getting started on the Z

[craftech]

I started on this axis because i think there are the most parts on it, i still need to instal the rear linear bearings and both backlash nuts with there suports for Y and Z will make, just wondering if the wheite of all of this will affect the stepper , i will have about 8 inches of travel ,will need someone to make me brackets for my router , should i bolt them right on the stage or to a seperate piece of 1/2 alluminum mounted to the stage,!!!!

[jcc3inc]

Dear Sir:

Your stepper motor looks to be the same make/size as the one I use. Mine runs 2" per revolution (rack and pinion) and handles about a 10# load OK. Since you have what appears to be .2 inches per revolution (5 pitch leadscrew?) you should have no problem with it. Also, since your Z carriage has weight AND you will no doubt add a router head (or ??), do you really need anti-backlash nuts for it? When will the down force exceed the total weight?

If you can give me the max ecpected Total Weight, I can calculate what the stepper can handle and reply to you.

Regards,
Jack C.

[craftech]

OK now what does 2'' per revolution mean!! and a 10 load ( lead screw is acme 1/2-10 per inche and as far as router head i am looking for a variable speed router that can decelerate to 16,000 RPM for machining small aluminum parts, not sure what you mean about the backlash i alwready have them but they are plastic or delrin i think The total weight of the Z axis with all the components without the router is 12.00 pounds, i guess add another 5 pounds for router +- lets say a total of 16 pounds.

And just the mooving section of the axis would be with the router 7 pounds.
Hey thans for looking into this for me Ok

Craftrech

[trubleshtr]

OK now what does 2'' per revolution mean!! and a 10 load ( lead screw is acme 1/2-10 per inche

2" is the distance the "nut" will move down the screw with one full revolution of the screw.

1/2"-10 is that correct??? If you measure 1" along the threads of your screw and count how many threads end up with in the 1 inch area you'll have ...well TPI threads per inch. Normally for UNC or UNF threads it would be 1/2"-13 or 1/2"-20.

You need to find out how far your nut will move with one revolution of the screw.

[trubleshtr]

Ahh...never mind about th 1/2"-10 it's acme rod you have right?

[craftech]

yes thats right ,i thought that the more threads i have the stonger it would be but also slower, i am also putting the stronger steper on the Z axis for a better plunge rate into harder materials like aluminum.