Duet Giving more Pulse in Drive 7
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M569 P7 S1 R1 T1
When i am giving command G1 X10 F3000
Duet should give 3200 pulse in particular pin but it is giving 3280 or 3287 or 3300 every time different.We are checking this pulse input in servo driver. servo driver gets more.
Regards,
Kishan -
How are you counting the pulses?
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We are using Fuji Servo Drive and Servo Motor.
Fuji Drive has functionality that, it can show how many pulse it is getting. -
Perhaps you have the step pulse time configured too short so that you are not getting an accurate count.
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what should be the standard T value ?
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I think it is not counting problem, duet actually gives more pulses, my print is getting failed due to inaccurate positioning.
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Look up the specification on the datasheet for the drivers. The T parameter controls the step pulse width, the interval between step pulses, and the setup time from direction to step. So pick the longest of those 3 from the datasheet.
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There is no Specification of pulse width in drivers, confirmed with Fuji Technical.
you can give any pulse width to Fuji Driver it can recognize and run.As per your knowledge what should be the T Parameter or how to resolve this issue ?
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I'm sorry, that is not true. Every stepper driver has a minimum pulse width, and a minimum direction signal setup time.
Try T10 and if that solves the problem, you can then try reducing it.
Some stepper drivers don't like the DIR signal to be changed before a step pulse has finished, so in release 1.21RC3 we avoid doing that for drivers with a nonzero T parameter, at the expense of maximum achievable speed.
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We are using Fuji Servo Drivers and Servo Motors.
by doing T Value 10, we got some 3560 Pulses, checked 3 times its give more pulses.
We have changed drives also from Drive 7 to Drive 6
but it is not resolving -
Is the 3560 pulses always the same (for the same amount of movement commanded?) If it varies then you could have excessive noise on the link between the Duet and the Fuji Servo. I note that you asked in another thread about 5V logic. Can you post a link to the datasheet to the Fuji servos.
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Not every time 3560 pluses, it varies but generally it gives more than 3200.
Refer this link below,
http://www.fujielectric-europe.com/gallery/download/download_406/alpha5_smart_user_s_manual_english_24c7_e_0016c.pdf -
I think it should not be the noice Problem,
Because Pulses doesn't change in ideal condition of machine, it remains steady until we give command. -
How are you driving the servo amplifier from the Duet: are you using the external stepper driver breakout board?
