DSPIC SERVO DRIVER

I am hoping that perhaps additional analog filtering or digital filtering of the analog command will solve this problem. August 13, at Wich one you like the best. November 11, at I actually got the servodrive working, in the sense that it was spinning the motor, a few weeks ago but did not have time to blog about it then. The new design uses 2 op-amps as an h-bridge. The deadband parameter is the number of encoder counts the servo can be out of position without the servo loop taking any corrective action.

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July 6, at I've dslic a heatsink and a fan, probably meant for a P4 processor, which means I can run the drive as long as I want without overheating the powerstage - at least for now when there is no load on the motor. The single sided circuit board can be etched or if you have a milling machine, these boards can be milled using the pcb-gcode.

This is used to detect crashes and jammed axis or input command conditions beyound the capabilities of the motor. Tags for this Thread keepnotsince. There is no current-feedback in the drive yet, only overcurrent protection which will shutdown the drive at the rated current.

I might do a video if the servo running positioning the actuator if anyone is interested?? Hmmm well ok The only other thing apart from analog featurs, yep I could think of, about INT0, would be it being remappable but. This can be set as low as 2 us or 5khz servo rate to as high as 0.

First Steps With Brushless Servodrive (Microchip dsPIC + IRF IRAMS) –

The serial port runs at a fixed baud rate of N David Winter November 10, at Since the low speed velocity estimation is very annoying. After this number is changed, you must power down the servo card and restart it to make the rate change.

Great effort, I was interested in your comment of how noisy the Irams units are. Thank you in advance. Dear Mike Thank you so much for taking the time to read through my post. Jitesh June 24, at Dave, some notes, text, and a HAL file for my jogwheel now at: July 25, at Learn how your comment data is processed. Hi Lawrence, There are now two more pics with the schematic and the pcb for the powerstage.

DC Servo Positioner using 33FJ32GP | Microchip

I actually got the servodrive working, in the sense that it was spinning the motor, a few weeks ago but did not have time to blog about it then. Forums Posts Latest Posts.

When I did the experiments in the previous post I noticed the sqaure wave moves slighty by a couple of uS as the demand changes and the actuator moves to a new position.

The board is interfaced to the PC through 2 pins of a parallel port.

DC Servo Positioner using 33FJ32GP202

This 33FJ32GP can compute the loop in 8us the difference is phenomenal meaning the 33F part is far superior and is so fast it rivals the performance of an analogue positioner card. John, looks pretty good.

Wich one you like the best. I'll try to dig out the jog-wheel HAL for you and post it here as a comment.

Project Description

The servo loop of the drive attempts to keep these 2 numbers as close as possible to each other. Hi Jitesh, The schematics, PCB, and software for Mk2 of the servodrive will be available when I have had to improve the software to do sinusoidal commutation and test that it really works well sdpic EMC and the Mesa servocard.

The serial programming interface is used to tune the PID and other servo loop parameters to optimize the performance in a particular application. Noel August 4, at You will need to check what voltage your motors are rated for and build a powersupply accordingly. August 21, at ADCS to accommodate the shorter Tcy.