Stepper based machine some general questions
- timo
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04 Jan 2025 08:31 - 04 Jan 2025 14:53 #318029
by timo
Stepper based machine some general questions was created by timo
I finally got around to start putting wires on the MESA card. Now I came across some questions that may have simple answers.
1. Do I need to wire up the enable inputs on the stepper drivers?
1. Do I need to wire up the enable inputs on the stepper drivers?
- motors work fine without enable lines.
- driver reduces current to half when the motor is not moving; so no heat issue.
Is there anything that I overlook that would make it adviseable to add this wiring?
1.1. The 7i76 does not have an "enable Pin" on the step generator. So I then need to hook up enable to any normal I/O?
2. I noticed that I can get a higher top speed when I reduce the accelleration and at lower top speed I can put in higher accelleraton values.
For a small bench top mill should I rather focus on acceleration with lower top speed?
3. Is it possible to generate a 4th axis in PNC config? I did not find it yet. Maybe someone can point me in the right direction. Do I have to add this manually to the HAL file?
No idea why I could not make it work yesterday. Answers to 3. are: Yes it works with pncconf and NO manual adding it to hal from scratch is not required. I just tried fresh again. Choose XYZA configuration and everything was fine.
Last edit: 04 Jan 2025 14:53 by timo.
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- tommylight
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04 Jan 2025 14:57 #318079
by tommylight
1. No, it will do just fine without, if you do not plan to move it manually
1.1. Yes
2. Don't, just don't! Set the machine up, make it work with very low values, then you can decide what is better for you after you get some experience.
3. Yes, on the third page choose XYZA
Replied by tommylight on topic Stepper based machine some general questions
1. Do I need to wire up the enable inputs on the stepper drivers?
1.1. The 7i76 does not have an "enable Pin" on the step generator. So I then need to hook up enable to any normal I/O?
2. I noticed that I can get a higher top speed when I reduce the accelleration and at lower top speed I can put in higher accelleraton values.
For a small bench top mill should I rather focus on acceleration with lower top speed?
3. Is it possible to generate a 4th axis in PNC config? I did not find it yet. Maybe someone can point me in the right direction. Do I have to add this manually to the HAL file?
1. No, it will do just fine without, if you do not plan to move it manually
1.1. Yes
2. Don't, just don't! Set the machine up, make it work with very low values, then you can decide what is better for you after you get some experience.
3. Yes, on the third page choose XYZA
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- timo
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05 Jan 2025 08:35 #318150
by timo
Replied by timo on topic Stepper based machine some general questions
Thank you for the answers.
This keeps things easier, "problems solved" so far. Next up is to hook up the spindle drive.
Greetings Timo
This keeps things easier, "problems solved" so far. Next up is to hook up the spindle drive.
Greetings Timo
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