Hi,
My first post on the forum. I have got the limited edition Ormerod no. 318. Its a fascinating build. A long way off finished yet! I have some questions, thoughts etc though.
Question 1 .. Any reason I shouldnt glue the x-rib to the x-axis-plate with CA glue? N.B. Prior to gluing I intend to sand with fine wd paper and use masking tape to prevent glue from getting on the machine surface where the xcarriage roller runs.
To keep it straight I thought I would stick the x-axis plate on the big flat side of a spirit level( which is the best engineering flat surface I can find around my place) with double sided tape .
Subtext :
I broke the x-rib at the tenon on the motor end. I managed to get this glued back in place with CA glue.
I am now in favour of gluing the x-rib to the x-axis plate with CA glue, since I dont want to rely on my CA joint on the tenon which appears to clamp the x-rib to the x-axis plate using the x motor bracket.
(I fitted the x-rib and x-axis plate but noticed that the plate was bowed,causing the xcarriage to rotate around the 12x350 mm smooth rod as the carriage was slid up and down. After re-reading the instructions I
figured I should have done a bit more filing ! The tenon broke off as I disassembled the x rib from the x-axis plate).
Question 2
Should I lubricate the linear bearings with machine oil before I fit them? They feel a bit gritty when I slide them..
Thoughts.
Screws with Allen are problematic and increase the build time considerably.
Is there any reason not to use cross head screws for some parts?
The worst offender is the highly recessed screw used with a t-nut to attach the z-lower mount to the yaxis frame aluminium extrusion. I tried various ways to get my allen key in the allen key hole in the screw. Sighting down the hole using a torch and slipping an m3 washer over the allen key to help centering it in the slot. Took half an hour and dont really want to go through that again!
other thoughts that might be helpful in the docs.
Y-axis motor.
Requires use of a cross head screw driver ( not mentioned in tools)
to remove the screw from the motor. Since the motor screw is done up tight
do make sure you have the correct screwdriver that fits snugly( not just any old cross head screwdriver) to avoid problems knackering the screw.
Y axis drive belt.
Take care not to overtighten the screws holding the microswitch
My first post on the forum. I have got the limited edition Ormerod no. 318. Its a fascinating build. A long way off finished yet! I have some questions, thoughts etc though.
Question 1 .. Any reason I shouldnt glue the x-rib to the x-axis-plate with CA glue? N.B. Prior to gluing I intend to sand with fine wd paper and use masking tape to prevent glue from getting on the machine surface where the xcarriage roller runs.
To keep it straight I thought I would stick the x-axis plate on the big flat side of a spirit level( which is the best engineering flat surface I can find around my place) with double sided tape .
Subtext :
I broke the x-rib at the tenon on the motor end. I managed to get this glued back in place with CA glue.
I am now in favour of gluing the x-rib to the x-axis plate with CA glue, since I dont want to rely on my CA joint on the tenon which appears to clamp the x-rib to the x-axis plate using the x motor bracket.
(I fitted the x-rib and x-axis plate but noticed that the plate was bowed,causing the xcarriage to rotate around the 12x350 mm smooth rod as the carriage was slid up and down. After re-reading the instructions I
figured I should have done a bit more filing ! The tenon broke off as I disassembled the x rib from the x-axis plate).
Question 2
Should I lubricate the linear bearings with machine oil before I fit them? They feel a bit gritty when I slide them..
Thoughts.
Screws with Allen are problematic and increase the build time considerably.
Is there any reason not to use cross head screws for some parts?
The worst offender is the highly recessed screw used with a t-nut to attach the z-lower mount to the yaxis frame aluminium extrusion. I tried various ways to get my allen key in the allen key hole in the screw. Sighting down the hole using a torch and slipping an m3 washer over the allen key to help centering it in the slot. Took half an hour and dont really want to go through that again!
other thoughts that might be helpful in the docs.
Y-axis motor.
Requires use of a cross head screw driver ( not mentioned in tools)
to remove the screw from the motor. Since the motor screw is done up tight
do make sure you have the correct screwdriver that fits snugly( not just any old cross head screwdriver) to avoid problems knackering the screw.
Y axis drive belt.
Take care not to overtighten the screws holding the microswitch