Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: musicworld1 on October 29, 2018, 07:02:35 AM
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I am using Mach3 on Windows 7. The hardware is A4988 (stepper driver) and a small stepper motor taken from photocopier. I am using 12VDC and printer port.
The Motor Turning setup is:
Steps per unit >5080
Velocity > 6
Acceleration > 0.6
Step pulse (1-5 us) > 0
This setting works fine. But whenever I try to increase Velocity e.g. 10 or 15 or 20. The motor turns with only Velocity (6). I mean that I increase the velocity in Motor Turning Setup, but in practice it does not increase and it remain 6. I also tried to increase Step pulse (1-5 us) e.g. 1, 3, 5. But the velocity does not increase more than 6.
I also used 555 timer based step pulse generator in place of Mach3. When using 555 timer based step pulse generator, the motor turns with more than 6 Velocity and the motor run faster.
I could not figure out the problem. Using Mach3, the velocity should increase. Is there any problem with Mach3, printer port or computer itself?
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How do you know that you are only jogging at a velocity of 6 ?
(If you are looking at the FRO and Feedrate DRO's on the main screen then they show 6.00 until such time as a Feedrate is set - this does not mean that you are jogging at 6.00).
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To clarify, the default feedrate in Mach3 is 6 units/min. Try setting a higher feedrate using MDI.