Driver pulse duration setting location? I am using Arduino mega/Ramps 1.4/Marlin and am going to give the DRV8825 drivers a shot in place of the 4988's. Info on the 8825 via Pololus site reads- "The timing requirements for minimum pulse durations on the STEP pin are different for the two drivers. With the DRV8825, the high and low STEP pulses must each be at least 1.9 us; they can be as short as 1 us when using the A4988.". I m not having any luck locating this setting in Marlin. Anyone know? https://reprap.org/forum/read.php?1,600529,600529#msg-600529 Mon, 07 Sep 2026 02:42:14 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,600529,600752#msg-600752 Re: Driver pulse duration setting location? https://reprap.org/forum/read.php?1,600529,600752#msg-600752 Bill Clark General Fri, 25 Dec 2015 12:54:52 -0500 https://reprap.org/forum/read.php?1,600529,600630#msg-600630 Re: Driver pulse duration setting location? https://reprap.org/forum/read.php?1,600529,600630#msg-600630 -Olaf]]> o_lampe General Fri, 25 Dec 2015 01:58:08 -0500 https://reprap.org/forum/read.php?1,600529,600611#msg-600611 Re: Driver pulse duration setting location? https://reprap.org/forum/read.php?1,600529,600611#msg-600611
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Bill Clark
I am using Arduino mega/Ramps 1.4/Marlin and am going to give the DRV8825 drivers a shot in place of the 4988's. Info on the 8825 via Pololus site reads- "The timing requirements for minimum pulse durations on the STEP pin are different for the two drivers. With the DRV8825, the high and low STEP pulses must each be at least 1.9 us; they can be as short as 1 us when using the A4988.". I m not having any luck locating this setting in Marlin. Anyone know?

there isn't actually a setting for it, if you have a poke around stepper.cpp there is a spot that can be modified to put in a small pause so you can make the steps longer,]]> thejollygrimreaper General Thu, 24 Dec 2015 22:39:24 -0500 https://reprap.org/forum/read.php?1,600529,600529#msg-600529 Driver pulse duration setting location? https://reprap.org/forum/read.php?1,600529,600529#msg-600529 Bill Clark General Thu, 24 Dec 2015 14:00:27 -0500