ZX5 Transfer Table Setup

How to correctly set mesh between racks/pinions, V rail and delrin rollers

Difficulté

Easy Facile

Durée

20 minute(s) minute(s)

Introduction

Sometimes the mesh between all the parts is too tight and left with no adjustment. This causes too much pressure on the moving parts, especially the delrin rollers which are not designed to take heavy loads. Any excess force on them leads to excessive wear and premature failure.

Étape 1 - Misadjusted

Étape 2 - Access V rails and adjust.

Remove pinion gear by slackening off grubscrews and sliding away. Good idea to mark up original position.

Disconnect airpipe feeding popup cylinder and slide off rack mounting plate.

Slacken all 20 caphead screws, they only need a half to full turn. Move the rails up as far as they will go and then tighten just the screws on each end, finger tight is enough. These rails come in two parts, ensure they are fully mated together or they will cause tight spots later on. Using the joiners square in the picture set to 47mm, use it to set height of the V rails when the bubble shows it is level. Check at each end and in the middle. Once level, tighten all screws and recheck level.

Étape 3 - Check and adjust Delrin rollers

The rollers on top are mounted on eccentric bushes. We only need these just tight enough to not allow any slop or vertical play. Slacken the cams off completelely, you will need an 8mm spanner with the faces ground down to fit in the space.

Slide the plate onto the rail and tighten the eccentric bushes until any vertical play is removed. Lightly try to move the assembly on the X axis, if there is any slop then it needs to be a little tighter but probably no more than an 1/8th of a turn. Once set you should still be able to spin the rollers by hand, but still feel a fair bit of resistance. Once set slide the assembly over the full length of the V rails to check fo any tight spots. If there are then you need to check that the two halves of the fail are fully mated!!!

Étape 4 - Adjust Rack to Pinion

If there is no adjustment between the mounting plate and the rack as shown in the first picture, then we need to introduce some. Thisis the mostimportant step as it ensures all the parts are running parallel to eachother and not causing excessive force!!!

Get your sharpies oot and mark where the rack and pinion mate!!! Slacken off the larger screws, one at either end of the rack until you have a 3mm gap at each end. This is easy when removed, but once refitted you will need a cut down allen key to fit in the gap to adjust. Back off the set screws if not already. Slide the assembly back on and mesh the pinion to the rack at one if the ends, it does not matter which, lightly tighten a grubscrew on pinion to ensure there is no backlash felt between the key and keyway. Using a combination of the set screws and adjustment screw, adjust until there is no play between rack and pinion. Then turn each of the small set screws back an 1/8th to 1/4 turn and fully tighten the adjustment screw. This introduces a very small amount of play that should hardly be felt, but is just enough to stop premature wear between the two. Remove the pinion, slide the rack to the other end and repeat the process. Recheck the first end in case it has moved slightly while doing the second. Set distance from beam to popup cylinder using measurements from another assembly, or if you were clever enough you took these before taking everything apart? I wasn't! If it needs adjusted then slacken off the two setting bolts, they give around 10mm on the mounting slots. 1mm either way is good enough and will not cause problems. Reconnect air pipes, make sure everything is locked off and tight, job done.

Étape 5 - Other Checks

If any of this is carried out on a beam that carries a crank sensor, it will need checked and adjusted to ensure correct operation.

It is also worthwhile slackening off all the screws that hold the air pipe harness, let it find its own position and then tighten back up. If not done this can introduce pull on the brackets that carry the Delrin rollers.

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