Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: Eyport on May 13, 2017, 06:46:47 PM

Title: Step pulse
Post by: Eyport on May 13, 2017, 06:46:47 PM

Hi,

I want increase the step pulse to 60us. I tried to activate "Sherline mode" but the maximum step pulse is 40us. Could you give me the different step for increase the step pulse please.

Thank you

Title: Re: Step pulse
Post by: ger21 on May 13, 2017, 07:27:07 PM

I don't believe that you can.

Title: Re: Step pulse
Post by: joeaverage on May 16, 2017, 03:04:14 AM

Hi,
I think Ger is right, you cannot program Mach to produce a 60us pulse.

You could make a circuit to do so if you wish. It would require one IC timer per channel, probably a simple 555 timer for cents each.

Do you mind me asking why its necessary to have such a long pulse? Do you require similarly extended pulses on other channels/axes?

Craig

Title: Re: Step pulse
Post by: Eyport on May 16, 2017, 02:58:28 PM

It's work!! I have used NE555 timer. The datasheet of "CharlyRobot" said me that I have need a long pulse. I use a rack of CharlyRobot. I keep the power party and I have replaced the command party. Like this -> http://www.usinages.com/threads/un-nouveau-avec-une-charlyrobot-emc2-sous-linux.24645/ (http://www.usinages.com/threads/un-nouveau-avec-une-charlyrobot-emc2-sous-linux.24645/)

Thank you

Title: Re: Step pulse
Post by: joeaverage on May 16, 2017, 04:14:53 PM

Hi,
they look like ordinary steppers to me. I think I would try a regular stepper driver, probably a Geko and see if it works, I suspect it will.
Thereafter conversion to Mach is straightforward.

Craig