following the user manual guidelines.
Tic user manuals notes that speed settings are in units per 10,000 seconds. In my case, 400RPM and 200 steps per revolution = 1,333 steps per second. 1,333 x 10,000 = 13,333,333 is what I understand my max. speed setting is and that is what I input in Tic Control Settings as motor max. speed. I leave acceleration and deceleration at default values.
When I try to run the motor by clicking Resume, and either moving the slider or setting target velocity it starts misbehaving as noted above. I also tried leaving the max. speed at the default value of 2,000,000 (200.0000 pulses / s) and also increasing it to the maximum as noted in the manual, 500,000,000, but the problem persist exactly the same.
So what I finally tried in desperation was to lover the Current limit and the only thing that can make the motor rotate smoothly is lowering the current limit all the way down to 1mA. I’m quite confused by this but after realizing this I tried playing with Max speed and Current limit settings and it seems to me that it’s only the Current limit that controls the speed and not the Max speed setting. The issue is, at 1mA I am nowhere near the speed of 400RPM on the pump, and I also assume the torque.
The whole time Tic Control Center reports VIN voltage at 23.7-23.8V so I think that is OK. Also, I have two DC benchtop power supplies, two pumps and two Tic T500 controllers, and the same thing happens with every combination of the devices so I tried to eliminate hardware issues that way.
So please can anyone suggest what would be the way forward to pair the controller and the motor so my motor will run as designed? Thank you so much in advance, any advice is appreciated!