Trimpod with step motor A4988

@pwillard:

Fact: Counterclockwise on that board = Less current Clockwise = More current.

Only true for Pololu originals. Most clones are increasing CCW! See my reply #17.

I think, the OP has now enough information to think about and make up his mind. It's not our money and time which he might be burning ...

@raschemmel:

More than likely it is either a single turn pot or a 10 turn pot but since you did not post a vendor link for the A4988 it is impossible for us to know.

Do you know if there are A4988 other than with the “normal” 270 degrees trim potentiometer on the market?

Where does it say it is from Pololu ?

Hi, I have NEMA 16 motor and I connected it to A4988

Do you know if there are A4988 other than with the "normal" 270 degrees trim potentiometer on the market?

Mine is 270 degrees, which is actually what I meant by "single turn" (my bad).

I rather doubt there is anything different out there.

@rpt007 thank you! My driver is original so your answer is great. I will test it in this weekend and come back here to tell you if I burned my motor or if I could calibraate it correctly :) No worry, I will do this at my own risk.

batata004

You say the pot was very loose and you've tightened it up - it now should only move about 3/4 turn...

it's quite possible you've damaged it.

A multimeter would be very handy for finding out if this is true.

Anyway , good luck with your project.

regards

Allan

it's quite possible you've damaged it.

\

If you used any force at all to make turn after if stopped turning then it is damaged. As stated , it should only turn 270 degrees. If it is turning more than that it is damaged.

Some of you are not as creative or resourceful as I, so you surelly need a multmetter, you need to pay a course to learn arduino, to learn programming

That certainly explains why I have been so confused at times!

That certainly explains why I have been so confused at times!

But you were at least able to measure the level of confuseness with your MM :sunglasses:

Some of you are not as creative or resourceful as I, so you surelly need a multmetter, you need to pay a course to learn arduino, to learn programming

If you're so smart, why are you posting ?

Thank you guys, I thought yersterday that I had damaged my trimpot but after puting it gently in place it does not turn more than once. As some of you said, it probably turns no more than 300 degree so I hope I didnt break it yet.

I will try spin it CCW as you said and increase the current little by little and check if it works.

@raschemmel I am creative but I dont know everything, even with my whole creativity sometimes I need to ask to less creative people (but more inteligent at certain subjects) some advice.

it probably turns no more than 300 degree

No. We said 270 degrees.

@raschemmel I am checking and mine is turnin around 300 degree not 270. Maybe it's indeed broken, but I will have a try with it when I get to my shop and get the motor to test.

I am creative but I dont know everything, even with my whole creativity sometimes I need to ask to less creative people (but more inteligent at certain subjects) some advice.

Isn't it amazing that a simple trimpot can be such a major stumbling block?

Isn't it amazing that a simple trimpot can be such a major stumbling block?

I believe if you use a meter to monitor the voltage the calibration can be done in under a minute.

Hi batata004

Just because people have specialist knowledge doesn't mean they're not very creative ( whatever that means)...

I hope we've been able to help.

regards

Allan.

A creative person could probably change an automobile tire using a screwdriver, but I suspect that use of the right tool can make most jobs a bit easier.

Yes, a creative person can do A LOT of things while inteligent people can do only a few things well done. You dont need an astronaut or a PHD in mechanics to change an automobile tire, you can get your screwdriver and solve the problem by yourself.

A creative person could probably change an automobile tire using a screwdriver, but I suspect that use of the right tool can make most jobs a bit easier.

When I was canyon racing in Southern California I got a flat on my Yamaha FJ-1100 and had to repair the tire (with a Vulcan tube repair kit) and I was wearing full leathers on a hot summer day. I took off my jacket and was trying to get the tire back on the rim after repairing the tube and I was having trouble getting the tire onto the rim. Just then some other canyon racers came around the corner and stopped to help. One of them suggested I use suntan lotion to lube the rim and that made all the difference in the world. I was back on the road in 10 minutes.

You dont need an astronaut or a PHD in mechanics to change an automobile tire, you can get your screwdriver and solve the problem by yourself.

FYI, This is the tool I needed . (I didn't have a screwdriver)

Yes, a creative person can do A LOT of things while inteligent people can do only a few things well done.

Are you still having trouble with that trimpot?

@jremington probably not, in the weekend I will check it out and see if it works. If not, I will come back here to ask suggestion from not creative but inteligent people of this forum who always try to help; sometimes in a inteligent way and other times in a creative way - which I prefer more.