Z Axis
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Please remember, Safety First. Never Adjust your router or sled without 1st unplugging the router from its power source.
Please check the market garden MaslowCNC Market Garden
Also some other person found a semi-replacable one in germany. That motor has these specs:12V , 250mA , 168:1 ,58.9 kg/cm , encoder 3.3-24v Hall
All in all, it better to wait for the shop.
Here is a basic version for the motor in the form of a Fusion 360 file
The Router Housing restrains the router with a tension collar adjusted with a nut and locked in place with a clamp. Adjust the nut until the router slides easily in and out, but is not loose in the housing when the clamp is closed.
If it is difficult to adjust the router housing so that the router is secure but still allows z-axis movement easily, you may need to clean and lubricate the spindle and housing. Remove the router and thoroughly clean the outside of the spindle and the inside of the router housing, removing any dust or grime and apply a very slight film of dry lubricant, wax or oil, wiping up any excess. Re-Seat the router in the housing and adjust the restraint nut accordingly.
Make sure that you do not allow any twist or movement other than directly moving the height adjustment rod when the Z-axis is in motion. Any bowing or flexing or other similar movement will result in a loss of accuracy in the Z-axis. This is best done by ensuring accurate and secure placement of the Z-Axis bracket, motor and coupler.
It is important that there be no 'play' in the vertical adjustment screw of the router. Users have found that if they provide a constant amount of backpressure, or downward z-axis force, any play in the screw is removed and z-axis accuracy increases. This is easily done by securing a strong bungee over the top of the router spindle, anchoring it on the handles on either side of the router housing.
The ring system prevents the handles from being installed. Here is a simple alternative that is compatible with the ring system. I use small plywood blocks to give the bungee a purchase on the ring, and a pipe with a couple saw kerfs taken out to locate the bungee. The bungee is one large loop 'lobed' into 3 loops, allowing for each lobe to equilibriate:
