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Take the DB9 connector apart and check your wiring for pins that are not soldered properly, loose or too close together. It's a really tight space with little margin for error. I blew one up...

Couple things to experiment with. Change min PWM to 1%. Change the Step Low Active to disabled. Change Step and Dir ports to 1 like the stepper motors.

This is a good start.

http://www.cnczone.com/forums/gecko-drives/71766-g540-pwm-mach-settings.html
and
G540 VFD

After you confirm some of the settings, you can click the "spindle cw" button...

You can replace the POT with the 3 wires from your G540 VFD. Just hook them up according to how they are on the POT now (7 to GND, 8 to VR, 9 to +V). The G540 takes the input from pin 9 and adjusts...

Kelinginc used to sell a motor and driver combo package but there were some issues. It appears they have pulled them from the site now. If you search this site for BLDC or Brushless motors, you'll...

I was the one who posted that and I use the same 2 size end mills primarily in aluminum. The speed is going to depend on what type of end mills you use, carbide or hss. When I ran the calculations in...

Thank you so much for the tip. I was running into this issue and I thought my screen set was screwed up. Fortunately when I ran into this issue I was touching off of a piece of printed circuit board...

Mine has the identical problem. I just got my tormach collet and tool holders today.

What did you end up doing to fix? Is that collet too hard to put in the lathe? Would it be easier to cut the...

More inputs. It seems most of the wiring done is a compromise to accommodate only 4 inputs. It would be nice to have home switches, limit switches, speed input and probing inputs all with dedicated...

I haven't installed mine yet. I just received the 3 pin header and connectors a couple days ago. I also wanted to be able to re-tune all of the axis' at the same time since you need to change the...

I used the spare parts I had and soldered up a much as I could. There are still 2 diodes, 4 pin headers and the 1K POT remaining before I test it on the mill. Overall I think the quality of the PCB's...

I would double and triple check the wiring to the motors. It looks like a short. I had the same issue with one of the drives in my G540. It turned out to be a bad connection in one of the DB9...

I ended up getting the 7x10 lathe. It was on sale for $499 plus the 25 off brought it down to $375 plus tax. At that price I could probably sell it for close to what I paid in year or so when I can...

In case you've been saving up for something special.

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I ordered 10 of these under the prototype program through iteadstudio for $16 with shipping. We'll see how they turn out. The actual size of the board is roughly 2" x 2". Hopefully I didn't overlook...

I wish I would have looked at those PCB sites over in MACPOD's thread before I spent the time drawing the XMT controller PCB up in Pad2Pad. I saw the "mm" reference and thought there's no way this...

I already tried with my AVR Dragon programmer. The Fuse Bits are set to locked so there is no reading it unless you know of a way to unlock without erasing it.

Do you have anyone that would help you with the wiring? It's not that hard and the diagrams and info are plentiful. I got the G540, power supply and 381oz motors from Keling and am very pleased. I...

That seems to work well for me. Once you get up close to the maximum listed, it's easy to stall the motor unless you slow down the feed rate quite a bit. I can't way to see how others weigh in though.

Try swapping that motor to another known good drive and cable. If it works, it could be the driver or something wrong with your cabling.

Clint you answered my question as you are not using a G540. Looks like Don's solution may be perfect for you. I might even switch my spindle control out to this since it sounds like it does closed...

What's the best way to determine the actual capacity of a controller? What component(s) limit the total wattage? I have a mill with the following controller:

LittleMachineShop.com - Motor...

It's a simple test to verify. Pull the cover off to get access to the POT/Speed Dial on the Mill. There are 3 pins on the POT. One of the outside pins goes to Ground (that's your pin 7 on the G540),...

That 3-pin connector IS for reverse. If you compare the wiring diagrams in the SC2 and SX2 user manuals, you'll notice the SA2 connection which is the direction switch. It actually only uses 2 of the...

Can you just take one of the 3 Hall Effect sensor outputs and feed it to Mach3? I have a G540 the will take an Input from a Hall Effect I believe.

ClintH -
What are you using for a Stepper Drive? I run mine from the VFD output on the G540. Used this as a guide G540 VFD

Thanks Don!! :cheers:

Exactly. The first 2 docs I attached were both from Keling and show

A+ 9
A- 8
B+ 7
B- 6

However if you look at post #4, their own doc shows another motor model wired reversed. The 3rd...

Great ... now which pins, 6-9 are + and which are - on the G540 DB-9? Does A and /A or B and /B mean something to you?

Does the polarity of the connections going to the steppers matter as long as they're wired to the correct coil? I've seen multiple diagram's, even from the same source that seem to contradict. Here...