CRP full 4x4 kit by Euro3D

[Euro3D]

Thanks for the photo showing there will be enough clearance of the rack and pinion drive near the frame I have protruding past the extrusion by 0.5 inch.

By the way I did exactly the same thing after your post went and pulled the drive wheel out to see if it would fit and worked out the good news as well so the creating dust will have to wait until the first cut!

Onto the gantry risers!

[Euro3D]

Preparing the red risers for the CRP4848 CNC Machine. The tip from Tooldesigner to mount the rail cleaning brackets first as the bolts and bracket mount into the underside of the red riser bracket is spot on.

[Euro3D]

I leave the steel rail bolts loose so that the steel rail can slide out from the machine which provides good access to the underside of the riser for the adjustment of the bearings.

The parallel bar is used to square up the two linear carriage ways with the red riser base plate.

I then slide back the steel rail, temporarily reset it to sit centre on the aluminium extrusion, then snug up each end bolt, install the end plate and check that both linear carriages touch the end stops simualtenously, they do.

Success with the first fine tune!

John

[Euro3D]

Installing the large and very heavy Y axis Gantry beam onto the red risers for the CRP4848 CNC Machine Kit and then fine tuning for squareness.

The indicators for squareness are the simultaneous touching of the four linear carriage ways against the four bump stops x 2 as there are four bump stops at each end of the machine.

So if you get all 8 touch points perfect you have squared the y axis gantry to the X axis base. A big milestone!

You can see in the time lapse video date stamp I spent a half hour fine tuning and got oh so very close will have another go this evening as I want it perfect!

John

[Euro3D]

I had another go at fine tuning the Y axis. This time I moved the gantry upto the bump stops, one side was touching the stops the other was not.

I then loosened off the 8 bolts holding the gantry riser to the carriage way for each side and the 8 bolts each side holding the gantry extrusion to the gantry riser.

This then allowed the linear carriae ways to be moved hard up against the bump stops. Then clamped the linear carragie ways so they do not move whilst tighten the up all the bolts (x32)

Attained perfect alignment, gantry touches both bump stops at both ends.......squareness is looking exceptional on the x and y axis!

Time to fine tune around 50 minutes.



John

[Euro3D]

Both X and Y axis were square but noticed slight binding in section on the X axis. So loosened all the bolts on the steel rails of the x axis and straightened up the steel rails using the parallel bar and the result was smoothness of the gantry running up and down the entire x axis.

Time to adjust 15 minutes

John

[Euro3D]

Very straightforward assemble of the steel rails onto the Y axis gantry. The rails clamp down neatly with the aluminium brackets included in the kit for a dead parallel result.

Time to complete 30 mins

John

[Euro3D]

Installed the rack and pinion drive rack on the CRP4848 Y axis gantry. The clamps are a tight fit and need gentle tap with a soft mallet or piece of timber to get them into the slot enough so that the nut can be started. You will also need to use a flat blade screw driver to slide this into the slot to lift the carriage bolt up so that there are 2-3 threads protruding from the clamp to get the nut started. Then tighten gently and evenly to lock down the rack

Time to install 30 minutes if you follow this procedure, add 60 minutes if you strip a carriage bolt there are no spares so you are off to the vice to cut down a bolt as you cannot find the exact length! In my case I had to use a metric carriage bolt so also had to file down the square under the head as it was the wrong size!

The tolerances in this CNC Router Parts kit are extremely tight which is a very good thing!

John

[Euro3D]

Assemble the bearings onto the linear carriage way for the Y Axis then install these on the Y axis gantry. Using 'Tooldesigners' tip is need which is to install two threaded rods with nuts to clamp the carriage ways together then mount the Z plate. Check for squareness and tighten. Squares up very easily and now have a perfect square for the X, Y and Z axis.

Time to complete 1 hour.

[Euro3D]

Key point before you start is get organised with all the components and then watch 'Tooldesigners' video of the Z axis and has a number of must see tips.

The assembly of the Z axis then flowed beautifully and took less than hour.

There are some very nice components in the z axis such as the antibacklash coupler, the 5 start screw rod, main bearing housing and the thrust washer assembly.

Time to complete 40 minutes.

John

[Euro3D]

This post for some photos of the way I chose to mount the spindle mount to the Z axis. I took some metric hex bolts trimmed them down and rounded the nuts so they would slide into the T Slot.

Photos below show the bolts ready to mount the spindle. At the same time I was doing his 'Tooldesigner' posted the problem with his spindle getting jammed inside the spindle mount.

So I decided to see if my spindle (outer diameter 80mm) would fit easily into the spindle mount prior to mounting the spindle mount. And the result was it does not fit easily. Measuring the internal diameter of the spindle mount with no tension on the clamp gives 79.8mm. So there is an interference issue with the spindle mount in addition to any flexing issues 'Tooldesigner' has uncovered.

The solution I am going to try is to remove 0.5mm of material from the inside of the spindle mount, this should create sufficient clearance for the spindle to slide in and out of the mount easily when the tension is released.

John

[Euro3D]

I removed 0.5mm of aluminium from the inner face of the spindle with a hone and drill. The spindle slide in for a very snug fit.

The time to complete this mod was 90 minutes including mounting and installing the Kent dust shoe.

Photos attached.

John