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Ramps v1.4 moving axis problem

printingBro

Ramps v1.4 moving axis problem
April 08, 2016 08:22AM

Registered: 8 years ago
Posts: 3

Just have installed and set up ramps v1.4 for a first time. The problem I have is trying to move axis I get every time, not depending how much I moved the dial (on 1 mm or 20 mm according to screen) axis move to the same really small step. It happens with all of axis. Maybe you guys have some ideas?

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Dust

Re: Ramps v1.4 moving axis problem
April 09, 2016 04:13AM

Admin
Registered: 13 years ago
Posts: 7,001

install micro stepping jumpers under the driver modules

update your steps/mm settings to match your hardware

Adjust your vref pots to set driver current

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wetsparks

Re: Ramps v1.4 moving axis problem
April 09, 2016 08:30AM

Registered: 8 years ago
Posts: 34

What version (Release Candidate) are you using of Marlin. I recently uploaded a version and found the same problem. I then went to the Git hub and uploaded the latest RC and all works problem free.

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JamesK

Re: Ramps v1.4 moving axis problem
April 09, 2016 08:54AM

Registered: 9 years ago
Posts: 1,873

You get bizarre movements if the endstops are triggered. Use M119 to check your endstops before moving.

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printingBro

Re: Ramps v1.4 moving axis problem
April 10, 2016 04:04AM

Registered: 8 years ago
Posts: 3

Yes, you are absolutely right. Thanks so much. I have fixed end stop issue and now it move better, but still wrong. The direction is ok, but amount is bad. Sometimes it jumps few steps back. You think current adjustment can help with this problem?

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SteveRoy

Re: Ramps v1.4 moving axis problem
April 10, 2016 12:40PM

Registered: 10 years ago
Posts: 477

Quote
printingBro
Yes, you are absolutely right. Thanks so much. I have fixed end stop issue and now it move better, but still wrong. The direction is ok, but amount is bad. Sometimes it jumps few steps back. You think current adjustment can help with this problem?

Also check the motor wiring pairs with a multi-meter, (as well as everything Dust listed)

My updated Instructable on our Prusa i3 Build
[www.instructables.com]

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printingBro

Re: Ramps v1.4 moving axis problem
April 11, 2016 02:29PM

Registered: 8 years ago
Posts: 3

So, I figured out what was the problem. Jumpers were inserted to 1/16, but chip I have (9488) could not handle that many micro steps. I changed it to 1/8 and now it works good. Thanks to all of you guys smiling smiley