Problem- G 540 set up info?

[Fastest1]

When I purchased my G 540 I received 2 pamplets.

G 540 Initial Setup Guide
G 540 4-Axis Drive System Rev. 4 11/18/09

I have read both of those pamplets many times over before and during the setup. I read all I could understand here and on the Gecko site and the Yahoo groups. I see it refers to setting the pots and such. But where is there a physical example such as a drawing of this? I have the G540EZ's and though easy to use once figured out where to measure the resistance. At no time have I seen this info. Not bad mouthing the product at all as it seems to be coming together quite well but IMHO the directions leave a bit to be desired. No other complaints!

[Fastest1]

42 views and not 1 reply, maybe I am not the only one who didnt see it?

[Dorsal]

Maybe the other 42 people and I can't figure out:
What, exactly is your question?

If you're asking how to measure the resistance of your motors, check the resistance of each of the coils on the motor, OR, just look-up the spec sheet for your motors, online.

If you're asking how to calculate the value of the "current set resistor" or "pull-up resistor", it should be 1000 Ohms times the "per-phase amperage" of your motor when it is connected as you will be using it (parallel, series, bipolar, etc.) That value will also be given in the spec sheet for your motor.

[blades]

I've looked at the various G540 docs and didn't see anything that explains how to adjust the trim pots.

[Crevice Reamer]

Since the G540EZ is so new, apparently Gecko has not caught up to the documentation. Also, not many have them yet. This version uses trim pots instead of soldered resistors. You set the Amps by reading Volts at test points. Three Volts reading equals three Amps current set.

It was originally discussed here:

http://cnczone.com/forums/showthread.php?t=75576

CR.

[CoAMarcus]

CR or Fastest1,

What is the G540EZ? I do not know what that is and a Google search comes up with nothing.

Marcus

[Crevice Reamer]

Originally Posted by CoAMarcus CR or Fastest1, What is the G540EZ? I do not know what that is and a Google search comes up with nothing. Marcus

Well, no WONDER no one knows what it is, if YOU don't.
I just assumed you had put the previously mentioned trim pot current limit setting into production and called it the G540EZ.

What the heck do you HAVE then Fastest1?

CR.

[CoAMarcus]

CR,

Yeah we did not implement that for the G540 but are trying it out on the new G201X. I assumed he was referring to some sort of board similar to the Gecko Chiller.

The trimpots are used to adjust low speed smoothness on the G540. Just set your motor to run at about 2 RPS (120 RPM) and turn the trimpot until the motor sounds the smoothest. The trimpot has 270 degrees of travel so do not over tighten it. It is designed for a Philips head screwdriver but is shallow enough that a small flat blade screwdriver will work as well if not better.

Marcus

[Crevice Reamer]

OK Fastest1. You apparently have a normal G540. Why are you calling it a G540EZ?

Your G540 will need to have 3.48K resistors soldered into the DB9 connectors for the X and Z axes, and a 1.2K resistor installed for the tool changer. The diagram for installing these is marked right on the face of your G540.

The 3.5A X and Z will work without resistors, but the motors may overheat because running without resistor shuts off the idle current limiting. The 1.2A tool changer motor should NOT be allowed to draw 3.5A, which is the case with no resistor installed.

You should carefully check your Z axis motor wiring, because a bad or loose connection can cause that axis reversing problem.

CR.

[Fastest1]

I guess I am a trend setter. I am running a G540EZ, I purchased them from Soigeneris and assumed it was gecko product. It works well anyway and I am sorry if I placed the lack of instructions in the wrong place! To the above replies, I knew how to calculate, not how to measure the value on the new pot. My DB9's have a trim pot built in under the cover, no resistor needed. Now that I have figured it out better I like it. It was very reasonable in price and adjustable. But in regards to my original gripe, some of the instructions are vague. If I can quantify how to improve it, I will be happy to.

[Fastest1]

Btw here is a link to the product.http://cnczone.com/gecko.aspx
Hope this isnt stepping on any toes. I am not connected with them in any way, just a satisfied customer (would like better instructions from whomever!)

[Crevice Reamer]

OK. All is now made clear. It's an add-on DB9 connector that eliminates 2 solder connections, and substitutes a pot for the resistor:

Link won't work.

You'll have to google soigeneris dot com, click products and then select gecko.

Costs a lot more than a fifty cent resistor.

CR.