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Well I started this thread nearly 6 years ago and have been running that very same machine like a dog! And it's still as rigid as the day I added the cables! I used a simple off the shelf plastic...

I tightened the cable one side of my gantry more than the other to pull it back into square. Afterward I shimmed the mounting plates on my bearing blocks to bring the rollers that lost contact with...

You might try connecting only 1 switch to the limit switch outs on your board then watch the diagnostic page in mach as you depress the switch and see if the light blinks on and off as you push it....

I did find that running my cnc from a laptop (which I did for a while before I built a dedicated pc for it) made it run slow, once I connected it to a desktop pc I had to re-tune the steppers as they...

what type of switches are you using no/ nc? and how did you wire them? I used a cheapo radio shack push button switch that is a nc switch that way if a wire were to break or become mysteriously...

I just came across your thread, that was my post about adding in the cable system to increase the rigidness. If you apply too much tension to one cable or the other you can pull your machine out of...

I was getting missing steps from an underpowered power supply, I upped my amperage and my missing steps went away.are you running mach3? I have had lags before because of to many processes running on...

I'm probably stating the obvious here but I would apply the gantry corrections to the areas circled in red. If you try to correct the skewing at the areas circled in blue it would cause binding on...

I'm glad it helped you! it made a huge difference in my machine as mine is driven from a single side screw, you should have seen the rediculous amount of slop my rig had before I added the cabling.:D

Well if you are using mach3 you could click the stop button during the move towards the area of the image you want to cut all the way through, shut off your router, change the bit (being careful to...

What springlakecnc is talking about is on the motor tuning page in mach3 it's the acceleration box, changing this value will cause the servos to either gradually build up speed or accelerate...

here's an idea for you that might be a quick fix.

Here's a thought for you (hope it's clear enough I did this quick)
it's simply a moving support with veeery few parts!;)

This is true.

You would want to use a rub block, anything threaded or thin enough to get into your all thread would have a tendancy to want to travel in the direction the threads are winding. A rub block would...

here's my 2 cents, I use a product called bo-shield it's a preventitive for stationary equipment i.e. tablesaws, jointers... but it works on any metal. you could also use beeswax works great as a...

Haven't seen anybody use it on the x axis but I don't see why it wouldn't work, but how much racking is there really on the x? with both rails so close together I would think there wouldn't be very...

It's working great for me, my screw is on one side of my machine for the sole purpose of being able to cut material placed beneath my machine. Having my cables cross on the strut attached to the...

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vacile

The accuride system is what I used as a model for my cabling system look here. http://www.accuridepocketdoor.com/

another design offered by KV uses a rack and pinion look here...

which hardware are you refering to? if it's the patio door hardware any of the patio door rollers will do I just looked for the most stout of what was available.

You could also use cross dowels for areas where to pieces of mdf make right angles these make things far stronger than they would be by just threading into the mdf/wood...

vaccum clamping is great but it does require a pretty forcefull vaccum draw to hold everything ridgid. If you are cutting these letters from larger pieces of material you could add "tabs" or...

I've seen this design done before, the guy fabbed the bearing supports with homemade aluminium castings it looked very promising to me when I saw it and still does.

Dual screws I would say is the best way to stay square but you have to keep them in sync and it's going to cost you a bit more depending on what screw system you chose because you have to duplicate...

Thats a good thought BobF but whether the pulleys were attached to the gantry or the table you still get the effect that joe is describing, if you apply enough force you can cause the gantry to rack;...

Thats pretty awsome tolerances! will that stay consistant though as the belt stretches? just as with timing belts in cars and other machines the tension on it causes the teeth of the belt to get...

Joe, I think you meant " drives his gantry from the side" you are correct in thinking if you locked down your machine on one side using a cable system that it would skew.On my rig it takes about...

I'm glad it helped you Peter, I was sitting at work one day (I own a cabinet shop) and I was trying to figure out how to get rid of my racking issue caused by my wanting my drive screw to one side of...