| ??? 06/27/06 07:44 Read: times |
#119176 - re: ramp and osc Responding to: ???'s previous message |
Hello again, sorry that I could not post any updates earlier
Jon Ledbetter said:
The motor is stalling, this may be too much of an increase at once. Try adding say 50 steps/sec on each increase. I did try that it still does not work, There should be a a sawtooth pattern of whatever chopping frequency you've decided to use. I would use around 20kHz, a 10k resistor and 5nF cap. Jon I have 22k resistor and 3.3nF capacitor connected to osc pin of L297. I have been told by the supplier of motor that in order to achieve higher rpm the operating voltage has to be increased with current being controlled. The logic is that on higher voltage, current rise and fall time is much quicker and steps could be generated on higher rate. But the problem I am facing is that as I increase the voltage and make it 24VDC the resistors connected in series with motor windings get really really hot within few seconds. I have reached to a point where I feel like giving up, any suggestions please regards James |
| Topic | Author | Date |
| alternative of L297 + L298 ?? | 01/01/70 00:00 | |
| datasheet | 01/01/70 00:00 | |
| motor drivers = Allegro | 01/01/70 00:00 | |
| You need to name your homepage | 01/01/70 00:00 | |
| homepage + 800 rpm | 01/01/70 00:00 | |
| Homepage | 01/01/70 00:00 | |
| Also, server is case sensitive | 01/01/70 00:00 | |
| 800RPM | 01/01/70 00:00 | |
| More details | 01/01/70 00:00 | |
| 1000 rpm | 01/01/70 00:00 | |
| Is this the right datasheet? | 01/01/70 00:00 | |
| re:check this out | 01/01/70 00:00 | |
| Trinamic | 01/01/70 00:00 | |
| IMS Drive | 01/01/70 00:00 | |
| THANKS | 01/01/70 00:00 | |
| Check this out | 01/01/70 00:00 | |
| LM18200 | 01/01/70 00:00 | |
| Just did 893 RPM with my new setup | 01/01/70 00:00 | |
| progress so far | 01/01/70 00:00 | |
| 10 ohm resistor | 01/01/70 00:00 | |
| re: 10 Ohm resistor | 01/01/70 00:00 | |
| Vsense resistor | 01/01/70 00:00 | |
| Or.... | 01/01/70 00:00 | |
| Ramping | 01/01/70 00:00 | |
| re:ramping | 01/01/70 00:00 | |
| ramp and osc | 01/01/70 00:00 | |
| re: ramp and osc | 01/01/70 00:00 | |
| resistors heating | 01/01/70 00:00 | |
| Ramping up the motor speed | 01/01/70 00:00 | |
Series Resistors | 01/01/70 00:00 |