Search found 16 matches

by dcartier
Mon Mar 17, 2014 12:55 am
Forum: Assembly
Topic: How to get an SO2 square?
Replies: 6
Views: 2282

Re: How to get an SO2 square?

I decided to go ahead and rebuild the SO2's base to remove the MDF from the equation. So I ordered some 2040 extrusions planning to replace the 2020 and make the MDF into simple a waste board. Here is how it turned out once it arrived and was installed. https://lh3.googleusercontent.com/-qhgWnM8H_JQ...
by dcartier
Mon Feb 24, 2014 11:57 am
Forum: Assembly
Topic: Z-Axis Motor Stalls/Locks Up
Replies: 7
Views: 1708

Re: Z-Axis Motor Stalls/Locks Up

If the driver has a current adjustment (most do), you may want to check if the current is set too high. Assuming your motors are all the same, and the drivers are all the same, if one is running hot and the others are not, the one running hot may be adjusted for too much current. If you are using th...
by dcartier
Wed Feb 19, 2014 11:15 am
Forum: Design Ideas
Topic: Pulleys for gear reduction?
Replies: 6
Views: 1565

Re: Pulleys for gear reduction?

This post had me confounded at first. I now realize that he is talking about worst case measured accuracy with backlash, as opposed to theoretical accuracy. It my neophyte view, using one of the step calculators and inputting his deduced parameters (20 tooth pulley, 200 steps/rev), he should get 200...
by dcartier
Tue Feb 18, 2014 11:58 am
Forum: Assembly
Topic: How to get an SO2 square?
Replies: 6
Views: 2282

Re: How to get an SO2 square?

The thought of the rails being un-equal length also crossed my mind before I assembled the machine. I stood them all up on the kitchen couter and compared them. I was pleased that they all appeared to be equal lengths. That is not a bad idea about surfacing the ends. My brother is a machinist with 4...
by dcartier
Tue Feb 18, 2014 1:32 am
Forum: Assembly
Topic: How to get an SO2 square?
Replies: 6
Views: 2282

Re: How to get an SO2 square?

The tip linked from the wiki about using spring washers in between flat washers for the end bots is interesting. I had not considered that the bolt tension could be enough to twist the rails out of position. I will have to look into that to see if it helps in my case.

Dennis
by dcartier
Mon Feb 17, 2014 11:59 pm
Forum: Assembly
Topic: How to get an SO2 square?
Replies: 6
Views: 2282

How to get an SO2 square?

I have been struggling with level/square issues in my SO2 this past weekend. My X rails are 2mm out side to side when measuerd to the end plates .. and that is an improvment. Yesterday I was pulling my hair out trying to get things square. The end plates of the X, (that run on Y) were so far out tha...