Messages

91

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 27, 2010, 04:05:05 AM »

Slow progress at the moment as all of this stuff is really fiddly and takes a lot of time to get right.

slide rails are all in ready for the draws:

92

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 24, 2010, 02:33:24 AM »

Oh btw good shipping conformation from cnc4pc parts are on there way yeeha!

93

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 24, 2010, 02:32:39 AM »

Got a few hours today, spent them on the MPG tunnel:



After that i spent some time trying to realign the door, i think im going to be able to get away without cutting the coolant tray off and reattaching it. i can see it now clear as day that it is warped in two opposing corners. lathe is looking good yes?

94

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 23, 2010, 04:52:37 AM »

I hadn't thought of that, a great way to avoid cutting the coolant tray from the base and re welding it.

thanks for the tip.

95

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 23, 2010, 03:15:02 AM »

I spent a few hours today working on the lower set of draws, this stuff is really fiddly but has to be done:



Ive got big problems, i had picked up on this throughout the build but knew i wouldn't be able to get a good idea of how far out things were until i had four sides together:



There is huge variation in the in the gap along the top of the door id say there is around a 15mm height difference. This probibly happened during the welding up of the coolant trey, from what i can work out one end is way lower than the other. this is going to be a major to fix, I really don't know what I'm going to do.

96

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 22, 2010, 04:56:10 AM »

It was a nice day to get out of bed and out of the house, I'm still quite sick but enough is enough.

Progress: the keyboard shelf well the first part of it anyway:



The control panel, i have most of the buttons worked out, I'm thinking I'm going to need more though:



Im staring to wish i had have thought of the keyboard back in the design process (not that there was much of one) i would have loved to put a little touch screen above the buttons there.

97

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 21, 2010, 03:58:37 PM »

http://www.gasspringstruts.co.uk
http://www.strutsdirect.co.uk
seems pretty reasonable from the small amount of browsing I done.

Gas strut $15, Shipping to NZ $65 Nice.

98

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 21, 2010, 03:24:51 PM »

I don't see how motor voltage makes a difference as long as the PSU is also 50v can you please explain.

High speed torque increases as the ratio of the motor power supply to coil voltage increases. Typically, voltage to the motors are between 4-10 times the motors stated value. If your motors are 5V, then 10x5=50, and then your drives are at their maximum rated voltage. If your motors are something like 20v, then 10X20= 200V, which is way more than the drive will handle. If it were me, I would look for something under 5v, and stay away from maxing out the drive.

Can i make what i have work? what will be the downside if i do use what i have?

99

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 21, 2010, 02:54:54 AM »

Thanks for the reply Dan, I don't see how motor voltage makes a difference as long as the PSU is also 50v can you please explain.
2:1 is the motor the 2 or the 1?

thanks.

100

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: November 20, 2010, 07:18:49 PM »

1. I have 2x 269oz 2x 387oz 2x 425oz step motors from PH http://homanndesigns.com/store/index.php?main_page=index&cPath=25 my plan was to use a 269 for my X axiz and the 387 for the Z axis is this the best option?

I would think so, but maybe the heaviest axis would be best with the biggest motor.

The 425oz are slower, ill try it and post the results.

3. Is it possible to have a third axis that when enabled (with a switch) homes itself, then goes to the current z axis position, then mirrors  the z axis?

Not sure about this, would need more explanation of what its actually for and when its going to be used.


More on this coming soon, ill get it all straight in my head frist.

thx