Flappy machine - Advise needed please!

[cncJim]

Haha! I'll do my best to stay off your list of fools Jazz! No guarantees mind!

Would you mind taking a look at the parts of my machine and give me your opinion? I don't anticipate that I can economically improve the machine but I would like to learn more on what to look for in the future.

My machine's frame is made from approx. 100mm x 40mm welded steel box section
X axis is 1200mm of 25mm unsupported rail
Y axis is 2 x 700mm of 20mm unsupported rail
4 x Zapp steppers
Ballscrews on all
1.5kW Chinese Spindle + Matching VFD
2 x Leadshine SPS705 power supplies
4 x Leadshine Microstep Driver M752
Spindle V3 Board
PCPPS bob

From what I have read on this forum, most of the parts are pretty good (I am only cutting thin wood) but the rails are the big area of issue, mainly from an accuracy point of view. Would that be right?

Also, back to my original issue, does it look like it comes from the flexing on the y axis?

Here is a pic...


If I feed too fast the red points end up being curved rather than a sharp right angle?

I don’t think putting it back on ebay is not an option at the moment though - Not sure how much it would fetch but for the price I paid I wouldn't be able to buy a decent complete machine to replace it. I also really enjoy using it at the moment and feel like I am learning lots every time I fire it up.

Cheers,

Jim