Whilst working on my single arm SCARA robot I came across this video which I though I would post to show the potential speed and accuracy of these robots. If anyone has and details or images of how the end Z axis is implemented (it can plunge in Z and can rotate) please post any links. SCARA Robot https://reprap.org/forum/read.php?185,190156,190156#msg-190156 Wed, 14 Oct 2026 15:21:02 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?185,190156,190685#msg-190685 https://reprap.org/forum/read.php?185,190156,190685#msg-190685 xclusive585 Polar Machines, SCARA, Robot Arms Fri, 08 Mar 2013 02:39:34 -0500 https://reprap.org/forum/read.php?185,190156,190324#msg-190324 https://reprap.org/forum/read.php?185,190156,190324#msg-190324 alj_rprp Polar Machines, SCARA, Robot Arms Wed, 06 Mar 2013 19:18:18 -0500 https://reprap.org/forum/read.php?185,190156,190279#msg-190279 https://reprap.org/forum/read.php?185,190156,190279#msg-190279
One method

It took me a while to figure this particular one out, it looks like the Z axis is a large pitch lead screw, the slow motion part of the video shows it.

I think you may drive the lead screw directly with one motor and the lead screw nut with another.

1) Both motors turning the same direction. The shaft just spins with no rise or fall.
2) Turning in opposite directions the shaft either rises or falls. It actually goes twice the speed of the motors in Z and uses both motors to do it which is neat.

Its sort of similar in concept to the H-bot belt if I have it correct.

Now is this possible with RepRap bits?]]> martinprice2004 Polar Machines, SCARA, Robot Arms Wed, 06 Mar 2013 16:14:54 -0500 https://reprap.org/forum/read.php?185,190156,190160#msg-190160 https://reprap.org/forum/read.php?185,190156,190160#msg-190160
In my manual SMT pick-n-placer (left device attached image) is a small head, positioned in Z and rotated with a parallel stick - can take some images of the internals, if wished ...]]> VDX Polar Machines, SCARA, Robot Arms Wed, 06 Mar 2013 08:51:48 -0500 https://reprap.org/forum/read.php?185,190156,190156#msg-190156 https://reprap.org/forum/read.php?185,190156,190156#msg-190156
If anyone has and details or images of how the end Z axis is implemented (it can plunge in Z and can rotate) please post any links.

SCARA Robot]]> martinprice2004 Polar Machines, SCARA, Robot Arms Wed, 06 Mar 2013 08:34:31 -0500